Research activity information

• Oct. 2021 The 4th International Symposium on Green and Sustainable Technology, Best Presenter Award, Generation Mechanism of Tidally-driven Whirlpools at a Narrow Strait in an Estuary

  Uchiyama, Y.

  共同研究・競争的資金等の業績IDIRI


• May 2021 土木学会, 令和2年度土木学会賞・国際活動奨励賞

  内山雄介


• Oct. 2020 神戸大学工学部, 令和元年度優秀教育賞

  内山雄介


• Oct. 2018 Elsevier, Outstanding Contribution in Reviewing Award 2018, Ocean Modelling

  Uchiyama, Y.


• Oct. 2018 Elsevier, Outstanding Contribution in Reviewing Award 2018, Progress in Oceanography

  Uchiyama, Y.


• Jul. 2018 Elsevier, Outstanding Contribution in Reviewing Award 2018, Deep-Sea Research Part I

  Uchiyama, Y.


• Oct. 2017 神戸大学, 平成29年度学長表彰

  内山雄介


• Sep. 2016 神戸大学工学部, 平成27年度優秀教育賞

  内山雄介


• Nov. 2015 Elsevier, Outstanding Contribution in Reviewing Award 2015, Continental Shelf Research

  Uchiyama, Y.


• Oct. 2015 神戸大学工学部, 平成26年度優秀教育賞

  内山雄介


• Oct. 2014 Elsevier, Outstanding Contribution in Reviewing Award 2014, Ocean Modelling

  Uchiyama, Y.


• Sep. 2014 神戸大学工学部, 平成25年度優秀教育賞

  内山雄介


• Sep. 2014 IAHR-APD, Best Paper Award 2014, On tridimensional rip current modeling

  Marchesiello, P, Benshila, R, Almar, R, Uchiyama, Y, McWilliams, J, Shchepetkin, A

  共同研究・競争的資金等の業績IDIRI


• Aug. 2014 公益財団法人クリタ水・環境科学振興財団, 平成26年度クリタ水・環境科学研究優秀賞, 瀬戸内海全域における外洋影響を考慮した広域流動の動態把握と内湾環境保全戦略

  内山雄介

  共同研究・競争的資金等の業績IDIRI


• Mar. 2014 Elsevier, Most Cited Ocean Modelling Articles, Wave-current interaction in an oceanic circulation model with a vortex force formalism: Application to the surf zone

  Uchiyama, Y, McWilliams, J.C, Shchepetkin, A.F

  共同研究・競争的資金等の業績IDIRI


• Sep. 2013 神戸大学工学部, 平成24年度優秀教育賞

  内山雄介

• Quantifying connectivity between mesophotic and shallow coral larvae in Okinawa Island, Japan: a quadruple nested high-resolution modeling study

  Kimika Takeyasu, Yusuke Uchiyama, Satoshi Mitarai

  Coral bleaching has recently been occurring extensively across the world’s oceans, primarily because of high water temperatures. Mesophotic corals that inhabit depths of approximately 30–150 m are expected to survive bleaching events and reseed shallow water corals afterward. In Okinawa, Japan, mesophotic coral ecosystems have been reported to serve as a refuge for preserving the genotypic diversity of bleaching-sensitive corals. The connectivity of larval populations among different habitats is a key element that determines the area to be conserved in desirable coral ecosystems. Because coral larvae are largely transported passively by ambient oceanic currents, particularly in the horizontal direction, numerical ocean circulation models greatly help to quantify connectivity with detailed spatiotemporal network structures. The present study aimed to quantify the short-distance connectivity of shallow and mesophotic coral larvae in reef areas on the northwest coast of Okinawa Island. To this end, a quadruple nested high-resolution synoptic ocean model at a lateral spatial grid resolution of 50 m was developed, which was capable of realizing detailed coastal currents influenced by complex nearshore topography, and coupled with an offline 3-D Lagrangian particle-tracking model. After validating the developed model, short-distance horizontal coral connectivity across reef areas on the northwest coast was successfully evaluated. The alongshore lateral connectivity had apparent asymmetry caused by depth-dependent horizontal currents, whereas the larvae spawned at shallow and mesophotic depths were reachable to each other. Such across-depth larval dispersal was attributable to the mixed-layer depth in the spawning period, viz., the boreal spring, which approximately coincides with the boundary between shallow and mesophotic coral, leading to the intensive vertical exchange of virtual larvae.

  Corresponding, Frontiers Media SA, Apr. 2023, Frontiers in Marine Science, 10

  [Refereed]

  Scientific journal


• COASTAL DISPERSAL OF CORAL LARVAE AND ASSOCIATED 3-D CONNECTIVITY IN THE REEF AREAS AROUND OKINAWA ISLAND, JAPAN

  Kimika TAKEYASU, Yusuke UCHIYAMA, Satoshi MITARAI

  Corresponding, Japan Society of Civil Engineers, 2023, Japanese Journal of JSCE, 79(17) (17), n/a - n/a

  [Refereed]

  Scientific journal


• MULTIGENERATIONAL CONNECTIVITY ANALYSIS OF EELGRASS HABITATS IN THE SETO INLAND SEA BASED ON A MARKOV CHAIN

  Motoki UBARA, Yusuke UCHIYAMA, Taichi KOSAKO, Shinya HOSOKAWA

  Corresponding, Japan Society of Civil Engineers, 2023, Japanese Journal of JSCE, 79(17) (17), n/a - n/a

  [Refereed]

  Scientific journal


• TRANSPORT PROCESSES IN THE JAPAN SEA INVESTIGATED WITH PARTICLE TRACKING SIMULATIONS AND DRIFTER DATA

  Kazuhiro HARADA, Eiji MASUNAGA, Yusuke UCHIYAMA

  Japan Society of Civil Engineers, 2023, Japanese Journal of JSCE, 79(17) (17), n/a - n/a

  [Refereed]

  Scientific journal


• Identifying marine debris source position using adjoint marginal sensitivity method and stranded beach litter data in Singapore

  Hong Siang Gan, Shunsuke Kanao, Toru Sato, Klaus Hellgardt, Yusuke Uchiyama

  Last, Elsevier BV, Sep. 2022, Marine Pollution Bulletin, 182, 113997 - 113997, English

  [Refereed]

  Scientific journal


• Fate of river-derived microplastics from the South China Sea: Sources to surrounding seas, shores, and abysses

  Kosei Matsushita, Yusuke Uchiyama, Naru Takaura, Taichi Kosako

  Corresponding, Sep. 2022, Environmental Pollution, 308

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Seasonal variability of upper ocean primary production along the Kuroshio off Japan: Roles of eddy-driven nutrient transport

  Xu Zhang, Yusuke Uchiyama, Eiji Masunaga, Yota Suzue, Hidekatsu Yamazaki

  We assessed spatial and seasonal variabilities of eddy-driven vertical nutrient fluxes, which are essential for maintaining primary production in the upper ocean. A climatological model based on a Regional Oceanic Modeling System (Regional Oceanic Modeling System) coupled with a Nutrient Phytoplankton Zooplankton and Detritus (NPZD) biogeochemical model at a submesoscale eddy-permitting resolution was used to investigate the mechanisms driving such variabilities around the Kuroshio, off the coast of Japan. The model realistically reproduced the spatial segmentations in primary production on both sides of the Kuroshio path with a higher chlorophyll-a concentration on the northern side than the southern side. In winter, downward eddy-induced nitrate flux is predominantly provoked in the upstream Kuroshio region (KR), while upward nitrate fluxes prevail in the downstream Kuroshio Extension (KE) region, due to both shear and baroclinic instabilities. Baroclinic instability plays a crucial role in inducing seasonal variability, leading to enhancement (reduction) of the eddy flux in winter (summer), particularly in regions away from the Kuroshio axis. Furthermore, we found that the influence of the Izu-Ogasawara Ridge, located in the KR, on regional dynamics and resultant spatial variability of the biogeochemical response are mostly confined in the KR. The Kuroshio is less turbulent in the upstream of the ridge, while it becomes unstable to shed mesoscale eddies in laterally wider and vertically deeper regions downstream. Consequently, although the near-surface nitrate concentration is lower downstream, the upward eddy-driven nitrate flux is more effective in maintaining active primary production due to the shear and baroclinic instabilities in winter.

  Corresponding, Frontiers Media SA, Aug. 2022, Frontiers in Marine Science, 9, English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Modulation of submesoscale motions due to tides and a shallow ridge along the Kuroshio

  Eiji Masunaga, Yusuke Uchiyama, Xu Zhang, Waku Kimura, Taichi Kosako

  Aug. 2022, Deep-Sea Research Part I: Oceanographic Research Papers, 186

  Scientific journal


• NUMERICAL ANALYSIS ON MARINE MICROPLASTIC TRANSPORT IN HIROSHIMA BAY USING A ROMS-BASED LAGRANGIAN PARTICLE TRACKING MODEL

  Shoma HIKINO, Motoki UBARA, Yusuke UCHIYAMA, Taichi KOSAKO

  Corresponding, Japan Society of Civil Engineers, 2022, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 78(2) (2), I_925 - I_930

  Scientific journal


• WAVE EFFECTS ON LAGRANGIAN TRANSPORT AND DISPERSAL OF REEF CORAL LARVAE IN A NEARSHORE AREA

  Koki KATAOKA, Kimika TAKEYASU, Yusuke UCHIYAMA, Satoshi MITARAI

  Corresponding, Japan Society of Civil Engineers, 2022, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 78(2) (2), I_385 - I_390

  Scientific journal


• DEVELOPMENT OF A DIAGNOSTIC SEDIMENT TRANSPORT AND MORPHOLOGY MODEL: APPLICATION TO THE AKASHI STRAIT

  Motoki UBARA, Yusuke UCHIYAMA, Taichi KOSAKO

  Corresponding, Japan Society of Civil Engineers, 2022, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 78(2) (2), I_451 - I_456

  Scientific journal


• DEVELOPMENT OF AN EVALUATION SYSTEM FOR SUITABILITY OF OFFSHORE WIND FARM SITES AROUND JAPAN BASED ON A REGIONAL OCEAN CIRCULATION–BIOGEOCHEMICAL MODEL

  Toshitake TAMAI, Yusuke UCHIYAMA, Xu ZHANG, Eiji MASUNAGA, Kazuhiro TSUJI, Hidekatsu YAMAZAKI

  Corresponding, Japan Society of Civil Engineers, 2022, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 78(2) (2), I_1009 - I_1014

  Scientific journal


• Medium-Term Oceanic Transport of River-Derived Microplastics in the South China Sea Analyzed with a Particle Tracking Model

  Kosei Matsushita, Yusuke Uchiyama, Naru Takaura, Taichi Kosako

  Dec. 2021, IOP Conference Series: Earth and Environmental Science, 945(1) (1)

  International conference proceedings

  Link to Kobe Univ. Repository (Kernel)


• Sediment Transport and Associated Long-term Bathymetric Changes due to Tidal Currents in the Seto Inland Sea, Japan

  Motoki Ubara, Yusuke Uchiyama, Taichi Kosako

  Dec. 2021, IOP Conference Series: Earth and Environmental Science, 945(1) (1)

  International conference proceedings

  Link to Kobe Univ. Repository (Kernel)


• A modeling study on the oceanic dispersion and sedimentation of radionuclides off the coast of Fukushima

  Yuki Kamidaira, Yusuke Uchiyama, Hideyuki Kawamura, Takuya Kobayashi, Shigeyoshi Otosaka

  Elsevier BV, Nov. 2021, Journal of Environmental Radioactivity, 238-239, 106724 - 106724, English

  [Refereed]

  Scientific journal


• A storm-induced flood and associated nearshore dispersal of the river-derived suspended 137Cs

  Yusuke Uchiyama, Natsuki Tokunaga, Kohei Aduma, Yuki Kamidaira, Daisuke Tsumune, Toshiki Iwasaki, Masatoshi Yamada, Yutaka Tadeda, Takashi Ishimaru, Yukari Ito, Yutaka W. Watanabe, Ken Ikehara, Miho Fukuda, Yuichi Onda

  Accidental leakage of radionuclides from the Fukushima Nuclear Power Plant (FNPP1) took place in the aftermath of the catastrophic tsunamis associated with the Great East Japan Earthquake that occurred on March 11, 2011. Significant amount of radionuclides released into the atmosphere were reportedly transported and deposited on land located near FNPP1. The Niida River, Fukushima, Japan, has been recognized as a terrestrial source of highly contaminated suspended radiocesium adhering to sediment particles in the ocean through the river mouth as a result of hydrological processes. Remaining scientific questions include the oceanic dispersal and inventories of the sediments and suspended radiocesium in the ocean floor derived from the Niida River. Complementing limited in situ data, we developed a quadruple nested 3D ocean circulation and sediment transport model in an extremely high-resolution configuration to quantify the transport processes of the suspended radiocesium. Particularly, we investigated the storm and subsequent floods associated with Typhoon 201326 (Wipha) that passed off the Fukushima coast in October 2013, and subsequently promoted precipitation to a considerable extent and associated riverine freshwater discharge along with sediment outfluxes to the ocean. Using in situ bed sediment core data obtained from regions near the river mouth, we conducted a quantitative assessment of the accumulation and erosion of the sediments and explored the resultant suspended radiocesium distribution around the river mouth and nearshore areas along the Fukushima coast. We identified three major accumulative areas, near the river mouth within an area < 1 km, around the breakwaters in the north of the river mouth, and along the southern coastal area, while offshore and northward transports were minor. The present study clearly exhibits substantial retention of the land-derived radiocesium adsorbed to the sediments in the coastal areas, leading to possible long-term influences on the surrounding marine environment.

  Elsevier BV, Nov. 2021, Science of The Total Environment, 816, 151573 - 151573, English, International magazine

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• A Nearshore Oceanic Front Induced By Wave Streaming

  Peng Wang, James C. McWilliams, Yusuke Uchiyama

  Coastal fronts impact cross-shelf exchange of materials, such as plankton and nutrients, which are important to the ecosystems in continental shelves. Here using numerical simulation we demonstrate a nearshore front induced by wave streaming. Wave streaming is a bottom Eulerian current along the surface wave direction, and it is caused by the wave bottom dissipation. Wave streaming drives a Lagrangian overturning circulation in the inner shelf and pumps up deep and cold water into the overturning circulation. The water inside the overturning circulation is quickly mixed and cooled because of the wave streaming-enhanced viscosity. However, the offshore water outside the overturning circulation remains stratified and warmer. Hence, a front develops between the water inside and outside the overturning circulation. The front is unstable and generates submesoscale shelf eddies, which lead the offshore transport across the front. This study presents a new mechanism for coastal frontogenesis.

  American Meteorological Society, Apr. 2021, Journal of Physical Oceanography, English

  [Refereed]

  Scientific journal


• Identification of coral spawn source areas around Sekisei Lagoon for recovery and poleward habitat migration by using a particle-tracking model.

  Naoya Takeda, Motohiko Kashima, Sachika Odani, Yusuke Uchiyama, Yuki Kamidaira, Satoshi Mitarai

  A massive coral bleaching event occurred in 2016 in the interior of Japan's largest coral lagoon, the Sekisei Lagoon, located in the Kuroshio upstream region in southwestern Japan. Recovery of the coral lagoon will require the influx of coral spawn and larvae; therefore, it is important to identify and conserve source sites. A surface-particle-tracking simulation of coral spawn and larvae was used to identify source areas of coral spawn outside of the Sekisei Lagoon for potential recovery of the interior lagoon. The northern coastal zone of Iriomote Island, including Hatoma Island, was identified as a major source area. Hatoma Island was also identified as a key source for the Kuroshio downstream region and for aiding the poleward migration of coral habitat under ongoing global climate change, making it one of the most important source areas in the Nansei Archipelago.

  Mar. 2021, Scientific reports, 11(1) (1), 6963 - 6963, English, International magazine

  [Refereed]

  Scientific journal


• LARGE-SCALE LAGRANGIAN TRANSPORT OF MICROPLASTICS DERIVED FROM FOUR MAJOR RIVERS IN THE SOUTH CHINA SEA ANALIZED WITH A CLIMATOLOGICAL HYCOM-ROMS MODEL

  Kosei MATSUSHITA, Yusuke UCHIYAMA, Naru TAKAURA, Taichi KOSAKO

  Corresponding, Japan Society of Civil Engineers, 2021, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 77(2) (2), I_1003 - I_1008

  [Refereed]

  Scientific journal


• THREE-DIMENTIONAL CONNECTIVITY OF CORAL LARVAE IN REEF AREAS ON THE NORTHWEST COAST OF OKINAWA MAIN ISLAND, JAPAN

  Kimika TAKEYASU, Yusuke UCHIYAMA, Xu ZHANG, Kosei MATSUSHITA, Satoshi MITARAI

  Corresponding, Japan Society of Civil Engineers, 2021, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 77(2) (2), I_883 - I_888

  [Refereed]

  Scientific journal


• DISCIPLINAL COUPLING OF A HIGH-RESOLUTION OCEAN MODEL AND MARINE GEOLOGY FOR A MILLENNIUM-SCALE MORPHODYNAMIC ANALYSIS IN THE EASTERN SETO INLAND SEA

  Motoki UBARA, Yusuke UCHIYAMA, Taichi KOSAKO

  In order to quantify the formation mechanism of seafloor topography on a timescale of millennia in the eastern Seto Inland Sea, the Regional Ocean Modeling System (ROMS) was used to evaluate hydraulic quantities and diagnose suspended sediment transport, coupled with the marine geological discipline. Overall morphodynamics was well captured by the diagnostic model, in which the intensity of bottom shear stress associated with prevailing tidal currents and the divergence of bottom residual currents explain the formations of caldrons and sandbanks. Nevertheless, inconsistency between the background hydrodynamics and the resultant topographies were found in multiple places around tidal straits. We showed that marine geological data was quite useful to fulfil a comprehensive description of, e.g., unexplained zonal differences of sandbank formation relative to Akashi Strait through the considerations of coastal transgression.

  Corresponding, Japan Society of Civil Engineers, 2021, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 77(2) (2), I_169 - I_174, Japanese

  [Refereed]

  Scientific journal


• DEVELOPMENT OF A DATA ASSIMILATION SYSTEM BASED ON ENSEMBLE KALMAN FILTER AND ITS APPLICATION TO THE SETO INLAND SEA

  Hongxin WANG, Kenta KUROSAWA, Yusuke UCHIYAMA

  Corresponding, Japan Society of Civil Engineers, 2021, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 77(2) (2), I_385 - I_390

  [Refereed]

  Scientific journal


• TRANSPORT PROCESSES AROUND SAGAMI BAY AND SURUGA BAY USING A PARTICLE TRACKING MODEL

  Takayoshi INOUE, Eiji MASUNAGA, Taichi KOSAKO, Xu ZHANG, Yusuke UCHIYAMA

  Japan Society of Civil Engineers, 2021, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 77(2) (2), I_373 - I_378

  [Refereed]

  Scientific journal


• WATER MASS CLASSIFICATION OFF THE EAST COAST OF JAPAN MAINLAND USING A REGIONAL OCEANIC SIMULATOR

  Masashi IKEDA, Eiji MASUNAGA, Yota SUZUE, Sachihiko ITOH, Yusuke UCHIYAMA

  Japan Society of Civil Engineers, 2021, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 77(2) (2), I_379 - I_384

  [Refereed]

  Scientific journal


• Effects of Wave Streaming and Wave Variations on Nearshore Wave-Driven Circulation

  Peng Wang, James C. McWilliams, Yusuke Uchiyama, Mickaël D. Chekroun, Daling Li Yi

  Wave streaming is a near-bottom mean current induced by the bottom drag on surface gravity waves. Wave variations include the variations in wave heights, periods, and directions. Here we use numerical simulations to study the effects of wave streaming and wave variations on the circulation that is driven by incident surface waves. Wave streaming induces an inner-shelf Lagrangian overturning circulation, which links the inner shelf with the surf zone. Wave variations cause alongshore-variable wave breaking that produces surf eddies; however, such eddies can be suppressed by wave streaming. Moreover, with passive tracers we show that wave streaming and wave variations together enhance the cross-shelf material transport.

  American Meteorological Society, Oct. 2020, Journal of Physical Oceanography, 50(10) (10), 3025 - 3041, English

  [Refereed]

  Scientific journal


• High wave coniditions due to typhoons measured at an offshore observation tower

  Baba, Y, Kubo, T, Mori, N, Watanabe, Y, Yamada, T, Saruwatari, A, Otsuka, J, Uchiyama, Y, Ninomiya, J, Shimura, T

  Sep. 2020, Proc. 22nd IAHR-APD Congress, 2-4-4 - 2-4-4

  [Refereed]

  International conference proceedings


• Topographic and coastline influences on surf Eddies

  Çiğdem Akan, James C. McWilliams, Yusuke Uchiyama

  Mar. 2020, Ocean Modelling, 147

  [Refereed]

  Scientific journal


• THREE-DIMENSIONAL BASIN-SCALE OCEANIC TRANSPORT OF RIVER-DERIVED MICROPLASTICS IN THE SOUTH CHINA SEA

  Kosei MATSUSHITA, Yusuke UCHIYAMA, Naru TAKAURA, Taichi KOSAKO

  Corresponding, Japan Society of Civil Engineers, 2020, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 76(2) (2), I_979 - I_984

  [Refereed]

  Scientific journal


• GENERATION MECHANISM OF TIDALLY-DRIVEN WHIRLPOOLS AT NARUTO STRAIT, JAPAN

  Yusuke UCHIYAMA, Xu ZHANG, Shota YANASE

  Japan Society of Civil Engineers, 2020, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 76(2) (2), I_97 - I_102

  [Refereed]

  Scientific journal


• MASS TRANSPORT TOWARD COASTAL REGIONS FROM THE KUROSHIO INVESTIGATED WITH A PARTICLE TRACKING MODEL

  Eiji MASUNAGA, Waku KIMURA, Taichi KOSAKO, Xu ZHANG, Yusuke UCHIYAMA

  Japan Society of Civil Engineers, 2020, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 76(2) (2), I_91 - I_96

  [Refereed]

  Scientific journal


• Development of a numerical marine weather routing system for coastal and marginal seas using regional oceanic and atmospheric simulations

  Kenta Kurosawa, Yusuke Uchiyama, Taichi Kosako

  Jan. 2020, Ocean Engineering, 195

  [Refereed]

  Scientific journal


• Strong Internal Waves Generated by the Interaction of the Kuroshio and Tides over a Shallow Ridge

  Eiji Masunaga, Yusuke Uchiyama, Hidekatsu Yamazaki

  American Meteorological Society, Nov. 2019, Journal of Physical Oceanography, 49(11) (11), 2917 - 2934, English

  [Refereed]

  Scientific journal


• REVISING WAVE INDUCED TURBULENT MIXING AND ITS IMPACT ON TROPICAL CYCLONE

  Masashi TAKAGI, Nobuhito MORI, Junichi NINOMIYA, Tomoya SHIMURA, Yusuke UCHIYAMA, Yasuyuki BABA, Hideaki MIZUTANI, Teruhiro KUBO, Yasunori WATANABE, Junichi OTSUKA, Tomohito YAMADA, Ayumi SARUWATARI

  Japan Society of Civil Engineers, Nov. 2019, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 75(2) (2), I_61 - I_66, Japanese

  [Refereed]

  Scientific journal


• ULTRASONIC BACKSCATTER MODEL ESTIMATING HEAT TRANSFER BY BUBBLE CLOUD IN THE OCEAN

  Ayumi SARUWATARI, Junichi OTSUKA, Yasuyuki BABA, Teruhiro KUBO, Hideaki MIZUTANI, Tomoya SHIMURA, Junichi NINOMIYA, Tomohito YAMADA, Yusuke UCHIYAMA, Nobuhito MORI, Yasunori WATANABE

  Japan Society of Civil Engineers, Nov. 2019, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 75(2) (2), I_67 - I_72, Japanese

  [Refereed]

  Scientific journal


• HIGH WAVES DUE TO TYPHOONS IN THE SUMMER OF 2018 OBSERVED AT AN OBSERVATION TOWER

  Yasuyuki BABA, Teruhiro KUBO, Nobuhito MORI, Yasunori WATANABE, Tomohito YAMADA, Ayumi SARUWATARI, Junichi OTSUKA, Yusuke UCHIYAMA, Junichi NINOMIYA

  Japan Society of Civil Engineers, Nov. 2019, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 75(2) (2), I_271 - I_276, Japanese

  [Refereed]

  Scientific journal


• A review of ocean forces interaction model with offshore structures near the free surface

  Zafarullah Nizamani, Akihiko Nakayama, Yusuke Uchiyama, Tey Kim Hai

  Sep. 2019, AIP Conference Proceedings, 2157

  [Refereed]

  International conference proceedings


• Residual circulations and associated water mass transport in the South China sea analyzed with a coupled HYCOM-ROMS downscaling ocean model

  Yusuke Uchiyama, Naru Takaura, Nobue Okada, Akihiko Nakayama

  Sep. 2019, AIP Conference Proceedings, 2157

  [Refereed]

  International conference proceedings

  Link to Kobe Univ. Repository (Kernel)


• A three-dimensional numerical assessment on the influences of treated sewage effluent on an adjacent seaweed farm with different discharge operations

  Xu Zhang, Yusuke Uchiyama, Akihiko Nakayama

  Corresponding, Sep. 2019, AIP Conference Proceedings, 2157

  [Refereed]

  International conference proceedings

  Link to Kobe Univ. Repository (Kernel)


• A post-disaster assessment on a storm-induced flood and associated coastal dispersal of the river-derived suspended radiocesium originated from the Fukushima nuclear accident

  Yusuke Uchiyama, Natsuki Tokunaga

  Sep. 2019, AIP Conference Proceedings, 2157

  [Refereed]

  International conference proceedings

  Link to Kobe Univ. Repository (Kernel)


• Development of regional downscaling capability in STEAMER ocean prediction system based on multi-nested ROMS model

  Yuki Kamidaira, Hideyuki Kawamura, Takuya Kobayashi, Yusuke Uchiyama

  Aug. 2019, Journal of Nuclear Science and Technology, 56(8) (8), 752 - 763

  [Refereed]

  Scientific journal


• On relaxation of the influences of treated sewage effluent on an adjacent seaweed farm in a tidal strait

  Xu Zhang, Yusuke Uchiyama, Akihiko Nakayama

  Jul. 2019, Marine Pollution Bulletin, 144, 265 - 274

  [Refereed]

  Scientific journal


• RAINFALL OBSERVATION IN THE COASTAL AREA WITH OPTICAL DISDROMETERS IN THE SUMMER OF 2013

  岡地寛季, 山田朋人, 渡部靖憲, 猿渡亜由未, 大塚淳一, 森信人, 馬場康之, 久保輝広, 二宮順一, 内山雄介, 水谷英郎

  公益社団法人 土木学会, 2019, 土木学会論文集 G(環境)(Web), 75(5) (5), I_41 - I_46, Japanese

  [Refereed]

  Scientific journal


• COASTAL TRANSPORT OF SEDIMENTS AND SUSPENDED RADIOCESIUM IN THE FUKUSHIMA COAST DUE TO A TYPHOON-INDUCED FLOOD EVENT

  Natsuki TOKUNAGA, Yusuke UCHIYAMA, Daisuke TSUMUNE, Masatoshi YAMADA, Yutaka TATEDA, Takashi ISHIMARU, Yukari ITO, Yutaka WATANABE, Ken IKEHARA, Miho FUKUDA

  Corresponding, Japan Society of Civil Engineers, 2019, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 75(2) (2), I_667 - I_672

  [Refereed]

  Scientific journal


• FORCING EVALUATION FOR OFFSHORE PLATFORMS IN THE SOUTH CHINA SEA USING A HYCOM-ROMS DOWNSCALING OCEAN MODEL

  Naru TAKAURA, Yusuke UCHIYAMA, Nizamani ZAFARULLAH, Akihiko NAKAYAMA

  Corresponding, Japan Society of Civil Engineers, 2019, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 75(2) (2), I_979 - I_984

  [Refereed]

  Scientific journal


• TRANSPORT PROCESSES AROUND THE IZU-CHAIN ISLANDS INVESTIGATED WITH A LAGRANGIAN PARTICLE TRACKING MODEL

  Waku KIMURA, Eiji MASUNAGA, Taichi KOSAKO, Yusuke UCHIYAMA

  Japan Society of Civil Engineers, 2019, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 75(2) (2), I_211 - I_216

  [Refereed]

  Scientific journal


• FATES AND DYNAMICAL ROLES OF PINCH-OFF MESOSCALE EDDIES FROM THE KUROSHIO EXTENSION JET ANALYZED WITH THE ARMOR3D DIAGNOSIS

  Nobue OKADA, Yusuke UCHIYAMA

  Corresponding, Japan Society of Civil Engineers, 2019, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 75(2) (2), I_199 - I_204

  [Refereed]

  Scientific journal


• Surface gravity and capillary waves

  Yusuke Uchiyama

  Jan. 2019, Encyclopedia of Ocean Sciences, 672 - 681

  [Refereed]

  In book


• RAINFALL OBSERVATION IN THE COASTAL AREA WITH OPTICAL DISDROMETERS IN THE SUMMER OF 2013

  岡地 寛季, 山田 朋人, 渡部 靖憲, 猿渡 亜由未, 大塚 淳一, 森 信人, 馬場 康之, 久保 輝広, 二宮 順一, 内山 雄介, 水谷 英郎

  土木学会, 2019, 地球環境研究論文集 : 地球環境シンポジウム, 27, 41 - 46, Japanese

  [Refereed]


• Multiple-Scale Variations of Wind-Generated Waves in the Southern California Bight

  Yuhan Cao, Changming Dong, Yusuke Uchiyama, Jin Wang, Xunqiang Yin

  Dec. 2018, Journal of Geophysical Research: Oceans, 123(12) (12), 9340 - 9356, English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Influences of the Kuroshio on Interisland Remote Connectivity of Corals Across the Nansei Archipelago in the East China Sea

  Yusuke Uchiyama, Sachika Odani, Motohiko Kashima, Yuki Kamidaira, Satoshi Mitarai

  Dec. 2018, Journal of Geophysical Research: Oceans, 123(12) (12), 9245 - 9265, English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• 半閉鎖性内湾における海水交換特性の季節変化とその形成メカニズムについて

  Okada, N, Uchiyama, Y, Tada, H, Endo, S, Baba, Y, Mizutani, H, Kubo, T, Mori, N, Watanabe, Y, Ohtsuka, J, Yamada, T, Saruwatari, A, Ninomiya, J

  Nov. 2018, 土木学会論文集B2（海岸工学）, 74(2) (2), I_667─I_672, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• ラグランジュ粒子追跡による沖縄本島周辺海域における海洋生態系ネットワーク構造の高解像度数値解析

  Uchiyama, Y, Miyagawa, T, Odani, S, Kamidaira, Y

  Nov. 2018, 土木学会論文集B2（海岸工学）, 74(2) (2), I_1291─I_1296, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• フェッチ制限下の風波砕波に伴う海面表層の応答

  Saruwatari, A, Sakagawa, R, Ohtsuka, J, Baba, Y, Kubo, T, Mizutani, H, Ninomiya, J, Yamada, T, Uchiyama, Y, Mori, N, Watanabe, Y

  Nov. 2018, 土木学会論文集B2（海岸工学）, 74(2) (2), I_67─I_72, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• HYCOM-ROMSダウンスケーリング海洋流動モデルの開発と南シナ海周辺海域への応用

  Uchiyama, Y, Sengo, N, Kurosawa, K

  Nov. 2018, 土木学会論文集B2（海岸工学）, 74(2) (2), I_625─I_630, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Robustness of nearshore vortices

  James C. McWilliams, Cigdem Akan, Yusuke Uchiyama

  Sep. 2018, Journal of Fluid Mechanics, 850(R2) (R2), R21 - R212, English

  [Refereed]

  Scientific journal


• Development of a coupled HYCOM-ROMS downscaling ocean modeling system and its application to the South China Sea

  Uchiyama, Y, Sengo, N, Kurosawa, K, Nakayama, A

  Sep. 2018, Proc. 13th International Conference on Hydrodynamics (ICHD2018), 358–363, English

  [Refereed]

  International conference proceedings


• A Lagrangian analysis on coastal dispersal of larvae and spawn around Okinawa Island, Japan

  Uchiyama, Y, Miyagawa, T, Odani, S, Mitarai, S

  Sep. 2018, Proc. 13th International Conference on Hydrodynamics (ICHD2018), 182–188, English

  [Refereed]

  International conference proceedings


• Mesoscale Reproducibility in Regional Ocean Modelling with a Three-Dimensional Stratification Estimate Based on Aviso-Argo Data

  Yusuke Uchiyama, Ryosuke Kanki, Akiko Takano, Hidekatsu Yamazaki, Yasumasa Miyazawa

  Aug. 2018, Atmosphere - Ocean, 56(4) (4), 212 - 229, English

  [Refereed]

  Scientific journal


• Residual effects of treated effluent diversion on a seaweed farm in a tidal strait using a multi-nested high-resolution 3-D circulation-dispersal model

  Yusuke Uchiyama, Xu Zhang, Yota Suzue, Taichi Kosako, Yasumasa Miyazawa, Akihiko Nakayama

  May 2018, Marine Pollution Bulletin, 130, 40 - 54, English

  [Refereed]

  Scientific journal


• Submesoscale Mixing on Initial Dilution of Radionuclides Released From the Fukushima Daiichi Nuclear Power Plant

  Yuki Kamidaira, Yusuke Uchiyama, Hideyuki Kawamura, Takuya Kobayashi, Akiko Furuno

  Apr. 2018, Journal of Geophysical Research: Oceans, 123(4) (4), 2808 - 2828, English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Dynamics of Internal Tides Over a Shallow Ridge Investigated With a High-Resolution Downscaling Regional Ocean Model

  Eiji Masunaga, Yusuke Uchiyama, Yota Suzue, Hidekatsu Yamazaki

  Apr. 2018, Geophysical Research Letters, 45(8) (8), 3550 - 3558, English

  [Refereed]

  Scientific journal


• Impacts of two super typhoons on the Kuroshio and marginal seas on the Pacific coast of Japan

  Hiroaki Tada, Yusuke Uchiyama, Eiji Masunaga

  Feb. 2018, Deep-Sea Research Part I: Oceanographic Research Papers, 132, 80 - 93, English

  [Refereed]

  Scientific journal


• FRESHWATER DISCHARGE FROM SMALL RIVER BASINS AND ITS IMPACTS ON REPRODUCIBILITY OF COASTAL HYDRODYNAMIC SIMULATION IN SETO INLAND SEA

  HIGASHI Hironori, SATO Yoshinobu, YOSHINARI Hiroshi, MAKI Hideaki, KOSHIKAWA Hiroshi, KANAYA Gen, UCHIYAMA Yusuke

   Freshwater discharge from watersheds is one of the important boundary conditions for coastal hydrodynamic simulations, but its available observations are very limited at small rivers. The present study developed a hydrological discharge and coastal hydrodynamic model with high resolution for Seto Inland Sea and its all river basins. Using this model, we evaluated freshwater discharge to the sea for the period of 2007–2015 and investigated impacts of small rivers on reproducibility of coastal hydrodynamic simulation. The hydrological simulation indicated that total annual amount of freshwater discharge to the sea was 53.0 km³/yr; 68% was from 21 major rivers and 32% was from small rivers. The coastal hydrodynamic simulation overestimated sea surface salinity if the freshwater discharge only from the major rivers was given; reproduced well if all rivers were considered.

  Japan Society of Civil Engineers, 2018, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 74(2) (2), I_1135 - I_1140, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Submesoscale coherent structures on the continental shelf

  Daniel P. Dauhajre, James C. McWilliams, Yusuke Uchiyama

  Dec. 2017, Journal of Physical Oceanography, 47(12) (12), 2949 - 2976, English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• 琉球諸島周辺海域における生態系ネットワーク形成に対する黒潮の影響について

  Odani, S, Uchiyama, Y, Kashima, M, Kamidaira, Y, Mitarai, S

   Ryukyu Islands in the East China Sea are in a subtropical climate, hosting desirable environment for abundant coral ecosystem. It is anticipated that the Kuroshio and associated eddy mixing promote the transport and dispersal of coral spawn and larvae across the islands, whereas the area has suffered from coral bleaching in the recent decades. Toward optimal preservation and protection of the coral habitats around Ryukyu Island, we conduct a double nested high-resolution synoptic ocean modeling using ROMS with grid spacing down to 600 m coupled with an offline Lagrangian particle tracking model. The modeled dispersal of coral spawn and larvae released from 18 major islands and lagoons are examined to quantify connectivity using Lagrangian probability density functions (PDFs) of the Lagrangian particles among Ryukyu Islands. The PDF analyses suggest that the particles mostly remain near the released areas, while about 10% of the particles are entrained in the Kuroshio to travel long distance, contributing to inter-island connectivity. Some of these particles are further transported northeastward, and then partially trapped by the Kuroshio Counter Current formed between the Kuroshio and the islands to approach Okinawa Main Island. We reveal that eastward current occurred in the south the Sekisei Lagoon shortly after the releases significantly suppresses the entrainment and the resultant long-distance transport.

  Japan Society of Civil Engineers, Nov. 2017, 土木学会論文集B2（海岸工学）, 73(2) (2), I_1315 - I_1320, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• 台風201326号出水に伴う新田川起源懸濁態放射性核種の沿岸域でのインベントリ解析

  Uchiyama, Y, Aduma, K, Odani, S, Iwasaki, T, Tsumune, D, Kamidaira, Y, Shimizu, Y, Onda, Y

   Niida River is well know to supply highly contaminated suspended ¹³⁷Cs originated from the Fukushima Nuclear Power Plant to the ocean. We examine the oceanic dispersal and inventories of the sediments and suspended ¹³⁷Cs in the ocean floor derived from Niida River, using the quadraple nested JCOPE2-ROMS 3D circulation model in a very high resolution configuration, coupled with a 3D multi-class sediment transport model, the iRIC-Nays 2DH river sediment model, the SWAN spectral wave model, and a static ¹³⁷Cs absorption model. We focus on the storm and flood event associated with Typhoon 201326 (Wipha) passed off the Fukushima Coast, which provoked an enomous amount of riverine fluxes, to quantitatively assess the accumulation and erosion of the sediments and resultant suspended ¹³⁷Cs inventories around the river mouth and nearshore areas.

  Japan Society of Civil Engineers, Nov. 2017, 土木学会論文集B2（海岸工学）, 73(2) (2), I_685 - I_690, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• 黒潮周辺海域における海洋変動に対する一次生産応答の季節変動特性について

  Suzue, Y, Uchiyama, Y, Yamazaki, H

   The Kuroshio off Japan is accompanied by vigorous eddy and frontal activity both on meso- and submesoscales, which significantly affects the biogeochemical productivity in the upper ocean. We examine the seasonal variability of eddy-induced nitrate transport and resultant biogeochemical response around the Kuroshio using a climatological ROMS-NPZD model. A nitrogen budget analysis indicates that nitrogen exists mostly in the phyto- and zooplankton compartments in both the Kuroshio and Kuroshio Extension regions during the sping bloom. The increased zooplankton further enriches detritus that settles down by about 100 m, leading to an increase of ammonium below the mixed layer. In winter, eddy-induced nitrate transport is enhanced in the region about 1° away from the Kuroshio axis. The baroclinic instability due to the surface cooling in winter generates meso- and submesoscale eddies and substantially promotes eddy-induced vertical nitrate transport.

  Japan Society of Civil Engineers, Nov. 2017, 土木学会論文集B2（海岸工学）, 73(2) (2), I_457 - I_462, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• 黒潮と内部波が影響する伊豆諸島周辺海域における流動場の解明

  Masunaga, E, Suzue, Y, Uchiyama, Y, Yamazaki, H

   Regional Oceanic Numerical simulations using ROMS with tidal forcing were conducted to investigate tidally induced internal waves (internal tides) in the vicinity of the Izu-chain Islands. The tides enhance the enrgy flux of internal waves by about 10 times as large around the islands. Therefore, in the study region, the internal waves are considerably enargized by the tidal forcing. Although the total and baroclinic components of kinetic eneygy increase due to the tides, the barotropic kinetic energy component decreased by the tidal forcing. The internal waves accompanied by strong baroclinic flows largely contribute to the flow compared to the currents due to winds and the Kuroshio. The numerical simulateons also revealed the enhanced eddy motiions due to the tidal forcing, suggesting that the tides contiribute to lateral mixing or transports via meso- and submesoscale eddies.

  Japan Society of Civil Engineers, Nov. 2017, 土木学会論文集B2（海岸工学）, 73(2) (2), I_451 - I_456, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• 衛星海面高度データを用いた北太平洋における中規模渦の発生伝播特性の解析

  Uchiyama, Y, Okada, N, Kurosawa, K

   Kinematics, dynamics, and statistical nature of mesoscale oceanic eddies and their effects on the Kuroshio are investigated using a velocity-based automated eddy detection and tracking algorithm proposed by Nencioli et al. (2010) to apply to a 20-year long satellite altimetry dataset provided by AVISO for the entire North Pacific (NP) basin. In the NP, barotropic instability associated primarily with topographic shear and frontal baroclinic instability concurrently promote generation of mesoscale eddies. The eddy sizes and magnitudes of relative and absolute vorticity are inversely correlated, which is well explained by inertial instability and potential vorticity conservation, in particular in the Kuroshio Extension region (KE) and Subtropical Zonal Band (SZB), where eddy kinetic energy is highest in the NP. Mesoscale eddies generally propagate westward as non-dispersive, first-mode baroclinic Rossby waves in the SZB and U.S. West Coast, according to a frequenc-ywavenumber spectral analysis. In contrast, the eddies in the KE are rather multi-directional with notable eastward propagation due to eastward eddy shedding from the eastward-drifting Kuroshio. Furthermore, we show two selected examples, in which mesoscale eddies collided with the Kuroshio to provoke and suppress meander of its path off the continental shelf off Japan.

  Japan Society of Civil Engineers, Nov. 2017, 土木学会論文集B2（海岸工学）, 73(2) (2), I_1429 - I_1437, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Mesoscale reproducibility in regional ocean modeling with a 3-D stratification estimate based on Aviso-Argo data

  Uchiyama, Y, Kanki, R, Takano, A, Yamazaki, H, Miyazawa, Y

  Nov. 2017, Atmosphere-Ocean, 55, 1 - 18, English

  [Refereed]

  Scientific journal


• 3次元変分法を用いた瀬戸内海流動再解析・予報モデルの高精度化

  Kurosawa, K, Uchiyama, Y, Miyoshi, T

   Ocean data assimilation (DA) has widely been used for various engineering purposes including monitoring, forecast, and port operations. However, in semi-enclosed estuaries such as the Seto Inland Sea (SIS), Japan, DA has rarely been adapted because satellite data and Argo floats are desperatively unavailable, albeit being essential to successful oceanic predictions. In the present study, we develop a DA system toward rigorous predictions optimal for relatively small coastal and estuarine settings. The system consists of a three-dimensional variational (3DVAR) assimilation scheme being made compatible with ROMS using an in-situ dataset available for the SIS. The DA system significantly improves the reproducibility of water temperature and salinity fields from those without DA. We show an evidence that detailed terrestrial freshwater discharge data is inevitable for more accurate salinity predictions in the estuary.

  Japan Society of Civil Engineers, Nov. 2017, 土木学会論文集B2（海岸工学）, 73(2) (2), I_1663 - I_1668, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Eddy-induced transport of the Kuroshio warm water around the Ryukyu Islands in the East China Sea

  Yuki Kamidaira, Yusuke Uchiyama, Satoshi Mitarai

  Jul. 2017, CONTINENTAL SHELF RESEARCH, 143, 206 - 218, English

  [Refereed]

  Scientific journal


• Three-dimensional transient rip currents: Bathymetric excitation of low-frequency intrinsic variability

  Yusuke Uchiyama, James C. McWilliams, Cigdem Akan

  Jul. 2017, JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 122(7) (7), 5826 - 5849, English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Eddy-induced transport of the Kuroshio warm water around the Ryukyu Islands in the East China Sea

  Yuki Kamidaira, Yusuke Uchiyama, Satoshi Mitarai

  Jul. 2017, CONTINENTAL SHELF RESEARCH, 143, 206 - 218, English

  [Refereed]

  Scientific journal


• Eddy-driven nutrient transport and associated upper-ocean primary production along the Kuroshio

  Yusuke Uchiyama, Yota Suzue, Hidekatsu Yamazaki

  Jun. 2017, JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 122(6) (6), 5046 - 5062, English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• 放射性物質の分散シミュレーションに影響を及ぼす沿海域海況変動過程とその再現性

  Masumoto, Y, Tsumune, D, Guo, X, Uchiyama, Y, Miyazawa, Y

  日本海洋学会沿岸海洋研究部会, Feb. 2017, 沿岸海洋研究, 54(2) (2), 151 - 157, Japanese

  [Refereed][Invited]

  Scientific journal


• マルチクラス懸濁質輸送モデルを用いた福島沿岸域における河川由来懸濁質および懸濁態放射性核種の海洋分散について

  Uchiyama, Y

  日本海洋学会沿岸海洋研究部会, Feb. 2017, 沿岸海洋研究, 54(2) (2), 159 - 172, Japanese

  [Refereed][Invited]

  Scientific journal


• 瀬戸内海および遠州灘沿岸域における陸域起源物質分散の季節変動特性について

  Uchiyama, Y, Suzue, Y, Kosako, T

  Jan. 2017, 土木学会論文集B1（水工学）, 72(4) (4), I_949 - I_954, Japanese

  [Refereed]

  Scientific journal


• Upper-ocean Dynamic Water-exchange at the Entrance of a Semi-enclose Bay under Stratified and unstratified Conditions

  Uchiyama, Y, Yoshiki, T, Tada, H, Baba,Y, Mizutani,H, Kubo, T, Mori, N, Saruwatari, A, Otsuka, J, Ninomiya,J, Watanabe, Y, Yamada, T

  For rigorious description of upper ocean dynamics and resultant volume transport at the mouth of Tanabe Bay, Wakayama, Japan, a comprehensive field campaign was conducted from summer to fall of 2015. The vertical structure of transient dynamics in the surface boundary layer and consequent water exchange at the mouth are characterized by high-frequency variability peaked at around the semi-diurnal period as well as in the lower-frequency subtidal band centered at 3 day period, consistent with the previous modeling study. A spectral coherence analysis indicates that near-surface currents are mainly driven by wind stress peaked at the diurnal frequency, whereas subsurface currents fluctuate rather by semi-diurnal internal tides. The upper ocean cools down gradually, corresponding to seasonal transition from summer to fall condition. However, an abrupt cooling event is observed albeit in a calm local forcing condition where an offshore subtidal cold water intrusion induced remotely by the fluctuating Kuroshio path plays an essential role.

  土木学会 = Japan Society of Civil Engineers, Nov. 2016, 土木学会論文集B2（海岸工学）, 72(2) (2), I_493 - I_498, Japanese

  [Refereed]

  Scientific journal


• 福島県沖海域を対象とした海洋拡散予測システムの開発と検証

  Kamidaira, Y, Kawamura, H, Kobayashi, T, Uchiyama, Y

   A downscaling oceanic dispersal modeling system has been developed. The system consists of double nested ROMS embedded in the MOVE assimilative reanalysis product and oceanic radionuclides dispersion model SEA-GEARN-FDM. The developed submesoscale eddy-resolving model is applied to reanalyses of the Fukushima accident occurred in March 2011. Model validations with satellite and in-situ data agreed well. The finest resolution model performed well between three models with different grid resolutions, suggesting that submesoscale eddies and associated vertical flows in the upper layer are substantial to three-dimensional behavior of the radionuclide. A diagnostic vertical ¹³⁷Cs flux analysis demonstrates that ageostrophic secondary circulations induced by submesoscale eddies promote seasonaly-varying subduction of the ¹³⁷Cs enhanced in spring, namely, immediately after the accident.

  Japan Society of Civil Engineers, Nov. 2016, 土木学会論文集B2（海岸工学）, 72(2) (2), I_451 - I_456, Japanese

  [Refereed]

  Scientific journal


• 長期高解像度再解析に基づく瀬戸内海内部流動と幼稚仔分散過程の形成メカニズムに関する研究

  Kosako, T, Uchiyama, Y, Mitarai, S

  Nov. 2016, 土木学会論文集B2（海岸工学）, 72(2) (2), I_1273 - I_1278, Japanese

  [Refereed]

  Scientific journal


• 出水イベントに伴う福島新田川河口周辺海域における懸濁態放射性核種の海洋分散について

  Yamanishi, T, Uchiyama, Y, Iwasaki, T, Shimizu, Y, Tsumune, D, Misumi, K, Onda, Y

   We examine oceanic dispersal of the iRIC-Nays2DH-evaluated sediment and suspended ¹³⁷Cs influxes from Niida River, Fukushima, with a particular attention to the first flood event in late May of 2011 after the Fukushima nuclear accident. Alongshore suspended ¹³⁷Cs transport occurs assymetrically, comprising storm-driven southward transport confined in the shallow area due to shoreward Ekman transport associated with strong northerly wind, followed by northwestward widespread transport under mild southerly wind condition. About 70 % of the Niida River-derived suspended ¹³⁷Cs remains near the mouth for 20 days after the flood event. Nevertheless, our model results as well as an observation suggest that the area is dominated by erosion as for high bed shear stress all the time, thus suspended radionuclides are redistributed to dissipate away in long term.

  Japan Society of Civil Engineers, Nov. 2016, 土木学会論文集B2（海岸工学）, 72(2) (2), I_757 - I_762, Japanese

  [Refereed]

  Scientific journal


• 四国・紀伊半島沖における台風通過に伴う黒潮の流動構造変化について

  Tada, H, Uchiyama, Y

   A submesoscale eddy-permitting oceanic reanalysis is carried out with exploiting the JCOPE2-ROMS downscaling system forced by the JMA GPV-MSM atmospheric reanalysis with a particular attention to the two consecutive super typhoons Phanfone and Vongfong in the fall 2014. On the Pacific side of Japan off Shikoku Island, the Kuroshio main body oscillates horizontally and vertically upon collisions with near-inertial internal gravity waves maintained by inertial resonance in the mixed layer, followed by substantial alteration of the Kuroshio path in the downstream region. A velocity rotary spectrum extracts a distinct peak in the near-inertial frequency band on the offshore side of the Kuroshio with clockwise rotation due to near-inertial oscillations caused by the typhoons. On the coastal side, it peaks at around periods of about 3 days with counter-clockwise rotation, which correspond to the shedding frequency of mesoscale eddies released from Cape Ashizuri. These eddies are enhanced by the typhoons to promote oscillations of the Kuroshio axis at around the 3-day period.

  Japan Society of Civil Engineers, Nov. 2016, 土木学会論文集B2（海岸工学）, 72(2) (2), I_457 - I_462, Japanese

  [Refereed]

  Scientific journal


• 黒潮暖水波及に伴う沖縄本島周辺海域における非対称海洋構造の形成機構

  Uchiyama, Y, Odani, S, Yamanishi, T, Kamidaira, Y, Mitarai, S

   Okinawa Island is located in the subtropical region of Japan, hosting ecologically abundant coral reefs even though they lie at the northernmost extreme of the habitable region. The island is situated on the ridge of Ryukyu Arc between East China Sea (ECS) and Ryukyu Trench (RT). The coral ecosystem in the west coast of the island is maintained by persistent intrusions of Kuroshio warm water. These factors lead to oceanic asymmetry between the both sides of the island. In this study, a triple nested downscaling ocean model based on ROMS is configured to examine the asymmetric oceanic structure around the island. The tidal harmonic and eddy kinetic energy analyses around the island clearly suggest that the southernmost area of the island, where Tokashiki strait (TS) lies between Okinawa Island and Tokashiki Island, plays a substantial role in controlling the asymmetric oceanic responses. The evaluated meridional volume flux normal to TS indicates seasonal variability with prominent ECS to RT transport in spring. The transport along TS is highly correlated with the volume transport of the southwestward current formed between the Kuroshio and the island, which is often referred to as the Kuroshio Counter Current (KCC). Surface vorticity indicates that the KCC consists of clockwise-rotating, anti-cyclonic mesoscale eddies. Relaxation of surface cooling and shallowing the mixed-layer depth occurred from winter to spring result in attenuating submesoscale eddies and promoting emergence of mesoscale eddies.

  Japan Society of Civil Engineers, Nov. 2016, 土木学会論文集B2（海岸工学）, 72(2) (2), I_481 - I_486, Japanese

  [Refereed]

  Scientific journal


• 現地観測に基づく水温躍層の破壊と鉛直混合に関する研究

  Kubo, S, Ninomiya, J, Mori, N, Baba, Y, Mizutani, H, Kubo, T, Uchiyama, Y, Watanabe, Y, Yamada, T, Otsuka, J, Saruwatari, A

   This study focuses on the process of thermocline's destruction and reformation during typhoons using field observation data. The thermocline has a large effect on the circulation and would be a factor to make water worse. Therefore, it is necessary to understand its process deeply. In this study, the stability of density stratification was evaluated based on the Brant-Vaisala frequency and the Richardson number. The results suggested that high wave destroyed the stratification and high wind mixed ocean water vertically more energetically during stratified season. On the other hand, is was found that stratification was unstable regardless of typhoon intensity during unstratified season. Moreover, the characteristics of water-mass were evaluated on the TS diagram during unstratified season.

  Japan Society of Civil Engineers, Nov. 2016, 土木学会論文集B2（海岸工学）, 72(2) (2), I_487 - I_492, Japanese

  [Refereed]

  Scientific journal


• ロバストな幼稚仔海洋分散評価に向けた Lagrange 粒子追跡モデルの感度解析

  Kosako, T, Uchiyama, Y

  Nov. 2016, 土木学会論文集B2（海岸工学）, 72(2) (2), I_1279 - I_1284, Japanese

  [Refereed]

  Scientific journal


• グラフ理論とコンパクト海洋モデルを用いた最適航路選定法の開発

  Uchiyama, Y, Kurosawa, K, Kosako, T, Tada, H

  Nov. 2016, 土木学会論文集B2（海岸工学）, 72(2) (2), I_1549 - I_1554, Japanese

  [Refereed]

  Scientific journal


• ROMS-NPZD モデルを用いた黒潮域における中規模海洋変動と低次生産の解析

  Uchiyama, Y, Suzue, Y, Yamazaki, H

   The Kuroshio is one of the most energetic western boundary currents accompanied by vigorous eddy activity both at meso- and submesoscales which significantly affect biogeochemical productivity in the upper ocean. We examine such processes with a climatological ocean modeling based on ROMS coupled with an NPZD model for the Kuroshio region off Japan. Cyclonic mesoscale eddies develop in the coastal area of Enshu Nada, leading to upward nutrient supply to euphotic zone with promoting active primary production. In contrast, Chl.a is much less prominent around the Kuroshio path where the higher EKE is distributed. The downward eddy-induced vertical nutrient flux occurs at depth beneath the Kuroshio path and the reduction of nutrient consequently takes place. Therefore, a substantial amount of nutrient is removed from the near-surface layer by eddy-driven downward nutrient transport, resulting in suppressing the primary production there.

  Japan Society of Civil Engineers, Nov. 2016, 土木学会論文集B2（海岸工学）, 72(2) (2), I_1369 - I_1374, Japanese

  [Refereed]

  Scientific journal


• Upper ocean dynamics and associated water exchange at the entrance of a semi-enclosed bay based on an in-situ ADCP measurement

  Yusuke Uchiyama, Tomomichi Yoshiki, Hiroaki Tada, Yasuyuki Baba, Hideaki Mizutani, Teruhiro Kubo, Nobuhito Mori, Ayumi Saruwatari, Junichi Otsuka, Junichi Ninomiya Yasunori, Watanabe,Tomohito Yamada

  Aug. 2016, AOGS 13th Annual Meeting (AOGS 2016)

  [Refereed]


• Characterizing storm water dispersion and dilution from small coastal streams

  Leonel Romero, David A. Siegel, James C. McWilliams, Yusuke Uchiyama, Charles Jones

  Jun. 2016, JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 121(6) (6), 3926 - 3943, English

  [Refereed]

  Scientific journal


• Mid- to Inner-Shelf Coupled ROMS-SWAN Model-Data Comparison of Currents and Temperature: Diurnal and Semidiurnal Variability

  Nirnimesh Kumar, Falk Feddersen, Sutara Suanda, Yusuke Uchiyama, James McWilliams

  Mar. 2016, JOURNAL OF PHYSICAL OCEANOGRAPHY, 46(3) (3), 841 - 862, English

  [Refereed]

  Scientific journal


• MODEL SENSITIVITY AND ROBUSTNESS IN THE ESTIMATION OF LARVAL DISPERSAL IN THE SETO INLAND SEA, JAPAN

  KOSAKO Taichi, UCHIYAMA Yusuke

  We evaluate sensitivity and robustness of larval dispersal patterns to particle tracking parameters (the number of particles and the particle release depth) and to configurations of circulation model (horizontal resolution and output interval), using a triple-nested, high-resolution Seto Inland Sea (SIS) circulation model coupled with an offline Lagrangian particle tracking model. The optimal number of particles is evaluated 8,000 in inner bays while 12,000 near the mouth. Although the depth of initial particle displacement relevant to vertical migration of spawned larvae is less influential, refinement of lateral grid resolution in the circulation model is essential to realistic larval dispersal patterns due to better representation of complicated flow structures near coastlines and straits. Inclusion of transient tidal forcing is substantial to enhance the robustness, even as residual effects through the daily-averaged circulation field.

  Japan Society of Civil Engineers, 2016, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 72(2) (2), I_1279 - I_1284, Japanese


• IN SITU MEASUREMENTS OF ATMOSPHERIC AEROSOL OVER THE OCEAN

  SARUWATARI Ayumi, NINOMIYA Junichi, WATANABE Yasunori, YAMADA Tomohito, OTSUKA Junichi, BABA Yasuyuki, MIZUTANI Hideaki, KUBO Teruhiro, UCHIYAMA Yusuke, MORI Nobuhito

  Sea spray is one of the important factors to affect weather conditions over the ocean in terms of constituting an aerosol as well as determining air-sea transport of heat, moisture and momentum. The final goal of this study is to explain the relationship between sea-spray generation and conditions of the atmosphere and ocean for a more accurate prediction of the amount of sea spray. This study conducted three-year field observations of atmospheric aerosol at an offshore observatory in Tanabe Bay, Wakayama. Large-scale (> 100 km) distribution of atmospheric aerosol was found to dominate the concentration of the observed aerosol less than 1 μm in normal weather conditions. During storm events with strong winds from the Pacific Ocean, however, the observed concentration monotonically increased with the wind speed, which is considered to be a result of the increase in oceanic aerosol derived from sea spray.

  Japan Society of Civil Engineers, 2016, Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM)), 72(2) (2), I_537 - I_547, Japanese

  [Refereed]

  Scientific journal


• Field Measurements at Tanabe-Nakashima Observation Tower in the Summer of 2016

  Baba, Y, Mizutani, H, Kubo, T, Uchiyama, Y, Mori, N, Watanabe, Y, Yamada, T, Saruwatari, A, Otsuka, J, Ninomiya, J

  京都大学防災研究所, 2016, Annuals of Disas. Prev. Res. Inst., Kyoto Univ., 60(60) (60), 664 - 671, Japanese

  Research institution


• On tridimensional rip current modeling

  Patrick Marchesiello, Rachid Benshila, Rafael Almar, Yusuke Uchiyama, James C. McWilliams, Alexander Shchepetkin

  Dec. 2015, OCEAN MODELLING, 96, 36 - 48, English

  [Refereed]

  Scientific journal


• AN EDDY HEAT FLUX ANALYSIS ON ENHANCEMENT OF SUBMESOSCALE MIXING AROUND THE RYUKYU ISLANDS

  Kamidaira, Y, Uchiyama, Y, Mitarai, S, Nakada, S

  A synoptic, regional downscaling experiment of the Kuroshio off the Ryukyu Islands, Japan, forced by the JCOPE2 and GPV-MSM with a horizontal resolution of 1 km exhibits the evident predominance of submesoscale anticyclonic eddies over cyclones in the narrow strip between the Kuroshio and the islands (Uchiyama et al., 2013). In order to investigate submesoscale dynamics and associated lateral mixing around the Ryukyu Islands, we conduct an eddy heat flux (EHF) analysis on eddying currents. We specifically focus on the divergent component of the EHF (dEHF) that is responsible for the eddy heat transport normal to the Kuroshio. We show that the rotational EHF (rEHF) vectors follow the temperature variance contours while the dEHF properly measures the contribution of the normal component. The diagnostic EHF analysis suggests that these lateral eddy heat transport occurring asymmetrically relative to the Kuroshio axis is associated with submesoscale eddies due to the topographic shear.

  Japan Society of Civil Engineers, Nov. 2015, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 71(2) (2), 1219 - 1224, Japanese

  [Refereed]

  Scientific journal


• EFFECTS OF SUBMESOSCALE EDDIES ON SEASONAL VARIABILITY OF THE SUBPOLAR FRONT AND THE TSUSHIMA WARM CURRENT IN THE JAPAN SEA

  Uchiyama, Y, Miyazaki, D, Kanki, R, Miyazawa, Y

  Seasonal variability of the subpolar front (SPF) and associated East Korea Warm Current (EKWC) and Tsushima Warm Current (TWC) is examined with the double nested JCOPE2-ROMS downscaling oceanic circulation model. The submesoscale (SMS) eddy-resolving model successfully reproduces the EKE trapping in the surface layer due to emergence of energetic SMS eddies mainly attributed to symmetric instability induced by surface cooling during winter and spring. The SMS eddy-driven horizontal stirring leads to weakening of the SPF, EKWC and TWC significantly. In turn, the decreased SMS mixing along with the increased influx from the Tsuhima Straight stabilize the EKWC and TWC to sharpen the SPF.

  Japan Society of Civil Engineers, Nov. 2015, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 71(2) (2), 415 - 420, Japanese

  [Refereed]

  Scientific journal


• DISPERSAL OF LAND-DERIVED SUSPENDED RADIONUCLIDES IN THE FUKUSHIMA COAST

  Yamanishi, T, Uchiyama, Y, Tsumune, D, Misumi, K

  Misumi et al. (2014) estimated suspended ¹³⁷Cs concentration in the seabed by a mathematical model considering static adsorption and desorption of ¹³⁷Cs between the seawater and the bed sediments. How-ever, the inferred bed ¹³⁷Cs is substantially underestimated in the offshore area at depth deeper than 200 m. They attributed the reason of this discrepancy to nearshore-originated seaward sediment transport that is omitted in their model. Our model results reveal that although the land-derived or nearshore clay-class sediments reach the deeper area, the time-integrated deposition is only about 2.0×10^-3 kg/m² that is con-sidered to be a minor fraction. It is suggested that debris of organic matters and biogenic opal rather than land-derived minerals likely cause the offshore ¹³⁷Cs deposition. We further examine nearshore dispersal patterns and quantify the ¹³⁷Cs inventory in the land-derived sediments though the rivers.

  Japan Society of Civil Engineers, Nov. 2015, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 71(2) (2), 565 - 570, Japanese

  [Refereed]

  Scientific journal


• MESOSCALE OCEANIC RESPONSES TO TYPHOONS IN THE NORTHWESTERN PACIFIC

  Uchiyama, Y, Tada, H

  Typhoons alter the upper ocean dynamics and thermal structure, giving rise to feedback on the atmosphere. Intense ocean surface wind and barometric effects induce rough waves and storm surges that occasionally cause severe coastal disasters. For rigorous oceanic modeling under typhoon conditions, we implement the inverse barometer effect and the COAMPS bulk formula into ROMS. A submesoscale eddypermitting oceanic modeling is configured at a horizontal resolution of 2 km based on the JCOPE2-ROMS downscaling system forced by the JMA GPV-MSM atmospheric reanalysis. A retrospective, synoptic reanalysis is carried out with a particular focus on the two consecutive super typhoons Phanfone (#1418, Category 4, the lowest pressure was 935 hPa) and Vongfong (#1419, Cat. 5, 900 hPa) in the fall 2014. These typhoons abruptly amplify the volume outflux from the Seto Inland Sea (SIS) at the Bungo Channel, leading to the pronounced counter-clockwise circulation that opposes the clockwise overall SIS circulation under the normal condition. The model also successfully reproduces increased eddy kinetic energy below the typhoons with intense cyclonic positive vorticity driven by torque of the wind stress curl, not only at surface but also at depth down to about 100 m deep. These cyclones are cold-core mesoscale eddies with SST decrease by about 3°C associated with prominent mixed layer deepening.

  Japan Society of Civil Engineers, Nov. 2015, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 71(2) (2), 211 - 216, Japanese

  [Refereed]

  Scientific journal


• INFLUENCES OF KUROSHIO PATH ON LARVAL DISPERSAL IN THE SETO INLAND SEA, JAPAN

  Kosako, T, Uchiyama, Y, Mitarai, S

  We investigate influences of fluctuating Kuroshio path on circulation and larval dispersal in the Seto Inland Sea (SIS) using a massive amount of Lagrangian particles released from 83 patches in the modeled SIS circulation field with a double-nested, high-resolution ROMS configuration for the years 2004-2013. The clockwise overall circulation in the SIS is largely affected by the distances of the Kuroshio axis from the Capes Toi, Ashizuri, and Shionomisaki. Interanual and seasonal variability of the pelagedic larval dispersal is then examined with Lagrangian PDFs of the dispersed particles. The larval dispersal generally occurs eastward, maily cuased by the clockwise SIS circulation and thus the transient Kuroshio. In summer, however, the eastward larval dispersal is pronousedly altered by locally-developed anticyclonic gyres associated with the "cold dome" in the Iyo Sea and Harima Sea. In the Iyo Sea, the eastward transport is maintained by a relatively weak gyre, while it is rather reduced through trapping of a strong gyre in the Harima Sea. In winter, many of the larvae released from the Iyo Sea are transported westward due to the northerly winter monsoon, while the persisitent eastward transport is predominant in the Harima Sea.

  Japan Society of Civil Engineers, Nov. 2015, Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 71(2) (2), 1231 - 1236, Japanese

  [Refereed]

  Scientific journal


• Three-dimensional transient rip currents: Effects of topography on low-frequency motions

  Uchiyama, Y, Kawakami, M

  JSST, Oct. 2015, Proc. of 34th JSST Annual Conference: International Conference on Simulation Technology, 318 - 320, English

  [Refereed]

  International conference proceedings


• Seasonal variability of Eulerian tracer dispersal in an estuary and a continental shelf margin

  Suzue, Y, Uchiyama, Y

  JSST, Oct. 2015, Proc. of 34th JSST Annual Conference: International Conference on Simulation Technology, 314 - 317, English

  [Refereed]

  International conference proceedings


• Larval dispersal in the Seto Inland Sea analyzed with a 3-D Lagrangian particle tracking

  Kosako, T, Uchiyama, Y

  JSST, Oct. 2015, Proc. of 34th JSST Annual Conference: International Conference on Simulation Technology, 310 - 313, English

  [Refereed]

  International conference proceedings


• A MESOSCALE HEAT BUDGET ANALYSIS DURING TYPHOON PASSAGES AROUND THE SETO INLAND SEA, JAPAN

  Uchiyama, Y, Nishii, T

  Japan Society of Civil Engineers, Jun. 2015, Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering), 71(2) (2), 383 - 388, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• SEASONAL VARIABILITY OF LAND-DERIVED PASSIVE TRACER DISPERSAL IN THE SETO INLAND SEA AND THE ENSHU-NADA COAST

  Uchiyama, Y, Suzue, Y, Kosako, T

  Japan Society of Civil Engineers, Jun. 2015, Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering), 72(4) (4), I_949 - I_954, Japanese

  [Refereed]

  Scientific journal


• MESOSCALE REPRODUCIBILITY IN AN ASSIMILATIVE OCEANIC DOWNSCALING MODEL USING A 3-D STRATIFICATION ESTIMATE BASED ON SATELLITE ALTIMETRY AND ARGO FLOAT DATA

  Uchiyama, Y, Kanki, R, Takano, A, Yamazaki, H, Miyazawa, Y

  Japan Society of Civil Engineers, Jun. 2015, Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering), 71(2) (2), 365 - 370, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Midshelf to Surfzone Coupled ROMS-SWAN Model Data Comparison of Waves, Currents, and Temperature: Diagnosis of Subtidal Forcings and Response

  Nirnimesh Kumar, Falk Feddersen, Yusuke Uchiyama, James McWilliams, William O'Reilly

  Jun. 2015, JOURNAL OF PHYSICAL OCEANOGRAPHY, 45(6) (6), 1464 - 1490, English

  [Refereed]

  Scientific journal


• Field Measurements at Tanabe-Nakashima Observation Tower in the Summer of 2015

  Baba, Y, Mizutani, H, Kubo, T, Uchiyama, Y, Mori, N, Watanabe, Y, Yamada, T, Saruwatari, A, Otsuka, J, Ninomiya, J

  This paper shows some results of a field observation carried out in the summer of 2015. The vertical profiles of currents and water temperature have been measured as well as wave and wind conditions, and salinity observations have been carried out at the observation tower of Shirahama Oceanographic Observatory. In the summer in 2015, no typhoon approached around the observation site, and the high wave and strong wind conditions have not been captured during the observation. Several short-term rainfalls due to front and low pressure occurred, and it is reported that local areas in Shirahama town and neighboring towns suffered some damages with windblasts from late August to early September. It is found in the observation results of water temperature that the temporal variations of water temperature have a period of 3 to 6 days in the deeper layers like 20m deep and 30m deep. The cyclical fluctuation of water temperature at 30m deep has opposite phase to the fluctuation of salinity. This result means that low temperature and high salinity water approaches to the observation site periodically and that some influences of the water mass of the open sea exist.

  京都大学防災研究所, 2015, Annuals of Disas. Prev. Res. Inst., Kyoto Univ., 59(59) (59), 431 - 437, Japanese

  Research institution


• A regional sediment transport modeling for fluvial influx and redistribution of suspended radio nuclide in the Fukushima Coast

  Uchiyama, Y, Yamanishi, T, Tsumune, D, Miyazawa, Y

  Fluvial discharge from the rivers is viewed as a missing piece for the inventory of the radionuclides in the ocean during the accident at the Fukushima Daiichi Nuclear Power Plant. The land-derived input introduces a time lag behind the direct release through hydrological process because these radionuclides mostly attach to suspended particles (sediments) that are transported quite differently to the dissolved matter in the ocean. We therefore develop a regional sediment transport model consisting of a multi-class non-cohesive sediment transport module, a wave-enhanced bed boundary layer model and a stratigraphy model proposed by Blaas et al. (2007) based on ROMS.

  Japan Society of Civil Engineers, Nov. 2014, J. JSCE, Ser.B2, Coastal Engineering, 70(2) (2), 571 - 575, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Oceanic downscaling effects on the circulations in Japan Sea with a JCOPE2-ROMS system

  Uchiyama, Y, Miyazaki, D, Kanki, R, Miyazawa, Y

  In Japan Sea, effects of submesoscale dynamics on the mean structure, eddies, etc. have not been fully understood yet. Towards a rigorous submesoscale Japan Sea modeling, a detailed oceanic downscaling experiment is conducted with a double nested ROMS at horizontal resolutions of 3 km (ROMS-L1) and 1 km (L2), forced by the assimilative JCOPE2 at 1/12 deg. as the lateral boundary condition. The results from ROMS-L1, L2 and JCOPE2 are compared to the observation and satellite altimetry dataset to show a good agreement with an appropriate parameter choice. Submesoscale eddies are quite active in the southern half of Japan Sea, leading to enhancement of prevailing Tsushima and Liman Currents.

  Japan Society of Civil Engineers, Nov. 2014, J. JSCE, Ser.B2, Coastal Engineering, 70(2) (2), 451 - 455, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Analysis of ocean acidification in the Pacific Ocean based on the data-driven evaluation of the air-sea carbon dioxide flux

  Uchiyama, Y, Matsuyama, M, Kamidaira, Y

  The ocean absorbs about 1/3 of the anthropogenic CO₂ released to the atmosphere. As more CO₂ accumulates in the ocean, the oceanic pH decreases, leading to ocean acidification. In order to better understand the carbon cycle in the ocean and associated long-term pH variation, we estimate CO₂ exchange flux at the sea surface in the Pacific Ocean with the empirical method proposed by Sugimoto et al. (2012) exploiting the publically available oceanic dataset. The oceanic CO₂, the air-sea CO₂ flux, and pH are successfully evaluated for the Pacific Ocean from 1985 through 2008. The pH and CO₂ absorption relation is then argued along with climatological influences during the ENSO events.

  Japan Society of Civil Engineers, Nov. 2014, J. JSCE, Ser.B2, Coastal Engineering, 70(2) (2), 1286 - 1290, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Water exchange at the mouth of Tanabe Bay in Kii Peninsula, Japan

  Uchiyama, Y, Matsukawa, D, Kanki, R, Baba, Y, Mori, N, Mizutami, H, Watanabe, Y, Otsuka, J, Yamada, T, Saruwatari, A, Ninomiya, J

  Tanabe bay is a small embayment connected directly to the Pacific Ocean to the south, whereas frequently suffers from harmful algal blooms due to sewage effluent and the local aquaculture industry. For preserving the ecosystem in the bay, it is necessary to understand an oceanic structure in the bay along with water exchange at the bay entrance. We thus conduct a comprehensive investigation consisting of a shipboard measurement, a season-long platform observation, and a triply nested high-resolution ocean modeling. The water exchange at the bay mouth is largely affected by semi-diurnal tidal currents and episodic subtidal intrusion of the offshore water controlled by mesoscale circulations.

  Japan Society of Civil Engineers, Nov. 2014, J. JSCE, Ser.B2, Coastal Engineering, 70(2) (2), 446 - 450, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Effects of wave-current interaction on overwrapping submesoscale eddies and unsteady littoral currents

  Kaida, H, Uchiyama, Y

  Effects of two-way wave-current interaction (WCI) on the surfzone-inner shelf circulations affected by submesoscale eddies and unsteady littoral currents are investigated with the ROMS-WEC model (Uchiyama et al., 2010) coupled tightly with a spectrum-peak wave model to account for both wave effects on currents (WEC) and current effects on waves (CEW) (e.g., Uchiyama et al., 2009). Eddy activity around the outer edge of the surfzone is enhanced when CEW is considered. The key mechanism to induce the surfzone-inner shelf dynamical interaction and enhancement of offshore eddy activity is considered to be CEW that weakens the offshore component of the littoral currents. In turn,offshore eddy activity is attenuated by WEC, demonstrating that WCI plays an essential role not only in the sufzone but also in the shelf region.

  Japan Society of Civil Engineers, Nov. 2014, J. JSCE, Ser.B2, Coastal Engineering, 70(2) (2), 71 - 75, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Marine ecosystem networks in the Seto Inland Sea analyzed with coastal connectivity

  Uchiyama, Y, Kosako, T, Nishii, T, Mitarai, S

  Connectivity evaluates stochastic processes of larval dispersal due to chaotic coastal circulations (e.g., Mitarai et al., 2009). In the present study, we quantify Lagrangian PDFs and connectivity using many Lagrangian particles released from 140 source sites in the modeled SIS circulation field in a double-nested, high-resolution ROMS configuration (Uchiyama et al., 2012). In winter, the fraction of particles transported to another region is about less than 40% except for both the channels, suggesting that particles largely remain in the release region. The regional connectivity is correlated with the seasonal variation of the mass fluxes at the straights between two neighboring regions. Particles released from Harima-Nada, representing larvae of marbled sole, are mainly transported towards the northern shore of Shodo Island, while particles arriving there originate mostly from the western shore of Harima-Nada.

  Japan Society of Civil Engineers, Nov. 2014, J. JSCE, Ser.B2, Coastal Engineering, 70(2) (2), 1076 - 1080, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• On tridimensional rip current modeling

  Marchesiello, P, Benshila, R, Almar, R, Uchiyama, Y, McWilliams, J, Shchepetkin, A

  IAHR, Sep. 2014, Proc. 19th IAHR-APD Congress 2014, 7 pp., English

  [Refereed]

  International conference proceedings


• Effects of the submesoscale anticyclonic eddies induced by Kuroshio in East China Sea

  Kamidaira, Y, Uchiyama, Y, Mitarai, S, Sakagami, T

  ISOPE, Jun. 2014, Proc. 24th International Ocean and Polar Engineering Conference, 5 pp., English

  [Refereed]

  International conference proceedings


• Coastal dispersal of urban treated wastewater in semi-enclosed estuaries

  Uchiyama, Y, Kanki, R, Nakayama, A

  ISOPE, Jun. 2014, Proc. 24th International Ocean and Polar Engineering Conference, 4 pp., English

  [Refereed]

  International conference proceedings


• Wastewater effluent dispersal in Southern California Bays

  Yusuke Uchiyama, Eileen Y. Idica, James C. McWilliams, Keith D. Stolzenbach

  Mar. 2014, CONTINENTAL SHELF RESEARCH, 76, 36 - 52, English

  [Refereed]

  Scientific journal


• Principal component analysis on horizontal acoustic Doppler current profilers measurement in a tidal river

  Phan, T.N.M, Wells, J.C, Uchiyama, Y, Ishii, S, Bonner, J.S, Islam, M.S, Kirkey, W.D

  Principal Component Analysis (PCA) is proposed on long-beam velocities of Horizontal Acoustic Doppler Current Profiler (HADCP) to extract flow dynamics in near-bank regions and check simulation results, particularly Regional Ocean Modeling System (ROMS) performed for the Hudson River estuary (New York, USA). We here analyzed data measured by Horizontal Acoustic Doppler Current Profiler (HADCP) at West Point, on the inner bank downstream of a bend. Results show an agreement between HADCP and ROMS in the first mode, which capture more than 97% energy of the turbulent flow measured along three HADCP beams. In addition, there appears an asymmetry between ebb and flood in the second temporal coefficient. Low-order PCA coefficients of HADCP and ROMS have fluctuation in ebb tide which may be associated with topographically-generated eddies. Tidal effect is found in lower order temporal coefficients and their spectra.

  JSCE, Mar. 2014, Annual Journal of Hydraulic Eng., 70(4) (4), 73 - 78, English

  [Refereed]

  Scientific journal


• Wave-current interaction in dynamics of batoropic nearshore current system

  Hideki Kaida, Yusuke Uchiyama

  JSCE, Jan. 2014, J. JSCE, Ser.B2, Coastal Engineering, 70(1) (1), 1 - 14, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Water Temperature Variation at the Mouth of Tanabe Bay during Typhoon Passing

  Baba, Y, Mizutani, H, Kubo, T, Uchiyama, Y, Mori, N, Watanabe, Y, Otsuka, J, Yamada, T, Saruwatari, A, Ninomiya, J

  公益社団法人 土木学会, 2014, J. JSCE, Ser.B2, Coastal Engineering, 70(2) (2), I_476 - I_480, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Field Measurements at Tanabe-Nakashima Observation Tower in the Summer of 2014

  Baba, Y, Mizutani, H, Kubo, T, Uchiyama, Y, Mori, N, Watanabe, Y, Yamada, T, Saruwatari, A, Otsuka, J, Ninomiya. J

  This paper shows some results of a field observation carried out in the summer of 2014. The vertical profiles of currents and water temperature have been measured as well as wave and wind conditions, and salinity and dissolved oxygen level observations have been carried out at the observation tower of Shirahama Oceanographic Observatory. In the summer in 2014, a total of 4 typhoons (No.11, No.12, No.18 and No.19) approached to the Kii peninsula, and the high wave and strong wind conditons due to 2 typhoons (No.18 and No.19) have been captured during the observation. When the typhoons passed around the observation site, the high wave and strong wind occurred. However, the observation data of 2014 doesn't have clear shift of water temperature and salinity like the one by the typhoon No.18 in 2013. On the other hand, it is repeatedly found in the observed data that the reduction of water temperature and the increase of salinity happened simultaneously. This result indicates that the water temperature and the salinity around the observation site have some influence of the water mass of the open sea.

  京都大学防災研究所, 2014, Annuals of Disas. Prev. Res. Inst., Kyoto Univ., (58) (58), 315 - 320, Japanese

  Research institution


• Effect of the Kuroshio due to submesoscale anticyclonic eddies and the stirring around Ryukyu Islands

  Uchiyama, Y, Kamidaira, Y, Mitarai, S, Sakagami, T

  土木学会, Nov. 2013, J. JSCE, Ser.B2, Coastal Engineering, 69(2) (2), 471 - 475, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Wave-current interaction on morphological evolution of rip channel systems

  Uchiyama, Y, Miyazaki, D, Kaida, H

  Nov. 2013, J. JSCE, Ser.B2, Coastal Engineering, 69(2) (2), 521 - 525, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Influences of coastal jet and mesoscale eddies on initial dispersion of the radionuclides released from Fukushima Daiichi Nuclear Power Plant

  Uchiyama, Y, Yananishi, T, Tsumune, D, Miyazawa, Y, Ishii, T

  Nov. 2013, J. JSCE, Ser.B2, Coastal Engineering, 69(2) (2), 1051 - 1055, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Submesoscale Instability and Associated Mixing in the Kuroshio Front

  Uchiyama, Y, Ishii, S, Miyazawa, Y

  土木学会, Nov. 2013, J. JSCE, Ser.B2, Coastal Engineering, 69(2) (2), 456 - 460, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• A triply-nested high-resolution ocean modeling of wastewater dispersal in Osaka Bay and Harima Nada

  Uchiyama, Y, Kanki, R, Nakayama, A

  土木学会, Nov. 2013, J. JSCE, Ser.B2, Coastal Engineering, 69(2) (2), 1056 - 1060, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Cold-water formation and oceanic response associated with typhoon passages off Kii Peninsula

  Uchiyama, Y, Nishii, T, Mori, N, Baba, Y

  土木学会, Nov. 2013, J. JSCE, Ser.B2, Coastal Engineering, 69(2) (2), 481 - 485, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Surfzone-inner shelf interaction analyzed with an Eulerian-averaged Primitive equation based on a vortex-force formalism

  Uchiyama, Y, Kaida, H, McWilliams, J

  土木学会, Nov. 2013, J. JSCE, Ser.B2, Coastal Engineering, 69(2) (2), 56 - 60, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Simulations of Nearshore Particle-Pair Dispersion in Southern California

  Leonel Romero, Yusuke Uchiyama, J. Carter Ohlmann, James C. Mcwilliams, David A. Siegel

  Sep. 2013, JOURNAL OF PHYSICAL OCEANOGRAPHY, 43(9) (9), 1862 - 1879, English

  [Refereed]

  Scientific journal


• Field measurement at Tanabe-Nakashima observation tower in the summer of 2012

  Y. Baba, T. Kubo, Y. Uchiyama, N. Mori

  Disaster Prevention Research Inst., Kyoto Univ., Jun. 2013, Annuals of Disaster Prevention Research Inst., Kyoto Univ., (56B) (56B), 441 - 447, Japanese

  Research institution


• Wave-current interaction in formation of RIP channel system

  Y. Uchiyama, H. Kaida, D. Miyazaki

  2013, Proceedings of the 7th International Conference on Asian and Pacific Coasts, APAC 2013, 173 - 179, English

  [Refereed]

  International conference proceedings


• Field Observations at an Offshore Observation Tower during the Typhoon Seasons

  Yasuyuki Baba, Teruhiro Kubo, Yusuke Uchiyama, Naoto Kihara, Nobuhito Mori, Yasunori Muto, Takayuki Suzuki

  2013, PROCEEDINGS OF THE 35TH IAHR WORLD CONGRESS, VOLS III AND IV, English

  [Refereed]

  International conference proceedings


• Field Measurements at Tanabe-Nakashima Observation Tower in the Summer of 2013

  Y. Baba, Mizutani, H, T. Kubo, Y. Uchiyama, N. Mori, Watanabe, Y, Yamada, T, Saruwatari, A, Otsuka, J

  This paper shows some results of a field observation carried out in the summer of 2013. The vertical profiles of currents and water temperature have been measured as well as wave and wind conditions, and salinity and dissolved oxygen level observations have been carried out at the observation tower of Shirahama Oceanographic Observatory. During the observation, one typhoon (No.18, MAN-YI) approached to the Kii peninsula. When the typhoon passed around the observation site, the vertical mixing develops well, and water temperature at all measurement points show almost uniform distributions. It is also found during the typhoon passing that coastal upwelling through the Ekman transport happened clearly due to continuous southward wind. An EOF analysis decomposes the water temperature variation during the typhoon passing into 1) the increase and decease of water temperature and 2) the magnitude of the temperature difference in the vertical direction.

  Disaster Prevention Research Inst., Kyoto Univ., 2013, Annuals of Disaster Prevention Research Inst., Kyoto Univ., (57) (57), 455 - 461, Japanese

  Research institution


• Suppression mechanism of development of rip currents by current effects on waves

  Uchiyama, Y, Kaida, H

  土木学会, Nov. 2012, J. JSCE, Ser.B2, Coastal Engineering, Vol.68(2) (2), I_36 - I_40, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Oceanic Dispersion of Radioactive Cesium-137 from Fukushima Daiichi Nuclear Power Plant

  Uchiyama, Y, Ishii, T, Tsumune, D, Miyazawa, Y

  土木学会, Nov. 2012, J. JSCE, Ser.B2, Coastal Engineering, Vol.68(2) (2), I_931 - I_935, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Impact of the Kuroshio Paths on Oceanic and Estuarine Circulations in and around Seto Inland Sea

  Uchiyama, Y, Kuriyama, T, Miyazawa, Y

  土木学会, Nov. 2012, J. JSCE, Ser.B2, Coastal Engineering, Vol.68(2) (2), I_441 - I_445, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Effects of Surface Gravity Waves on an Inner-Shelf Circulation Analyzed with an Eulerian-Averaged Primitive Equation Ocean Model Based on a Vortex-Force Formalism

  Uchiyama, Y, Nishii, T, McWilliams, J

  土木学会, Nov. 2012, J. JSCE, Ser.B2, Coastal Engineering, Vol.68(2) (2), I_426 - I_430, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Oceanic Downscaling Effects on the Kuroshio Extension Jet using a JCOPE2-ROMS System

  Uchiyama, Y, Ishii, S, Miyazawa, Y

  土木学会, Nov. 2012, J. JSCE, Ser.B2, Coastal Engineering, Vol.68(2) (2), I_436 - I_440, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Modeling Semidiurnal Internal Tide Variability in the Southern California Bight

  M. C. Buijsman, Y. Uchiyama, J. C. McWilliams, C. R. Hill-Lindsay

  Jan. 2012, JOURNAL OF PHYSICAL OCEANOGRAPHY, 42(1) (1), 62 - 77, English

  [Refereed]

  Scientific journal


• Mesoscale Variability in the Northeastern Tropical Pacific: Forcing Mechanisms and Eddy Properties

  Liang, J.-H, McWilliams, J.C, Kurian, J, Colas, F, Wang, P, Uchiyama, Y

  2012, Journal of Geophysical Research - Oceans, 117(C7) (C7), 7003 - 7003

  [Refereed]

  Scientific journal


• Vortex-forceを用いたオイラー型位相平均プリミティブ方程式による海浜流の3次元解析

  Uchiyama, Y, McWilliams, J

  土木学会, Nov. 2011, J. JSCE, Ser.B2, Coastal Engineering, Vol.67, No.2, 96-100.(2) (2), 96 - 100, Japanese

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• A vortex force analysis of the interaction of rip currents and surface gravity waves

  B. Weir, Y. Uchiyama, E. M. Lane, J. M. Restrepo, J. C. McWilliams

  May 2011, JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 116(C5) (C5), 1 - 16, English

  [Refereed]

  Scientific journal


• Wave-current interaction in an oceanic circulation model with a vortex-force formalism: Application to the surf zone

  Yusuke Uchiyama, James C. McWilliams, Alexander F. Shchepetkin

  2010, OCEAN MODELLING, 34(1-2) (1-2), 16 - 35, English

  [Refereed]

  Scientific journal


• An oceanic cyclonic eddy on the lee side of Lanai Island, Hawai'i

  Changming Dong, Timothy Mavor, Francesco Nencioli, Songnian Jiang, Yusuke Uchiyama, James C. McWilliams, Tommy Dickey, Michael Ondrusek, Hongchun Zhang, Dennis K. Clark

  Oct. 2009, JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 114(C10) (C10), 10008, English

  [Refereed]

  Scientific journal


• Wave-current interaction in nearshore shear instability analyzed with a vortex force formalism

  Yusuke Uchiyama, James C. McWilliams, Juan M. Restrepo

  Jun. 2009, JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 114(C6) (C6), 6021, English

  [Refereed]

  Scientific journal


• Infragravity waves in the deep ocean: Generation, propagation, and seismic hum excitation

  Yusuke Uchiyama, James C. McWilliams

  Jul. 2008, JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 113(C7) (C7), 7029, English

  [Refereed]

  Scientific journal


• Hydrodynamics and associated morphological variations on an estuarine intertidal sand flat

  Yusuke Uchiyama

  Jul. 2007, JOURNAL OF COASTAL RESEARCH, 23(4) (4), 1015 - 1027, English

  [Refereed]

  Scientific journal


• 堆積物による酸素消費と生成─渦相関 法を適用した新たな測定方法の開発ー

  桑江朝比古, 神尾光一郎, 井上徹教, 三好英一, UCHIYAMA YUSUKE

  堆積物による酸素消費と生成は, これまで底生閉鎖系システム内の酸素濃度変化を追跡する方法で測定されていた. しかし, 従来法では外力条件や間隙水の移流を再現した測定ができず, その精度には疑問があった. 本研究では, ADV・酸素微小電極・渦相関法を用いることにより, 従来法とはまったく異なる測定手法を新たに開発し, 高精度な測定に成功した. 透水性のある砂質堆積物の酸素消費速度を従来法で測定した結果, 最大でも渦相関法の23%であったことから, 従来法では速度を著しく過小評価する可能性が高いことがわかった. 渦相関法は従来法の欠点が克服され適用範囲も広いことから, 今後の標準法になり得ることが確認された.

  土木学会, 2006, 海岸工学論文集, 53, 1411 - 1415, Japanese

  [Refereed]

  Scientific journal


• Oxygen exchange flux between sediment and water in an intertidal sandflat, measured in situ by the eddy-correlation method

  T Kuwae, K Kamio, T Inoue, E Miyoshi, Y Uchiyama

  2006, MARINE ECOLOGY PROGRESS SERIES, 307, 59 - 68, English

  [Refereed]

  Scientific journal


• 自然干潟における海底境界層 内の流速構造について

  UCHIYAMA YUSUKE, 中野博文, 黒坂正和, 山脇秀仁, 柳島慎一, 栗山善昭

  干出・冠水を繰り返す自然砂質干潟海域において, 流速の周波数特性および平均的な鉛直分布構造に関する現地観測を実施した. スペクトル解析, CEOF解析により, 干潟の水理特性, 特に波-流れ共存場としての海底境界層の力学特性を調べた. その結果, 基本モードとしては潮流に対応したbarotropic成分が卓越するが, 波や風による高次モードの影響も無視し得ないこと, そのため対数則速度分布からの逸脱が生じ, 鉛直方向に流向が回転することが分かった. 一方, 瞬間的な流速変動に対しては波動成分の寄与が圧倒的に大きく, 次いで乱流成分が卓越していた.

  土木学会, 2005, 海岸工学論文集, 52, 81 - 85, Japanese

  [Refereed]

  Scientific journal


• Modeling three-dimensional cohesive sediment transport and associated morphological variation in estuarine intertidal mudflats

  Uchiyama Yusuke

  港湾空港技術研究所, 2005, Report of Port and Airport Research Institute, 44(1) (1), 3 - 21, English

  [Refereed]

  Research institution


• 海底面の力学過程を考慮した冠水・干出スキームの開発と三次元σ座標海洋流動モデル への適用

  UCHIYAMA YUSUKE

  土木学会, 2004, 海岸工学論文集, 51(1) (1), 351 - 355, Japanese

  [Refereed]

  Scientific journal


• Wetting and drying scheme for POM and its application to San Francisco Bay

  Uchiyama Yusuke

  Taylor & Francis Group, London, UK, 2004, Hydrodynamics VI - Theory and Application, (eds) L. Cheng and K. Yeow, 293 - 299, English

  [Refereed]

  International conference proceedings


• Modeling wetting and drying scheme based on an extended logarithmic law for a three-dimensional sigma-coordinate coastal ocean model, Rep. Port and Airport Res. Inst., Yokosuka, Japan, Vol.43, No.4, pp.3-21.

  Uchiyama Yusuke

  港湾空港技術研究所, 2004, Report of Port and Airport Research Institute, 43(4) (4), 3 - 21, English

  [Refereed]

  Research institution


• 導流堤を有する浜名湖今切口周辺海岸の地形変化

  栗山善昭, UCHIYAMA YUSUKE, 中村聡志, 永江友和

  土木学会, 2003, 土木学会論文集, (726) (726), 109 - 120, Japanese

  [Refereed]

  Scientific journal


• 仙台湾蒲生干潟前面海浜の中期地形変動に関する複素主成分解析

  UCHIYAMA YUSUKE, 栗山善昭

  土木学会, 2003, 土木学会論文集, (747) (747), 135 - 153, Japanese

  [Refereed]

  Scientific journal


• Medium-term bathymetric change around jetties at Imagireguchi Inlet, Japan

  Kuriyama Y, Uchiyama Yusuke, Nakamura S, Nagae T

  CERF, 2003, Journal of Coastal Research, 33, 223 - 236, English

  [Refereed]

  Scientific journal


• Complex principal component analysis of medium-term nearshore geomorphology at North Sendai Coast, Japan

  Uchiyama Yusuke, Kuriyama Y

  American Sciety for Civil Engineers, Portland, OR, USA, 2003, Proc. Coastal Structures 2003, 1176 - 1188, English

  [Refereed]

  International conference proceedings


• 複素主成分分析を用いた仙台湾蒲生干潟前面海浜地形の中期変動特性の解析

  UCHIYAMA YUSUKE, 栗山善昭

  港湾空港技術研究所, 2002, 港湾空港技術研究所報告, 41(2) (2), 3 - 22, Japanese

  [Refereed]

  Research institution


• 興津海岸におけるアマモ分布条件について

  島谷 学, 中瀬浩太, 岩本裕之, 中山哲厳, 月舘真理雄, 星野高士, UCHIYAMA YUSUKE, 灘岡和夫

  土木学会, 2002, 海岸工学論文集, 49, 1161 - 1165, Japanese

  [Refereed]

  Scientific journal


• Morphodynamics on Banzu intertidal sand-flat with fluvial input

  Uchiyama, Y, Nakashima, T, Ueoka, S

  JSCE, 2001, Proc. of Coastal Engineering, 48, 531 - 535, Japanese

  [Refereed]

  Scientific journal


• Sediment suspension and short-term morphological response in winter on Banzu intertidal sand-flat, Tokyo Bay, Japan.

  Uchiyama, Y

  JSCE, 2001, Journal of Hydraulic, Coastal and Environmental Engineering, 677(677) (677), 129 - 140, Japanese

  [Refereed]

  Scientific journal


• 人工 リーフ設置による外力場の変化とアマモ分布条件との関係について

  島谷 学, 中瀬浩太, 中山哲厳, 太田雅隆, 月舘真理雄, 星野高士, UCHIYAMA YUSUKE, 灘岡和夫

  土木学会, 2001, 海岸工学論文集, 48, 1156 - 1160, Japanese

  [Refereed]

  Scientific journal


• Tidal circulation of groundwater flow formed in sandy-beach aquifers

  Uchiyama, Y

  JSCE, 2001, Journal of Hydraulic, Coastal and Environmental Engineering, 670(670) (670), 37 - 48, Japanese

  [Refereed]

  Scientific journal


• 興津湾における広域海藻分布と水理環境に関する現地調査

  中山哲厳, 槙本一徳, 灘岡和夫, UCHIYAMA YUSUKE, 中瀬浩太, 島谷 学, 星野高士, 月舘真理雄

  土木学会, 2001, 海岸工学論文集, 48, 1161 - 1165, Japanese

  [Refereed]

  Scientific journal


• Medium-term topography change in front of Gamo Lagoon

  Uchiyama, Y, Kuriyama, Y, Hatano, A

  JSCE, 2001, Proc. of Coastal Engineering, 48, 601 - 605, Japanese

  [Refereed]

  Scientific journal


• Suspended sediment and morphological response on Banzu tidal flat, Japan

  Y Uchiyama, Y Kuriyama, K Katoh

  2001, COASTAL DYNAMICS '01: PROCEEDINGS, 1038 - 1047, English

  [Refereed]

  International conference proceedings


• Submarine groundwater discharge into the sea and associated nutrient transport in a sandy beach

  Y Uchiyama, K Nadaoka, P Rolke, K Adachi, H Yagi

  Jun. 2000, WATER RESOURCES RESEARCH, 36(6) (6), 1467 - 1479, English

  [Refereed]

  Scientific journal


• Suspended sediment and morphological response on Banzu tidal flat

  Uchiyama, Y, Katoh, K, Kuriyama, Y, Furukawa, K

  JSCE, 2000, Proc. of Coastal Engineering, 47(1) (1), 521 - 525, Japanese

  [Refereed]

  Scientific journal


• 東京湾盤洲干潟の短期地形変動特性とそのメカニズムについて

  UCHIYAMA YUSUKE

  港湾技術研究所, 2000, 港湾技術研究所報告, 39(3) (3), 3 - 18, Japanese

  [Refereed]

  Research institution


• 浅海域における長周期水理現象に関する総合的現地観測

  栗山善昭, 灘岡和夫, 武若 聡, 岡安章夫, 片山裕之, 森 信人, UCHIYAMA YUSUKE, 中島 剛, 田村仁, 堀口敬洋

  土木学会, 2000, 海岸工学論文集, 47, 231 - 235, Japanese

  [Refereed]

  Scientific journal


• Formation of longitudinal vortices generated by wind-driven current in the nearshore sea

  Nadaoka K, Uchiyama Yusuke

  IAHR, Yokohama, Japan, 2000, Proc. 4th International Conference on Hydrodynamics, 797 - 802, English

  [Refereed]

  International conference proceedings


• Numerical Simulation on Local Circulation of Groundwater Flow in Beaches

  Uchiyama, Y

  JSCE, 1999, Proc. of Coastal Engineering, 46, 1241 - 1245, Japanese

  [Refereed]

  Scientific journal


• Numerical analysis on groundwater flow in sandy beaches considering tidal fluctuation and density distribution

  Uchiyama, Y

  -, 1999, Report of Port and Harbour Research Institute, 38(2) (2), 3 - 27, Japanese

  [Refereed]

  Research institution


• Submarine groundwater discharge into the sea and associated nutrient transport in a sandy beach

  Uchiyama, Y, Adachi, K, Nadaoka, K, Yagi, H, Rolke, P

  -, 1999, Journal of Hydraulic, Coastal and Environmental Engineering, 635(635) (635), 127 - 139, Japanese

  [Refereed]

  Scientific journal


• Water environments in a stratified shallow sea on a sandy beach in Tokyo Bay

  Uchiyama, Y, Nadaoka, K, Sezaki, T, Yagi, H

  JSCE, 1998, Journal of Hydraulic, Coastal and Environmental Engineering, 593(593) (593), 125 - 144, Japanese

  [Refereed]

  Scientific journal


• Shallow water environment on a sandy beach and a tidal flat in Tokyo Bay

  Uchiyama, Y, Nadaoka, K, Horikawa, S

  JSCE, 1998, Proc. of Coastal Engineering, 45, 1051 - 1055, Japanese

  [Refereed]

  Scientific journal


• Submarine groundwater discharge into the sea and associated nutrient transport

  Uchiyama, Y, Rolke, P, Nadaoka, K, Adachi, K, Nakasone, T, Yagi, H

  JSCE, 1998, Proc. of Coastal Engineering, 45, 1076 - 1080, Japanese

  [Refereed]

  Scientific journal


• Thermal structure in a stratified shallow water on a sandy beach in Tokyo Bay

  Uchiyama, Y, Nadaoka, K, Sezaki, T, Yagi, H

  JSCE, 1997, Proc. of Coastal Engineering, 44, 1071 - 1075, Japanese

  [Refereed]

  Scientific journal


• Formation of longitudinal vortices generated by wind-driven current and their influence on mixing processes in nearshore region

  Nadaoka, K, Uchiyama, Y

  JSCE, 1997, Proc. of Coastal Engineering, 44, 421 - 425, Japanese

  [Refereed]

  Scientific journal


• Salinity environments in the air and ground for coastal vegetation

  Nadaoka, K, Uchiyama, Y, Higashikawa, K

  JSCE, 1996, Proc. of Coastal Engineering, 43, 1171 - 1175, Japanese

  [Refereed]

  Scientific journal


• 海岸空間アメニティ構成要素としての微気象および温熱環境の解析

  Nadaoka, K, Uchiyama, Y, Yamashita, T

  JSCE, 1996, Journal of Hydraulic, Coastal and Environmental Engineering, 533(533) (533), 193 - 204, Japanese

  [Refereed]

  Scientific journal


• Three-dimensional organized structure of turbulent air flow around a coastal vegetational layer

  Nadaoka, K, Uchiyama, Y, Higashikawa, K

  JSCE, 1996, Proc. of Coastal Engineering, 43, 401 - 405, Japanese

  [Refereed]

  Scientific journal


• Water temperature, D.O. and Chl.a on a sandy beach in inner bay area in summer

  Nadaoka, K, Uchiyama, Y, Sezaki, T

  JSCE, 1996, Proc. of Coastal Engineering, 43, 1101 - 1105, Japanese

  [Refereed]

  Scientific journal


• 夏季砂浜海岸空間の微気象特性と人体温熱環境について

  灘岡和夫, UCHIYAMA YUSUKE, 山下哲弘

  Atmospheric environment and related thermal comfort on beaches in summer are significant factors for coastal space design to provide desirable amenity environments. Through a micrometeorological field observation conducted in summer on Makuhaii Beach facing Tokyo Bay, we found that;(1) an internal boundary layer of see breeze was clearly formed on the beach, (2) the beach surface with dry sand has appreciable effects of heating and drying on the surrounding air body, and (3) three physical comfort indices DI, SET* and EHF calculated with the observed data show that the sandy beach and its surroundings provide a highly contrasted spatial structure in thermal comfort.

  土木学会, 1995, 土木計画学研究・論文集, 12, 375 - 381, Japanese

  [Refereed]

  Scientific journal


• 夏季砂浜海岸の熱収支構造と人体の快適性

  灘岡和夫, UCHIYAMA YUSUKE, 山下哲弘

  土木学会, 1995, 水工学論文集, 39, 189 - 196, Japanese

  [Refereed]

  Scientific journal


• 水防災と環境に配慮したスーパー堤防上沿川市街地構造の研究

  福岡捷二, UCHIYAMA YUSUKE

  Discussions have hardly been made on the plan of inhabited district on the so called super levee from the viewpoint of considering flood disaster prevention.
  In this paper, basic ideas of newly inhabited district constructed on the super levee are proposed for accomplishing both functions of dissipating the energy of the flow of overtopping flood water and that of good living circumstances. Severalplans of the arrangement of tall buildings, houses and streets to properly dissipate the energy of overtopping flood flow are shown here according to the policy to haveoverflow water concentrated on streets or not.

  土木学会, 1993, 水工学論文集, 37, 833 - 836, Japanese

  [Refereed]

  Scientific journal

• 国際的な情報発信の重要性～Coastal Engineering Journal を例に～

  内山雄介

  Lead, Sep. 2023, 水工学シリーズ 23, 土木学会, B-4, B-4-1 - B-4-18

  [Invited]

  Lecture materials


• 海洋画像観測による白波波峰長と残留泡沫のスペクトル特性

  Yasunori WATANABE, Kent MINAMI, Ayumi SARUWATARI, Yasuyuki BABA, Teruhiro KUBO, Nobuhito MORI, Yusuke UCHIYAMA, Tomoya SHIMURA, Junichi OTSUKA, Yasuo NIIDA, Junichi NINOMIYA

  Japan Society of Civil Engineers, 2023, Japanese Journal of JSCE, 79(17) (17), n/a - n/a


• マルチクラス3次元懸濁質輸送モデルを用いた福島沿岸域における陸域起源懸濁態放射性核種の動態解析

  内山雄介

  Nov. 2022, 月刊海洋. 特集「海洋環境における放射性核種の動態－東京電力福島第一原発事故から10年の海洋科学的総括－」, 54(11) (11), 570 - 577, Japanese

  [Invited]

  Introduction scientific journal


• 鳴門海峡の渦潮はなぜ起こるのか？

  内山雄介

  Lead, Jul. 2022, 高翔，公益社団法人自動車技術会・関東支部, 77, 4, Japanese

  [Invited]

  Introduction commerce magazine


• 和歌山県田辺湾における海水交換特性の季節変化とその形成メカニズムに関する研究

  Okada, N, Uchiyama, Y

  （公社）瀬戸内海環境保全協会, Mar. 2019, 瀬戸内海, 77, 50–51, Japanese

  [Invited]

  Introduction scientific journal


• 数式のない土木の数値解析セミナー第23回：海洋環境シミュレーション技術の最先端

  Uchiyama, Y

  土木学会, Nov. 2018, 土木学会誌, 2018年11月号, 46–47, Japanese

  [Invited]

  Introduction scientific journal

  Link to Kobe Univ. Repository (Kernel)


• ディスドロメータを用いた野外飛沫観測

  岡地寛季, 山田朋人, 渡部靖憲, 猿渡亜由未, 大塚淳一, 森信人, 馬場康之, 水谷英朗, 久保輝広, 二宮順一, 内山雄介

  Feb. 2017, 土木学会北海道支部論文報告集(CD-ROM), (73) (73), ROMBUNNO.B‐04, Japanese


• 半閉鎖性海域湾口部における成層期および成層崩壊期の流動構造と海水交換について

  内山雄介, 吉木智軌, 多田拓晃, 馬場康之, 水谷英朗, 久保輝広, 森信人, 猿渡亜由未, 大塚淳一, 二宮順一, 渡部靖憲, 山田朋人

  2016, 土木学会論文集 B2(海岸工学)(Web), 72(2) (2)


• Marine observation with disdrometer under strong wind condition

  Okachi Hiroki, Yamada Tomohito, Watanabe Yasunori, Saruwatari Alum, Otuka Junichi, Mori Nobuhito, Baba Yasuyuki, Mizutani Hideaki, Kubo Teruhiko, Ninomiya Junnichi, Uchiyama Yuusuke

  Associated with global warming, the effects of sea level rise are linked to frequency and intensity of storms and other weather events. Previous researches argue that sea spray affects the development of typhoons. This study reports a marine observation on Tanabe bay near Wakayama Prefecture utilizing a measurement instrument called parsivel. Parsivel can detect the diameter of a droplet and the distribution of velocity. In our observation point, we reveal the presence of spray droplets with 1.5mm ~ 5.510mm diameter when typhoon events occurs in 2015. We discuss the relationship between sea spray and wind velocity when storm events occurs.<br>

  水文・水資源学会, 2016, Proceeding of Annual Conference, 29(0) (0), 35 - 35, Japanese


• ディスドロメータを用いた飛沫粒径分布の風速及び高度依存性

  岡地寛季, 山田朋人, 渡部靖憲, 猿渡亜由未, 大塚淳一, 馬場康之, 水谷英朗, 久保輝広, 二宮順一, 内山雄介, 森信人

  02 Sep. 2015, 地球環境シンポジウム講演集, 23rd, 149 - 150, Japanese


• A Coastal Circulation Model for Continental Shelves and Surf Zones

  Uchiyama, Y

  Coastal circulation models applicable to shallow seas ranging from continental shelves to surf zones are essential to add dynamical roles played by surface gravity waves and a multiple nesting technique to account properly for phase-averaged wave forcing and offshore oceanic signals simultaneously. Uchiyama et al(. 2010)developed a ROMS-WEC model based on a multi- scale asympto

  Coastal Oceanography Research Comittee, the Oceanographic Society of Japan, Feb. 2015, Bulletin on Coastal Oceanography, Vol.52(2) (2), 149 - 158, Japanese

  [Refereed][Invited]

  Introduction scientific journal


• 陸域起源放射性核種の海域移行定量化を目的とした領域土砂輸送モデルの開発

  山西 琢文, 内山 雄介, 津旨 大輔

  土木学会, Sep. 2014, 地球環境シンポジウム講演集, 22, 211 - 215, Japanese


• Water Temperature Variation at the Mouth of Tanabe Bay during Typhoon Passing

  馬場康之, 水谷英朗, 久保輝広, 内山雄介, 森信人, 渡部靖憲, 大塚淳一, 山田朋人, 猿渡亜由未, 二宮順一

  2014, 土木学会論文集 B2(海岸工学)(Web), 70(2) (2)


• 干潟のながれと地形変化

  UCHIYAMA YUSUKE

  日本流体力学会, 2005, ながれ, 24(1) (1), 57 - 66, Japanese

  [Invited]

  Introduction scientific journal


• 海辺の快適さと環境要因

  UCHIYAMA YUSUKE

  港湾海岸防災協議会, 2000, 波となぎさ, 144, 69 - 73, Japanese

  [Invited]

  Introduction commerce magazine


• Formation of Streak Structure Generated by Wind-driven Current in Nearshore Region

  NADAOKA Kazuo, UCHIYAMA Yusuke

  Jul. 1997, 年会一般講演, 16, 507 - 508, Japanese


• Field Observation of Shallow Water Environments in Summer on Sandy Beach in a Bay

  NADAOKA Kazuo, UCHIYAMA Yusuke, SEZAKI Tomoyuki

  Jul. 1996, 年会一般講演, 15, 445 - 446, Japanese


• Large Eddy Simulation of Organized Structure in Turbulent Flow around a Plant Canopy Layer

  NADAOKA Kazuo, UCHIYAMA Yusuke, HIGASHIKAWA Kouji

  Jul. 1996, 年会一般講演, 15, 397 - 398, Japanese

• Numerical weather prediction : East Asian perspectives

  Takatama, K, Wells, J.C, Uchiyama, Y, Miyoshi, T

  Contributor, Simulating rapid water level decrease of Lake Biwa due to Typhoon Jebi (2018), Springer, 2023, English, ISBN: 9783031405662


• ラングミュア循環の物理 – 沿岸域への影響：砕波帯周辺で生じる3次元組織渦構造

  内山雄介

  Contributor, 沿岸域への影響：砕波帯周辺で生じる3次元組織渦構造, 月刊海洋, Vol. 51, No. 8, 海洋出版, pp. 406–412., Aug. 2019


• Surface gravity and capillary waves

  Uchiyama, Y

  Others, Elsevier, Mar. 2019, English

  Dictionary or encycropedia

  DOI


• Multiscale routes to supply nutrients through the Kuroshio nutrient stream, In: Kuroshio Current: Physical, Biogeochemical and Ecosystem Dynamics

  Nagai, T, Clayton, S, Uchiyama, Y

  Others, John Wiley & Sons, Mar. 2019, English, Multiscale routes to supply nutrients through the Kuroshio nutrient stream, In: Kuroshio Current: Physical, Biogeochemical and Ecosystem Dynamics, Geophysical Monograph Series, Eds: Nagai, T., Saito, H., Suzuki, K. and Takahashi, M., John Wiley & Sons, NY, ISBN: 1119428343

  Scholarly book


• Encyclopedia of Ocean Sciences 3rd Edition

  Uchiyama, Y

  Joint editor, Academic Press, Mar. 2019, English, ISBN: 9780128130810

  Dictionary or encycropedia


• ゼロから学ぶ土木の基本 水理学

  UCHIYAMA YUSUKE

  Single work, オーム社, Jan. 2013, Japanese, ISBN: 9784274213205

  Textbook

• 海洋流動・物質循環カップリングモデルを用いた洋上風力発電施設の魚礁効果評価システム開発の試み

  内山雄介

  第172回海洋技術フォーラム, Sep. 2023

  [Invited]

  Invited oral presentation


• 国際的な情報発信の重要性～Coastal Engineering Journal を例に～

  内山雄介

  第58回水工学に関する夏期研修会，B コース（海岸・港湾）, Aug. 2023

  [Invited]

  Public discourse


• Wave effects on Lagrangian transport and dispersal in the nearshore zone

  Uchiyama, Y, Kataoka, K, Takeyasu, K, Mitarai, S

  20th Annual Meeting of Asia Oceania Geosciences Society (AOGS2023), Singapore.

  Oral presentation


• 広島湾におけるマイクロプラスチック輸送過程の数値解析

  内山雄介, 引野昇真, 乳原 材, 小硲大地

  日本地球惑星科学連合2023年大会（JpGU2023），5/21-5/26/2023，幕張メッセ，千葉．, May 2023

  Oral presentation


• Submesoscale eddy-induced mixing and transports in East Asian marginal seas

  Uchiyama, Y

  Flow Physics and Informatics Laboratory Seminar, Dept. Civil and Environ. Eng., Seoul National University, Korea, Jan. 2023

  [Invited]

  Public discourse


• Fate of river-derived microplastics from the South China Sea

  Uchiyama, Y, Matsushita, K, Takaura, N, Kosako, T

  PICES 2022 Annual Meeting: Sustainability of Marine Ecosysts through global knowledge networks, Busan, Korea, Sep. 2022, English

  Oral presentation


• A Post-disaster Assessment on a Storm-induced Flood and Associated Coastal Dispersal of the River-derived Suspended Radiocesium Originated from the Fukushima Nuclear Accident

  Yusuke Uchiyama

  2nd International Conference on Civil and Environmental Engineering (ICCEE2022), Jan. 2022, English

  [Invited]

  Keynote oral presentation


• Generation mechanism of tidally-driven submesoscale eddies in an estuary

  Uchiyama, Y

  Kobe University Academic Research and Education Forum on Water and Environment co-organized with The University of Western Australia (online), Nov. 2021, English

  [Invited]

  Nominated symposium


• Marine environmental assessments in Japan based on a multi-nested 3-D circulation model

  Uchiyama, Y

  The 3rd JSCE-CCES Joint Symposium Online, Oct. 2021, English

  [Invited]

  Invited oral presentation


• Generation Mechanism of Tidally-driven Whirlpools at a Narrow Strait in an Estuary

  Uchiyama, Y, Zhang, X, Yanase, S

  4th International Symposium on Green and Sustainable Technology (ISGST) 2021 (online), Oct. 2021, English

  Oral presentation


• マルチクラス3次元懸濁質輸送モデルを用いた福島沿岸域における陸域起源懸濁態放射性核種動態の解析

  内山雄介, 東 晃平, 徳永夏樹

  2021年度日本海洋学会秋季大会（オンライン開催）, Sep. 2021, Japanese

  Oral presentation


• 鳴門海峡でなぜ渦が発生するか

  内山雄介

  渦の魅力フォーラム2021（オンライン開催）, May 2021, Japanese

  [Invited]

  Public discourse


• 最先端の計算科学技術と海洋環境研究

  内山雄介

  EMECS海洋環境科学セミナー2020, Dec. 2020, Japanese

  [Invited]

  Public discourse


• 海の仕事に就きたい人へ〜学部の選択と卒業後のキャリアパス，

  内山雄介

  EMECS海洋環境科学セミナー2020, Dec. 2020, Japanese

  [Invited]

  Public discourse


• A robust regional downscaling ocean modeling for the Kuroshio region off Japan

  Uchiyama, Y

  Ocean Sciences Meeting 2020, San Diego, CA, USA., English

  [Invited]

  Invited oral presentation


• Effects of Wave Streaming and Wave Variations on Nearshore Wave-driven Circulation

  Wang, P, McWilliams, J.C, Uchiyama, Y, Chekroun, M

  Ocean Sciences Meeting 2020, San Diego, CA, USA., English

  Oral presentation


• Biogeochemical responses to seasonal oceanic variability around a ridge area along the Kuroshio off Japan

  Zhang, X, Uchiyama, Y, Suzue, Y, Yamazaki, H

  Ocean Sciences Meeting 2020, San Diego, CA, USA., English

  Poster presentation


• Identification of coral spawn supply source for restoration of the Sekisei Lagoon within the Kuroshio region

  Kashima, M, Takeda, N, Odani, S, Uchiyama, Y, Kamidaira, Y, Mitarai, S

  AGU Fall Meeting 2019, San Francisco, CA, USA, English

  Poster presentation


• Nearshore transport of suspended radiocesium in the Fukushima coast derived from Niida River during Typhoon Wipha in fall 2013

  Uchiyama, Y

  Joint special seminar of CRIEPI and IER - A Lagrangian model analysis of spatiotemporal particle behavior for radiocesium and marine food chain transfer, Institute of Environmental Radioactivity, Fukushima University, Fukushima, Japan. (invited), Nov. 2019, English

  [Invited]

  Nominated symposium


• How the Kuroshio enriches the southern coast of Japan and its downstream regions?

  Nagai, T, Duran, S, Otero, D, Yoshie, N, Ohgi, K, Hasegawa, D, Clayton, S, Uchiyama, Y

  PICES-2019 – Connecting Science and Communities in a Changing North Pacific, Victoria, BC, Canada, English

  Oral presentation


• 沖縄本島周辺海域におけるラグランジュ粒子追跡によるサンゴ浮遊幼生のコネクティビティ数値解析

  内山雄介, 小谷瑳千花, 宮川 翼

  2019年度日本海洋学会秋季大会，富山国際会議場, Japanese

  Oral presentation


• Mass and Heat Transport Generated by the Kuroshio and Tides Investigated with a High Resolution Downscaled Regional Oceanic Model

  Masunaga, E, Kimura, W, Kosako, T, Uchiyama, Y

  AOGS 16th Annual Meeting (AOGS 2019), Singapore, English

  Oral presentation


• Medium-term water mass exchange and associated regional circulations in the South China Sea

  Takaura, N, Uchiyama, Y, Nizamani, Z, Nakayama, A

  AOGS 16th Annual Meeting (AOGS 2019), Singapore, English

  Oral presentation


• A flood-induced sediment and suspended radiocesium transports in the Fukushima Coast due to Typhoon 201326 analyzed with a JCOPE2-ROMS downscaling model and in situ observations

  Tokunaga, N, Uchiyama, Y, Tsumune, D, Yamada, M, Tateda, Y, Ito, Y, Ishimaru, T, Watanabe, Y, Ikehara, K, Fukuda, M

  AOGS 16th Annual Meeting (AOGS 2019), Singapore, English

  Oral presentation


• Kuroshio-derived pinch-off mesoscale eddies: Generation, propagation, and recollision with the Kuroshio

  Uchiyama, Y, Okada, N, Dong, C

  AOGS 16th Annual Meeting (AOGS 2019), Singapore, English

  Oral presentation


• Biogeochemical responses to seasonal oceanic variability along the Kuroshio

  Zhang, X, Uchiyama, Y, Suzue, Y, Yamazaki, H

  AOGS 16th Annual Meeting (AOGS 2019), Singapore, English

  Oral presentation


• Eddy-induced transports and meso- and submesoscale dynamics in coastal and shelf seas

  Uchiyama, Y.

  Gordon Research Conference - Coastal Ocean Dynamics, Southern New Hampshire University, NH, USA., English

  [Invited]

  Invited oral presentation


• Implementing regional downscaling capability in the STREAMER ocean prediction system based on multi-nested ROMS model（多段ネストROMSモデルに基づいたSTEAMERにおけるダウンスケーリング機能の実装）

  Kamidaira, Y, Kawamura, H, Kobayashi, T, Uchiyama, Y

  Japan Geoscience Union Meeting 2019 (JpGU 2019), Chiba, Japan, Japanese

  Oral presentation


• Transport processes around the Izu-chain islands investigated with a Lagrangian particle tracking model（Lagrange粒子追跡モデルを用いた伊豆諸島周辺海域の物質輸送・拡散の評価）

  Kimura, W, Masunaga, E, Kosako, T, Uchiyama, Y

  Japan Geoscience Union Meeting 2019 (JpGU 2019), Chiba, Japan, Japanese

  Oral presentation


• Multiscale routes to supply nutrients through the Kuroshio nutrient stream

  Nagai, T, Clayton, S, Uchiyama, Y

  Japan Geoscience Union Meeting 2019 (JpGU 2019), Chiba, Japan, English

  Oral presentation


• A reanalysis of regional circulations in the Southern South China Sea using a HYCOM-ROMS downscaling ocean model（HYCOM-ROMSモデルを用いた南シナ海南部における海洋流動構造に関する研究）

  Takaura, N, Uchiyama, Y, Nizamani, Z, Nakayama, A

  Japan Geoscience Union Meeting 2019 (JpGU 2019), Chiba, Japan, Japanese

  Oral presentation


• Neasrshore transport of suspended radiocesium In the Fuksima Coast derived from Niida River induced by Typhoon Wipha（新田川河口海域における台風Wilpaによる出水イベントに伴う懸濁態放射性セシウムの沿岸輸送について）

  Tokunaga, N, Uchiyama, Y, Tsumune, D, Yamada, M, Tateda, Y, Ito, Y, Ishimaru, T, Watanabe, Y, Ikehara, K, Fukuda, M

  Japan Geoscience Union Meeting 2019 (JpGU 2019), Chiba, Japan, Japanese

  Oral presentation


• Fates and dynamical roles of pinch-off mesoscale eddies originated from the Kuroshio Extension Jet（黒潮続流ジェットから放出される切離中規模渦の挙動と力学的効果について）

  Uchiyama, Y, Okada, N, Dong, C

  Japan Geoscience Union Meeting 2019 (JpGU 2019), Chiba, Japan, English

  Oral presentation


• Biogeochemical responses to seasonal oceanic variability along the Kuroshio

  Zhang, X, Uchiyama, Y, Suzue, Y, Yamazaki, H

  Japan Geoscience Union Meeting 2019 (JpGU 2019), Chiba, Japan, English

  Oral presentation


• 海洋モデリング技術を用いた南シナ海の海洋構造物に作年用する外力評価，

  高浦 育, 内山雄介

  2019年度土木学会関西支部次学術講演会講演要旨集，大阪大学 吹田キャンパス, May 2019, Japanese

  Oral presentation


• 新田川から放出された懸濁態放射性核種の沿岸域での輸送特性について

  徳永夏樹, 内山雄介

  2019年度土木学会関西支部年次学術講演会講演要旨集，大阪大学 吹田キャンパス, May 2019, Japanese

  Oral presentation


• Evolution of downscaling ocean modeling and its application to the metocean forcing evaluation for offshore structures around Malaysia

  Uchiyama, Y

  Offshore Engineering Lecture Series at Civil and Environmental Engineering Department, Universiti Teknologi Petronas, Bandar Seri Iskandar, Perak, Malaysia, Apr. 2019, English

  [Invited]

  Public discourse


• Multiple-scale variations of wind-generated wave in the Southern California Bight

  Cao, Y, Dong, C, Uchiyama, Y, Wang, J, Yin, X

  20th Pacific Asian Marginal Seas (PAMS 2019), Mar. 2019, English, Kaohsiung, Taiwan, International conference

  Poster presentation


• Interisland coral connectivity across the Nansei Archipelago, the East China Sea: Dynamical influences of the Kuroshio

  Uchiyama, Y, Odani, S, Kashima, M, Kamidaira, Y, Mitarai, S

  20th Pacific Asian Marginal Seas (PAMS 2019), Mar. 2019, English, Kaohsiung, Taiwan, International conference

  Oral presentation


• A medium-term reanalysis of synoptic circulations in the South China Sea using a HYCOM-ROMS downscaling ocean model

  Takaura, N, Uchiyama, Y, Zafarullah, N, Nakayama, A

  20th Pacific Asian Marginal Seas (PAMS 2019), Mar. 2019, English, Kaohsiung, Taiwan, International conference

  Poster presentation


• A preliminary analysis of a newly-developed regional ocean data assimilation system: A case of Tokyo Bay in summer

  Takatama, K, Kurosawa, K, Uchiyama, Y, Miyoshi, T

  7th International Symposium on Data Assimilation (ISDA2019), Jan. 2019, English, Kobe, Japan, International conference

  Oral presentation


• Nonlinear internal waves and mixing generated by an interaction of background flows and tides

  Masunaga, E, Uchiyama, Y, Yamazaki, H

  AGU Fall Meeting 2018, Dec. 2018, English, Washington D.C., USA, International conference

  Oral presentation


• Enhancement of interisland coral connectivity by the Kuroshio across the Nansei Archipelago, the East China Sea

  Uchiyama, Y, Odani, S, Kashima, M, Kamidaira, Y, Mitarai, S

  AGU Fall Meeting 2018, Dec. 2018, English, Washington D.C., USA, International conference

  Oral presentation


• Can alternative operations at a sewage treatment plant reduce accumulation of the effluent in an adjacent seaweed farm?

  Zhang, X, Uchiyama, Y

  AGU Fall Meeting 2018, Dec. 2018, English, Washington D.C., USA, International conference

  Poster presentation


• Analysis on 3D structures of oceanic mesoscale eddies in the North Pacific by using a velocity-based eddy detection algorithm

  Okada, N, Uchiyama, Y, Dong, C

  AGU Fall Meeting 2018, Dec. 2018, English, Washington D.C., USA, International conference

  Poster presentation


• 石西礁湖周辺海域から石西礁湖内部へのサンゴ卵輸送の研究

  Takeda, N, Kashima, M, Odani, S, Uchiyama, Y

  日本サンゴ礁学会第21回大会, Nov. 2018, Japanese, 琉球大学, Domestic conference

  Poster presentation


• Downscaling ocean modeling and its application to coastal environmental problems

  Uchiyama, Y

  Special Seminar at Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman (UTAR), Nov. 2018, English, Kampar, Perak, Malaysia, International conference

  [Invited]

  Invited oral presentation


• 和歌山県田辺湾における海水交換特性の季節変化とその形成メカニズムに関する研究

  Okada, N, Uchiyama, Y

  平成30年度瀬戸内海研究フォーラム in 兵庫, Aug. 2018, Japanese, 神戸大学, Domestic conference

  Poster presentation


• Impacts of wastewater effluent on a seaweed farm in Osaka Bay in different discharge scenarios

  Zhang, X, Uchiyama, Y

  平成30年度瀬戸内海研究フォーラム in 兵庫, Aug. 2018, English, 神戸大学, Domestic conference

  Poster presentation


• 和歌山県田辺湾の海水交換に及ぼす海洋構造の周期的変動と風の影響について

  Okada, N, Uchiyama, Y

  H30年度複雑熱流体工学研究センター学生発表会, Jul. 2018, Japanese, 神戸大学, Domestic conference

  Poster presentation


• Numerical assessment of sewage effluent on a seaweed farm in the northeastern Seto Inland Sea, Japan

  Zhang, X, Uchiyama, Y

  H30年度複雑熱流体工学研究センター学生発表会, Jul. 2018, English, 神戸大学, Domestic conference

  Poster presentation


• Multiple-scale variations of wind-wave in the Southern California Bight

  Cao, Y, Dong, C, Uchiyama, Y, Wang, J, Yin, X

  2nd International Workshop on Regional Ocean Modeling and Observation, Jul. 2018, English, Nanjing University of Information Science and Technology (NUIST), Nanjing, China, C, International conference

  Poster presentation


• Impacts of wastewater effluent on a seaweed farm in Osaka Bay in different discharge scenarios

  Zhang, X, Uchiyama, Y

  2nd International Workshop on Regional Ocean Modeling and Observation, Jul. 2018, English, Nanjing University of Information Science and Technology (NUIST), Nanjing, China, International conference

  Poster presentation


• A post-disaster assessment on coastal dispersal of suspended radio-cesium after the Fukushima nuclear accident with a coupled river-ocean-wave-sediment model

  Uchiyama, Y

  2nd International Workshop on Regional Ocean Modeling and Observation, Jul. 2018, English, Nanjing University of Information Science and Technology (NUIST), Nanjing, China, International conference

  [Invited]

  Invited oral presentation


• 台風出水に伴う新田川起源懸濁態放射性核種の沿岸域でのインベントリ解析

  Uchiyama, Y

  放射性物質環境動態・環境および生物への影響に関する学際共同研究2018年度キックオフ・シンポジウム, Jun. 2018, Japanese, 筑波大学, Domestic conference

  [Invited]

  Nominated symposium


• Seasonal variability of eddy-induced vertical nutrient flux and associated upper-ocean primary production along the Kuroshio

  Uchiyama, Y, Suzue, Y, Yamazaki, H

  AOGS 15th Annual Meeting (AOGS 2018), Jun. 2018, English, Honolulu, HI, USA, International conference

  Oral presentation


• Research on the multi-scale spatial and temporal variation of waves in the Southern California Bight

  Cao, Y, Dong, C, Uchiyama, Y, Wang, J, Yin, X

  AOGS 15th Annual Meeting (AOGS 2018), Jun. 2018, English, Honolulu, HI, USA, International conference

  Oral presentation


• Oceanic Dynamics and Modeling: Implications to marine biological connectivity studies

  Uchiyama, Y

  RinkaiHackathon2018, Jun. 2018, English, Marine Biological Laboratory, Hiroshima University at Mukaishima Island, Japan, International conference

  [Invited]

  Invited oral presentation


• Multiscale transport, stirring, and mixing processes to supply nutrients through the Kuroshio nutrient stream

  Nagai, T, Clayton, S, Uchiyama, Y

  Japan Geoscience Union Meeting 2018 (JpGU 2018), May 2018, English, Chiba, Japan, International conference

  Oral presentation


• Highly nonlinear internal waves excited by an interaction of tides and the Kuroshio, Japan

  Masunaga, E, Uchiyama, Y, Yamazaki, H

  Japan Geoscience Union Meeting 2018 (JpGU 2018), May 2018, English, Chiba, Japan, International conference

  Oral presentation


• Storm-driven flood and associated coastal dispersal of suspended radiocesium from Niida River: A high-resolution numerical assessment with a coupled river-ocean-wave-sediment model

  Uchiyama, Y, Aduma, K, Iwasaki, T, Odani, S, Kamidaira, Y, Tsumune, D, Shimizu, Y, Onda, Y

  European Geosciences Union General Assembly 2018 (EGU2018), Apr. 2018, English, Vienna, Austria, International conference

  Poster presentation


• On the Interaction of Eddies and Surface Waves in Southern California

  Akan, C, McWilliams, J.C, Uchiyama, Y, Romero, L

  2018 Ocean Sciences Meeting, Feb. 2018, English, Portland, OR, USA, International conference

  Oral presentation


• 石西礁湖周辺海域から黒潮下流域へのサンゴ卵輸送の研究

  Takeda, N, Kashima, M, Odani, S, Uchiyama, Y

  2017年度日本海洋学会秋季大会, Oct. 2017, Japanese, 仙台市, Domestic conference

  Oral presentation


• Submesoscale eddy-induced mixing and dispersion of radioactive tracer off the northeastern Pacific coast of Japan

  Kamidaira. Y, Kawamura, H, Kobayashi, T, Uchiyama, Y, Furuno, A

  AOGS 14th Annual Meeting (AOGS 2017), Aug. 2017, English, Singapore, International conference

  Oral presentation


• Numerical simulations of the interaction between internal waves and the Kuroshio Current over the Izu-Ogasawara Ridge

  Masunaga, E, Auger, G, Rayson, M, Fringer, O, Uchiyama, Y, Yamazaki, H

  AOGS 14th Annual Meeting (AOGS 2017), Aug. 2017, English, Singapore, International conference

  Oral presentation


• Inter-annual and seasonal variability of upper-ocean primary production along the Kuroshio off Japan

  Zhang, X, Uchiyama, Y

  AOGS 14th Annual Meeting (AOGS 2017), Aug. 2017, English, Singapore, International conference

  Oral presentation


• Impact of the Kuroshio on dispersal of coral spawn and larvae around Ryukyu Islands in the East China Sea

  Odani, S, Uchiyama, Y, Kashima, M, Kamidaira, Y, Mitarai, S

  AOGS 14th Annual Meeting (AOGS 2017), Aug. 2017, English, Singapore, International conference

  Oral presentation


• Eddy analysis in the North Pacific based on altimetry-derived surface currents

  Okada, N, Uchiyama, Y, Liu, Y, Dong, C

  AOGS 14th Annual Meeting (AOGS 2017), Aug. 2017, English, Singapore, International conference

  Oral presentation


• A high-resolution coastal forecasting system with a 3DVAR assimilation optimal for a semi-enclosed estuary

  Kurosawa, K, Uchiyama, Y, Miyoshi, T

  AOGS 14th Annual Meeting (AOGS 2017), Aug. 2017, English, Singapore, International conference

  Oral presentation


• 海洋表層地衡流を用いた eddy tracking による北太平洋における中規模渦の発生伝播特性の解析

  Okada, N, Uchiyama, Y

  平成29年度土木学会関西支部年次学術講演会, May 2017, Japanese, 大阪工業大学，大阪市, Domestic conference

  Oral presentation


• Numerical simulations of internal wave dynamics in the vicinity of Izu-Oshima Island, off Sagami Bay, Japan

  Masunaga, E, Suzue, Y, Uchiyama, Y, Yamazaki, H

  JpGU-AGU Joint Meeting 2017, May 2017, English, Chiba, Japan, International conference

  Oral presentation


• On generation and propagation of oceanic mesoscale eddies in the North Pacific analyzed with an eddy-tracking algorithm

  Okada, N, Uchiyama, Y, Liu, Y, Dong. C

  19th Pacific-Asian Marginal Seas Meeting (PAMS 2017), Apr. 2017, English, Jeju, South Korea, International conference

  Poster presentation


• Model assessment of wastewater effluent on a seaweed farm in Osaka Bay, Japan

  Zhang, X, Uchiyama, Y, Suzue, Y

  19th Pacific-Asian Marginal Seas Meeting (PAMS 2017), Apr. 2017, English, Jeju, South Korea, International conference

  Poster presentation


• Meridional transition of upper-ocean primary productivity due to diapycnal eddy mixing across the Kuroshio off Japan

  Uchiyama, Y, Suzue, Y, Yamazaki, H

  19th Pacific-Asian Marginal Seas Meeting (PAMS 2017), Apr. 2017, English, Jeju, South Korea, International conference

  Oral presentation


• Intrinsic low-frequency variability in transient three-dimensional rip currents

  Uchiyama, Y, McWilliams, J.C, Akan, C

  19th Pacific-Asian Marginal Seas Meeting (PAMS 2017), Apr. 2017, English, Jeju, South Korea, International conference

  Poster presentation


• Drop size distribution under severe wind condition in marine observation and wind-tunnel experiment

  Okachi, H, Yamada, T.J, Watanabe, Y, Saruwatari, A, Ohtsuka, J, Mori, N, Baba, Y, Mizutani, H, Kubo, T, Ninomiya, J, Uchiyama, Y

  European Geosciences Union General Assembly 2017 (EGU2017), Apr. 2017, English, Vienna, Austria, International conference

  Oral presentation


• Development of a coastal forecasting system with a 3DVAR assimilation for the Seto Inland Sea, Japan

  Kurosawa, K, Uchiyama, Y, Miyoshi, T

  19th Pacific-Asian Marginal Seas Meeting (PAMS 2017), Apr. 2017, English, Jeju, South Korea, International conference

  Poster presentation


• 福島原発由来の放射性核種の環境動態に関する学際的研究（3）海洋における放射性物質の分布状況・要因の把握

  Yamada, M, Aoyama, M, Ikehara, K, Inomata, Y, Uematsu, M, Uchiyama, Y, Kaeriyama, H, Kato, Y, Kusakabe, M, Kumamoto, Y, Takahata, N, Tazoe, H, Zhang, K, Tsubono, T, Tsumune, D, Tsung. T, Nagai, S, Hamajima, Y, Honda, M, Misumi, K, Yang, K

  第18回環境放射能研究会, Mar. 2017, Japanese, 筑波大学，茨城県筑波市, Domestic conference

  Oral presentation


• Evolution of high-resolution regional ocean modeling: applications to waste water and larval dispersal in an estuary

  Uchiyama, Y

  2nd International Symposium on Green and Sustainable Technology (ISGST2017), Jan. 2017, English, Kampar, Malaysia, International conference

  Keynote oral presentation


• Quantifying coastal connectivity of coral spawn and larvae around Ryukyu Islands in the East China Sea

  Odani, S, Uchiyama, Y, Yamanishi, T, Kamidaira, Y, Mitarai, S

  AGU Fall Meeting 2016, Dec. 2016, English, San Francisco, CA, USA, International conference

  Poster presentation


• Modeling nearshore dispersal of river-derived multi-class suspended sediments and radionuclides during a flood event around the mouth of Niida River, Fukushima, Japan

  Uchiyama, Y, Yamanishi, T, Iwasaki, T, Shimizu, Y, Tsumune, D, Misumi, K, Onda, Y

  AGU Fall Meeting 2016, Dec. 2016, English, San Francisco, CA, USA, International conference

  Oral presentation


• Impact of a diversion of sewage effluent on a seaweed farm in the Seto Inland Sea, Japan

  Zhang, X, Uchiyama, Y, Suzue, Y

  AGU Fall Meeting 2016, Dec. 2016, English, San Francisco, CA, USA, International conference

  Poster presentation


• Development of a three-dimensional variational data assimilation system for the Seto Island Sea, Japan

  Kurosawa, K, Uchiyama, Y

  AGU Fall Meeting 2016, Dec. 2016, English, San Francisco, CA, USA, International conference

  Poster presentation


• Subtidal and semi-duirnal intrusion of offshore water into Tanabe Bay predicated upon a comprehensive field observation and a high-resolution down-scaling ocean modeling

  Uchiyama, Y

  International workshop on field measurements in fluvial and coastal areas and the utilization of the observed data, Nov. 2016, English, Wakayama, Japan, International conference

  Keynote oral presentation


• 台風通過に伴う黒潮流路変動および紀伊水道への暖水波及について

  Tada, H, Uchiyama, Y

  2016年度日本海洋学会秋季大会, Sep. 2016, Japanese, 鹿児島大学，鹿児島市, Domestic conference

  Oral presentation


• 船舶搭載用コンパクト海洋モデルの構築とウェザールーティングへの応用

  Kurosawa, K, Uchiyama, Y, Kosako, T, Tada, H

  2016年度日本海洋学会秋季大会, Sep. 2016, Japanese, 鹿児島大学，鹿児島市, Domestic conference

  Oral presentation


• 沖縄本島周辺海域におけるメソスケール渦の消長とそれに伴う黒潮反流の季節変動について

  Odani, S, Uchiyama, Y, Yamanishi, T, Mitarai, S

  2016年度日本海洋学会秋季大会, Sep. 2016, Japanese, 鹿児島大学，鹿児島市, Domestic conference

  Oral presentation


• ROMS-NPZDモデルを用いた黒潮域における 一次生産に対するメソスケール海洋変動の影響評価

  Suzue, Y, Uchiyama, Y, Yamazaki, H

  2016年度日本海洋学会秋季大会, Sep. 2016, Japanese, 鹿児島大学，鹿児島市, Domestic conference

  Oral presentation


• Utilizing a regional ocean model for weather routing for optimal vessel navigation

  Kurosawa, K, Uchiyama, Y, Kosako, T, Tada, H

  AOGS 13th Annual Meeting (AOGS 2016), Aug. 2016, English, Beijing, China, International conference

  Oral presentation


• Upper ocean dynamics and associated water exchange at the entrance of a semi-enclosed bay based on an in-situ ADCP measurement

  Uchiyama, Y, Yoshiki, T, Tada, H, Baba, Y, Mizutani, H, Kubo, T, Mori, N, Saruwatari, A, Otsuka, J, Ninomiya, J, Watanabe, Y, Yamada, T

  AOGS 13th Annual Meeting (AOGS 2016), Aug. 2016, English, Beijing, China, International conference

  Oral presentation


• Surface mixing and dispersion of radioactive tracer due to submesoscale eddies off the northeastern Pacific coast of Japan

  Kamidaira, Y, Kawamura, H, Kobayashi, T, Uchiyama, Y

  AOGS 13th Annual Meeting (AOGS 2016), Aug. 2016, English, Beijing, China, International conference

  Oral presentation


• Seasonal and inter-annual variability of larval dispersal and ambient currents in the Seto Inland Sea, Japan

  Kosako, T, Uchiyama, Y, Mitarai, S

  AOGS 13th Annual Meeting (AOGS 2016), Aug. 2016, English, Beijing, China, International conference

  Oral presentation


• Modeling coastal dispersal of wastewater effluent from multiple sources in the Seto Inland Sea

  Zhang, X, Uchiyama, Y, Suzue, Y

  AOGS 13th Annual Meeting (AOGS 2016), Aug. 2016, English, Beijing, China, International conference

  Oral presentation


• Influences of meso- and submeso-scale oceanic variability on the primary production in the Kuroshio region off Japan

  Suzue, Y, Uchiyama, Y, Yamazaki, H

  AOGS 13th Annual Meeting (AOGS 2016), Aug. 2016, English, Beijing, China, International conference

  Oral presentation


• Impacts of typhoons on upper-ocean mixing and the Kuroshio in the northwestern Pacific Ocean

  Tada, H, Uchiyama, Y

  AOGS 13th Annual Meeting (AOGS 2016), Aug. 2016, English, Beijing, China, International conference

  Oral presentation


• Asymmetric oceanic responses around Okinawa Island in the East China Sea

  Odani, S, Uchiyama, Y, Yamanishi, T, Kamidaira, Y, Mitarai, S

  AOGS 13th Annual Meeting (AOGS 2016), Aug. 2016, English, Beijing, China, International conference

  Oral presentation


• 細密気象・海象情報とグラフ理論を統合した最適航路評価法の開発

  Kurosawa, K, Uchiyama, Y

  平成28年度土木学会関西支部年次学術講演会, Jun. 2016, Japanese, 立命館大学，滋賀県草津市, Domestic conference

  Oral presentation


• 沖縄本島周辺海域におけるリッジ地形による海洋構造の非対称性に関する研究

  Odani, S, Uchiyama, Y

  平成28年度土木学会関西支部年次学術講演会, Jun. 2016, Japanese, 立命館大学，滋賀県草津市, Domestic conference

  Oral presentation


• ADCP観測に基づく半閉鎖性海域湾口部における海表面境界層内の力学特性に関する研究

  Yoshiki, T, Uchiyama, Y

  平成28年度土木学会関西支部年次学術講演会, Jun. 2016, Japanese, 立命館大学，滋賀県草津市, Domestic conference

  Oral presentation


• 細密気象・海象情報とグラフ理論を統合した最適航路評価法の開発

  Kurosawa, K, Uchiyama, Y, Kosako, T, Tada, H

  日本航海学会H28年度春季大会, May 2016, Japanese, 神戸市, Domestic conference

  Oral presentation


• Wave-current interaction in coastal and shelf seas

  Uchiyama, Y

  International Workshop on Regional Oceanic Modelling and Observation, May 2016, English, Nanjing, China, International conference

  [Invited]

  Invited oral presentation


• Impact of mesoscale recirculation of the Kuroshio on asymmetric oceanic structure around Okinawa Island in the East China Sea

  Odani, S, Uchiyama, Y, Yamanishi, T, Kamidaira, Y, Mitarai, S

  Japan Geosciences Union Meeting 2016 (JpGU 2016), May 2016, English, Chiba, Japan, International conference

  Poster presentation


• Forcing mechanism controlling the variability of circulations and associated larval transport in the Seto Inland Sea, Japan

  Uchiyama, Y, Kosako, T, Mitarai, S

  Japan Geosciences Union Meeting 2016 (JpGU 2016), May 2016, English, Chiba, Japan, International conference

  Oral presentation


• Coastal ocean processes responsible for radionuclide dispersion: A case study for Seto Inland Sea and Enshu-nada

  Masumoto, Y, Tsumune, D, Guo, X, Uchiyama, Y, Miyazawa, Y

  Japan Geosciences Union Meeting 2016 (JpGU 2016), May 2016, English, Chiba, Japan, International conference

  Oral presentation


• Three-dimensional modeling of oceanic dispersal of land-derived multi-class suspended radionuclides after the Fukushima Dai-ichi accident

  Uchiyama, Y, Yamanishi, T, Tsumune, D, Misumi, K, Onda, Y

  European Geosciences Union General Assembly 2016 (EGU2016), Apr. 2016, English, Vienna, Austria, International conference

  Poster presentation


• 幼稚仔分散評価のための粒子追跡モデルの感度解析

  Kosako, T, Uchiyama, Y, Mitarai, S

  2016年度日本海洋学会春季大会・講演要旨集, Mar. 2016, Japanese, 東京大学本郷キャンパス，東京, Domestic conference

  Oral presentation


• 福島新田川周辺海域における出水イベントに伴う懸濁態放射性核種の分散解析

  Yamanishi, T, Uchiyama, Y, Iwasaki, T, Shimizu, Y, Tsumune, D, Misumi, K, Onda, Y

  2016年度日本海洋学会春季大会・講演要旨集, Mar. 2016, Japanese, 東京大学本郷キャンパス，東京, Domestic conference

  Oral presentation


• マルチクラス懸濁質輸送モデルによる福島沿岸域堆積物シミュレーション

  Uchiyama, Y

  2016年度沿岸海洋シンポジウム：震災復興に対する沿岸海洋学の貢献, Mar. 2016, Japanese, 東京大学本郷キャンパス，東京, Domestic conference

  [Invited]

  Invited oral presentation


• Topographic effects on low-frequency variability in three-dimensional transient littoral currents

  Uchiyama, Y, McWilliams, J.C, Akan, C

  Ocean Sciences Meeting 2016, Feb. 2016, English, New Orleans, LA, USA, International conference

  Poster presentation


• Near-inertial resonance, upper-ocean stirring and impacts on the Kuroshio path due to typhoons in the northwestern Pacific Ocean

  Tada, H, Uchiyama, Y

  Ocean Sciences Meeting 2016, Feb. 2016, English, New Orleans, LA, USA, International conference

  Poster presentation


• Characterizing Stormwater Dispersion and Dilution from Small Coastal Streams

  Romero, L, Siegel, D.A, McWilliams, J.C, Uchiyama, Y, Jones, C

  Ocean Sciences Meeting 2016, Feb. 2016, English, New Orleans, LA, USA, International conference

  Oral presentation


• Biogeochamical responses to meso- and submesoscale oceanic variability in the Kuroshio region

  Suzue, Y, Uchiyama, Y, Yamazaki, H

  Ocean Sciences Meeting 2016, Feb. 2016, English, New Orleans, LA, USA, International conference

  Poster presentation


• 津波・高潮による沿岸災害〜発生・伝播・増幅メカニズムと防災対策

  Uchiyama, Y

  第9回災害対策セミナー in Kobe，シンポジウム「神戸における自然災害の防止・減災を目指して」, Jan. 2016, Japanese, 神戸国際会議場, Domestic conference

  [Invited]

  Invited oral presentation


• Three-dimensional modeling of time-dependent wave-driven currents on a sandy beach

  Uchiyama, Y

  Seminar on Simulation of Coastal Processes, Nov. 2015, English, Kusatsu, Shiga, Japan, International conference

  [Invited]

  Invited oral presentation


• Near-inertial resonance and upper-ocean stirring due to typhoons in the northwestern Pacific margin

  Tada, H, Uchiyama, Y

  The 2nd Open Science Symposium on Western Pacific Ocean Circulation and Climate (2nd OSS-2015), Oct. 2015, English, Busan, South Korea, International conference

  Oral presentation


• Influences of submesoscale eddies on synoptic and mesoscale dynamics in the Japan Sea

  Uchiyama, Y, Miyazaki, D, Kanki, R

  The 2nd Open Science Symposium on Western Pacific Ocean Circulation and Climate (2nd OSS-2015), Oct. 2015, English, Busan, South Korea, International conference

  Oral presentation


• 福島沿岸域における浅海域・河川由来懸濁態放射性核種の海洋分散

  Yamanishi, T, Uchiyama, Y, Tsumune, D, Misumi, K

  2015年度日本海洋学会秋季大会・講演要旨集, Sep. 2015, Japanese, 愛媛大学，愛媛県松山市, Domestic conference

  Oral presentation


• 太平洋北西海域および黒潮域における台風通過に伴う海洋構造変化について

  Tada, H, Uchiyama, Y

  2015年度日本海洋学会秋季大会・講演要旨集, Sep. 2015, Japanese, 愛媛大学，愛媛県松山市, Domestic conference

  Oral presentation


• 黒潮離接岸に伴う瀬戸内海内部における幼稚仔分散の変動特性

  Kosako, T, Uchiyama, Y, Mitarai, S

  2015年度日本海洋学会秋季大会・講演要旨集, Sep. 2015, Japanese, 愛媛大学，愛媛県松山市, Domestic conference

  Oral presentation


• 伊予灘および遠州灘沿岸域における陸域起源物質海洋分散の季節変動特性

  Suzue, Y, Uchiyama, Y

  2015年度日本海洋学会秋季大会・講演要旨集, Sep. 2015, Japanese, 愛媛大学，愛媛県松山市, Domestic conference

  Oral presentation


• Submesoscale stirring of the Kuroshio in the East China Sea

  Uchiyama, Y

  International symposium on Submesoscale Oceanography : Prospect for a new world, JOS Fall Meeting 2015, Sep. 2015, English, Matsuyama, Japan, International conference

  [Invited]

  Invited oral presentation


• Modeling oceanic responses to typhoons in the northwestern Pacific margin

  Uchiyama, Y, Tada, H

  AOGS 12th Annual Meeting (AOGS 2015), Aug. 2015, English, Singapore, International conference

  Oral presentation


• Anisotropic Relative Dispersion near the Southern California Coast

  Romero, L, Uchiyama, Y, Ohlmann, C, McWilliams, J.C, Siegel, D.A

  Lagrangian Analysis and Prediction of Coastal and Ocean Dynamics (LAPCOD2015), Jul. 2015, English, Winter Harbor, MA, USA, International conference

  Oral presentation


• 北太平洋西岸海域における台風通過に伴う海洋構造変化に関する研究

  Tada, H, Uchiyama, Y

  平成27年度土木学会関西支部年次学術講演会・講演概要集, May 2015, Japanese, 摂南大学，大阪府寝屋川市, Domestic conference

  Oral presentation


• 原子力発電所からの放射性物質の漏洩を想定した海洋拡散シミュレーション手法の構築 (3) －瀬戸内海，関東・東海，東北沿岸モデルの比較－

  Uchiyama, Y

  海洋放射能汚染緊急対応予測モデルに関するワークショップ, May 2015, Japanese, 福島大学，福島県福島市, Domestic conference

  [Invited]

  Nominated symposium


• Offline passive tracerモデルの開発と瀬戸内海西部海域への適用

  Suzue, Y, Uchiyama, Y

  平成27年度土木学会関西支部年次学術講演会・講演概要集, May 2015, Japanese, 摂南大学，大阪府寝屋川市, Domestic conference

  Oral presentation


• Modeling dispersal of land-derived suspended radionuclides in the Fukushima coast

  Yamanishi, T, Uchiyama, Y, Onda, Y, Tsumune, D, Misumi, K

  Japan Geoscience Union Meeting 2015 (JpGU2015), May 2015, English, Chiba, Japan, International conference

  Oral presentation


• Coastal dispersal of the land-derived tracer in an estuary and a continental shelf margin

  Uchiyama, Y, Suzue, Y

  Japan Geoscience Union Meeting 2015 (JpGU2015), May 2015, English, Chiba, Japan, International conference

  [Invited]

  Invited oral presentation


• Topographic effects on submesoscale eddy mixing around the Kuroshio off the Ryukyu Islands

  Uchiyama, Y, Kamidaira, Y

  18th Pacific-Asian Marginal Seas Meeting (PAMS 2015), Apr. 2015, English, Naha, Japan, International conference

  Oral presentation


• Oceanic and coastal responses to super typhoons in the northwestern Pacific marginal seas

  Tada, H, Uchiyama, Y

  18th Pacific-Asian Marginal Seas Meeting (PAMS 2015), Apr. 2015, English, Naha, Japan, International conference

  Oral presentation


• Effects of fluctuating Kuroshio path on larval dispersal in the Seto Inland Sea

  Kosako, T, Uchiyama, Y, Mitarai, S

  18th Pacific-Asian Marginal Seas Meeting (PAMS 2015), Apr. 2015, English, Naha, Japan, International conference

  Poster presentation


• Coastal dispersal of Eulerian passive tracer: Comparative experiments in an estuary and a continental shelf margin

  Suzue, Y, Uchiyama, Y

  18th Pacific-Asian Marginal Seas Meeting (PAMS 2015), Apr. 2015, English, Naha, Japan, International conference

  Poster presentation


• 波−流れ相互作用〜海浜流・漂砂・沿岸流動解析への応用

  Uchiyama, Y

  港湾空港技術研究所平成26年度海岸工学特別講演会, Jan. 2015, Japanese, 独立行政法人港湾空港技術研究所, 横須賀, Domestic conference

  [Invited]

  Invited oral presentation


• Wave-current interaction in evolution of rip channel system

  Uchiyama, Y, Miyazaki, D, Kaida, H

  AGU Fall Meeting 2014, Dec. 2014, English, San Francisco, CA, USA, International conference

  Oral presentation


• Potential utility of three-dimensional temperature and salinity fields estimated from satellite altimetry and Argo data for improving mesoscale reproducibility in regional ocean modeling

  Kanki, R, Uchiyama, Y, Miyazaki, D, Takano, A, Miyazawa, Y, Yamazaki, H

  AGU Fall Meeting 2014, Dec. 2014, English, San Francisco, CA, USA, International conference

  Oral presentation


• Modeling larval dispersal and quantifying coastal connectivity based on a downscaling ocean model in Seto Inland Sea, Japan

  Kosako, T, Uchiyama, Y, Mitarai, S

  AGU Fall Meeting 2014, Dec. 2014, English, San Francisco, CA, USA, International conference

  Poster presentation


• Impact of submesoscale eddies on synoptic and mesoscale oceanic structures in a continental shelf margin analyzed with a downscaling ocean model of Japan Sea

  Miyazaki, D, Uchiyama, Y, Kanki, R, Miyazawa, Y

  AGU Fall Meeting 2014, Dec. 2014, English, San Francisco, CA, USA, International conference

  Poster presentation


• Enhancement of eddy heat transport due to the anticyclonic submesoscale eddies around Ryukyu Islands near Kuroshio in East China Sea

  Kamidaira, Y, Uchiyama, Y, Mitarai, S, Miyazawa, Y

  AGU Fall Meeting 2014, Dec. 2014, English, San Francisco, CA, USA, International conference

  Poster presentation


• A regional sediment transport modeling for assessing dispersal and recirculation of land-derived radionuclides in the Fukushima coast

  Yamanishi, T, Uchiyama, Y, Tsumune, D, Miyazawa, Y

  AGU Fall Meeting 2014, Dec. 2014, English, San Francisco, CA, USA, International conference

  Poster presentation


• 陸棚循環流に対する波-流れ相互作用の効果について

  Uchiyama, Y, Kaida, H

  日本流体力学会年会2014講演論文集, Sep. 2014, Japanese, Domestic conference

  Oral presentation


• 陸域起源放射性核種の海域移行定量化を目的とした領域土砂輸送モデルの開発

  Yamanishi, T, Uchiyama, Y, Tsumune, D, Miyazawa, Y

  第22回地球環境シンポジウム講演集, Sep. 2014, Japanese, 土木学会, Domestic conference

  Poster presentation


• 日本海全域を対象とした高解像度ROMSモデルによる海況評価

  Miyazaki, D, Uchiyama, Y, Kanki, R, Miyazawa, Y

  2014年度日本海洋学会秋季大会・講演要旨集, Sep. 2014, Japanese, Nagasaki University, Nagasaki, Japan, Domestic conference

  Oral presentation


• 東シナ海におけるサブメソスケール乱流混合による黒潮暖流の輸送効果の解析

  Kamidaira, Y, Uchiyama, Y

  2014年度日本海洋学会秋季大会・講演要旨集, Sep. 2014, Japanese, Nagasaki University, Nagasaki, Japan, Domestic conference

  Oral presentation


• 渦解像ダウンスケール海洋モデリングにおけるデータ同化によるメソスケール海洋構造の再現精度について

  Kanki, R, Uchiyama, Y, Miyazaki, D, Takano, A, Miyazawa, Y, Yamazaki, H

  2014年度日本海洋学会秋季大会・講演要旨集, Sep. 2014, Japanese, Nagasaki University, Nagasaki, Japan, Domestic conference

  Oral presentation


• コネクティビティを用いた瀬戸内海全域における海洋生態系ネットワーク構造の定量的評価

  Kosako, T, Uchiyama, Y, Mitarai, S

  2014年度日本海洋学会秋季大会・講演要旨集, Sep. 2014, Japanese, Nagasaki University, Nagasaki, Japan, Domestic conference

  Oral presentation


• Regional circulation and dispersal in Seto Inland Sea with offshore influences: Towards an effective estuarine environmental protection strategy

  Uchiyama, Y

  クリタ水・環境科学研究優秀賞受賞講演会, Sep. 2014, English, Tokyo, Japan, Domestic conference

  [Invited]

  Invited oral presentation


• Inner Shelf Dispersion and Dilution of Creek Runoff

  Romero, L, Uchiyama, Y, Siegel, D.A, McWilliams, J

  61st Annual Eastern Pacific Ocean Conference (EPOC 2014), Sep. 2014, English, Mt. Hood, OR, USA, International conference

  Oral presentation


• Topographic effects of Ryukyu Islands on the enhancement of submesoscale anticyclonic eddies on the eastern side of Kuroshio in East China Sea

  Kamidaira, Y, Uchiyama, Y, Mitarai, S, Miyazawa, Y

  AOGS 11th Annual Meeting (AOGS 2014), Jul. 2014, English, Sapporo, Japan, International conference

  Oral presentation


• Stochastic analysis with coastal connectivity on larval networks in the Seto Inland Sea

  Kosako, T, Uchiyama, Y, Mitarai, S, Nishii, T

  AOGS 11th Annual Meeting (AOGS 2014), Jul. 2014, English, Sapporo, Japan, International conference

  Poster presentation


• Experimental development of ocean prediction system for accidental radionuclide dispersion

  Masumoto, Y, Guo, X, Hirose, N, Ikeda, M, Mitsudera, H, Miyazawa, Y, Tsumune, D, Uchiyama, Y

  AOGS 11th Annual Meeting (AOGS 2014), Jul. 2014, English, Sapporo, Japan, International conference

  Poster presentation


• Effects of wave-current interaction on the inner-shelf eddying flows

  Kaida, H, Uchiyama, Y, McWilliams, J

  AOGS 11th Annual Meeting (AOGS 2014), Jul. 2014, English, Sapporo, Japan, International conference

  Oral presentation


• Development of a regional sediment transport model for dispersal of land-derived radionuclides in the ocean

  Yamanishi, T, Uchiyama, Y, Tsumune, D, Miyazawa, Y

  AOGS 11th Annual Meeting (AOGS 2014), Jul. 2014, English, Sapporo, Japan, International conference

  Oral presentation


• Cold water formation in response to typhoon passages in and around Seto Inland Sea, Japan

  Uchiyama, Y, Nishii, T

  AOGS 11th Annual Meeting (AOGS 2014), Jul. 2014, English, Sapporo, Japan, International conference

  Oral presentation


• A retrospective high-resolution numerical experiment of Japan Sea with a JCOPE2-ROMS downscaling system

  Miyazaki, D, Uchiyama, Y, Kanki, R, Miyazawa, Y

  AOGS 11th Annual Meeting (AOGS 2014), Jul. 2014, English, Sapporo, Japan, International conference

  Oral presentation


• A sediment transport model for analyzing the environmental dynamics of radionuclides in estuarine and coastal oceans

  Uchiyama, Y, Yamanishi, T, Tsumune, D, Miyazawa, Y

  Japan Geoscience Union Meeting 2014 (JpGU2014), May 2014, Japanese, Yokohama, Japan, International conference

  Oral presentation


• 太平洋全域における海表面二酸化炭素フラックスと海洋酸性化について

  Matsuyama, M, Kamidaira, Y, Uchiyama, Y

  平成26年度土木学会関西支部年次学術講演会・講演概要集, May 2014, Japanese, 土木学会関西支部, Domestic conference

  Oral presentation


• 瀬戸内海全域を対象としたコネクティビティによる海洋生態系ネットワーク構造の解析

  Kosako, T, Uchiyama, Y

  平成26年度土木学会関西支部年次学術講演会・講演概要集, May 2014, Japanese, 土木学会関西支部, Domestic conference

  Oral presentation


• 外洋影響を考慮した紀伊半島田辺湾周辺海域の海洋構造に関する研究

  Matsukawa, D, Uchiyama, Y

  平成26年度土木学会関西支部年次学術講演会・講演概要集, May 2014, Japanese, 土木学会関西支部, Domestic conference

  Oral presentation


• Heat budget analysis on cooling events associated with typhoon passages in Seto Inland Sea, Japan

  Uchiyama, Y, Nishii, T

  Japan Geoscience Union Meeting 2014 (JpGU2014), May 2014, English, Yokohama, Japan, International conference

  Oral presentation


• 琉球諸島周辺海域におけるサブメソスケール乱流混合による 黒潮系水塊の波及促進効果の解析

  Kamidaira, Y, Uchiyama, Y, Mitarai, S, Miyazawa, Y, Sakagami, T

  2014年度日本海洋学会春季大会・講演要旨集, Mar. 2014, Japanese, 東京海洋大学品川キャンパス, Domestic conference

  Oral presentation


• 陸棚から砕波帯までを考慮した沿岸流動モデル

  Uchiyama, Y

  2014年度春季沿岸海洋研究シンポジウム−沿岸高解像モデルの現在と未来 (1) 沿岸海洋物理現象の再現に向けて－, Mar. 2014, Japanese, 東京海洋大学品川キャンパス, Domestic conference

  [Invited]

  Invited oral presentation


• 放射性核種の海域移行定量化に向けた沿岸土砂輸送モデルの開発

  Yamanishi, T, Uchiyama, Y, Tsumune, D, Miyazawa, Y

  2014年度日本海洋学会春季大会・講演要旨集, Mar. 2014, Japanese, 東京海洋大学品川キャンパス, Domestic conference

  Oral presentation


• 波−流れ相互作用がサブメソスケール渦の発達に及ぼす影響について

  Kaida, H, Uchiyama, Y, McWilliams, J

  2014年度日本海洋学会春季大会・講演要旨集, Mar. 2014, Japanese, 東京海洋大学品川キャンパス, Domestic conference

  Oral presentation


• JCOPE2-ROMS ダウンスケーリングシステムによる日本海全域の海況評価

  Miyazaki, D, Uchiyama, Y, Kanki, R, Miyazawa, Y

  2014年度日本海洋学会春季大会・講演要旨集, Mar. 2014, Japanese, Domestic conference

  Oral presentation


• Wave-current interaction in the surfzone-inner shelf circulations

  Kaida, H, Uchiyama, Y, McWilliams, J

  Ocean Sciences Meeting 2014, Feb. 2014, English, Honolulu, HI, USA, International conference

  Poster presentation


• Nearshore anisotropic relative dispersion in Southern California

  Romero, L, Uchiyama, Y, Ohlmann, J.C, McWilliams, J.C, Siegel, D.A

  Ocean Sciences Meeting 2014, Feb. 2014, English, Honolulu, HI, USA, International conference

  Poster presentation


• Model-Data Comparison of Surfzone and Inner-Shelf Circulation during HB06

  Kumar, N, Feddersen, F, Uchiyama, Y, McWilliams, J.C, O'Reilly, W

  Ocean Sciences Meeting 2014, Feb. 2014, English, Honolulu, HI, USA, International conference

  Oral presentation


• Cooling the upper ocean around Seto Inland Sea due to typhoons

  Nishii, T, Uchiyama, Y, Mori, N, Baba, Y

  Ocean Sciences Meeting 2014, Feb. 2014, English, Honolulu, HI, USA, International conference

  Poster presentation


• 福島第一原発からの放射性核種の沿岸海洋拡散再解析

  Uchiyama, Y

  Model & Simulation研究会, Dec. 2013, Japanese, 東北大学青葉記念会館, Domestic conference

  [Invited]

  Invited oral presentation


• 福島第一原発を放出源とする放射性核種の初期分散特性

  Yamanishi, T, Uchiyama, Y, Tsumune, D, Miyazawa, Y

  2013年度日本海洋学会秋季大会・講演要旨集, Sep. 2013, Japanese, Hokkaido University, Sapporo, Japan, Domestic conference

  Oral presentation


• 波-流れ相互作用による離岸流の抑制効果が海浜地形変化に及ぼす影響

  Miyazaki, D, Uchiyama, Y, Kaida, H

  日本流体力学会年会2013講演論文集, Sep. 2013, Japanese, Domestic conference

  Oral presentation


• 波−流れ相互作用を考慮した砕波帯−陸棚間の混合過程に関する数値解析

  Kaida, H, Uchiyama, Y, McWilliams, J

  2013年度日本海洋学会秋季大会・講演要旨集, Sep. 2013, Japanese, Hokkaido University, Sapporo, Japan, Domestic conference

  Oral presentation


• 東シナ海におけるサブメソスケール乱流混合による黒潮系水塊の波及促進効果について

  Kamidaira, Y, Uchiyama, Y, Mitarai, S, Sakagami, T

  日本流体力学会年会2013講演論文集, Sep. 2013, Japanese, Domestic conference

  Oral presentation


• 大阪湾における3段階ネスティングによる高解像度モデルを用いた下水処理水分散シミュレーション

  Kanki, R, Uchiyama, Y, Nakayama, A

  日本流体力学会年会2013講演論文集, Sep. 2013, Japanese, Domestic conference

  Oral presentation


• 紀伊半島沿岸域における台風通過に伴う海水温低下機構

  Nishii, T, Uchiyama, Y, Mori, N, Baba, Y

  2013年度日本海洋学会秋季大会・講演要旨集, Sep. 2013, Japanese, Hokkaido University, Sapporo, Japan, Domestic conference

  Oral presentation


• Wave-current interaction in morphological change on a barred beach

  Miyazaki, D, Uchiyama, Y, Kaida, H

  32nd Int'l Conf. on Simulation Technology (JSST2013), Sep. 2013, English, Tokyo, Japan, International conference

  Oral presentation


• Wastewater dispersal in Osaka Bay and Harima Nada using a multi-nested high-resolution ocean modeling

  Kanki, R, Uchiyama, Y, Nakayama, A

  32nd Int'l Conf. on Simulation Technology (JSST2013), Sep. 2013, English, Tokyo, Japan, International conference

  Oral presentation


• Surfzone-inner shelf interaction analyzed with a quintuple nested high resolution ocean model

  Kaida, H, Uchiyama, Y

  32nd Int'l Conf. on Simulation Technology (JSST2013), Sep. 2013, English, Tokyo, Japan, International conference

  Oral presentation


• Principal component analysis on horizontal acoustic Doppler current profilers measurement

  Phan, T.N.M, Wells, J.C, Uchiyama, Y, Bonner, J.S, Islam, M.S, Kirkey, W.D

  Oceans 2013 MTS/IEEE, Sep. 2013, English, San Diego, CA, USA, International conference

  Oral presentation


• A numerical study of effects of submesoscale anticyclonic eddies induced by Kuroshio around Ryukyu Islands

  Kamidaira, Y, Uchiyama, Y, Mitarai, S, Sakagami, T

  32nd Int'l Conf. on Simulation Technology (JSST2013), Sep. 2013, English, Tokyo, Japan, International conference

  Oral presentation


• 3次元海浜流が砕波帯-陸棚間の物質交換に及ぼす影響について

  Kaida, H, Uchiyama, Y, McWilliams, J

  日本流体力学会年会2013講演論文集, Sep. 2013, Japanese, Domestic conference

  Oral presentation


• Wave-current interaction in inner shelf circulation: a high resolution regional ocean modeling with a vortex-force formalism

  Uchiyama, Y

  International Workshop on Ocean Waves and Related Processes, Jul. 2013, English, Yokohama, Japan, International conference

  [Invited]

  Invited oral presentation


• 神戸垂水沖を点源とする大阪湾・播磨灘における処理水分散に関する高解像度海洋シミュレーション

  Kanki, R, Uchiyama, Y

  土木学会関西支部年次学術講演会・講演概要集, May 2013, Japanese, Domestic conference

  Oral presentation


• リップチャンネルの形成に及ぼす流れから波へのフィードバック機構の影響について

  Miyazaki, D, Uchiyama, Y

  土木学会関西支部年次学術講演会・講演概要集, May 2013, Japanese, Domestic conference

  Oral presentation


• サブメソスケール乱流混合による琉球諸島周辺海域への黒潮系水塊の波及効果について

  Kamidaira, Y, Uchiyama, Y

  土木学会関西支部年次学術講演会・講演概要集, May 2013, Japanese, Domestic conference

  Oral presentation


• Initial oceanic dispersion mechanism of radionuclides released from Fukushima

  Uchiyama, Y, Yamanishi, T, Tsumune, D, Miyazawa, Y

  Japan Geoscience Union Meeting 2013, May 2013, English, Chiba, Japan, International conference

  Oral presentation


• 流路変動に伴う黒潮系水塊の瀬戸内海への波及について

  Kuriyama, T, Uchiyama, Y, Miyazawa, Y

  2013年度日本海洋学会春季大会・講演要旨集, Mar. 2013, Japanese, TUMSAT, Tokyo, Japan, Domestic conference

  Oral presentation


• 超高解像度3次元海洋モデルによる砕波帯‐陸棚相互作用の解析

  Kaida, H, Uchiyama, Y, McWilliams, J

  2013年度日本海洋学会春季大会・講演要旨集, Mar. 2013, Japanese, TUMSAT, Tokyo, Japan, Domestic conference

  Oral presentation


• 黒潮続流フロント周辺におけるサブメソスケール渦の発生機構

  Ishii, S, Uchiyama, Y, Miyazawa, Y

  2013年度日本海洋学会春季大会・講演要旨集, Mar. 2013, Japanese, TUMSAT, Tokyo, Japan, Domestic conference

  Oral presentation


• Typhoons alter dispersal patterns in the Kuroshio Current system

  Mitarai, S, Uchiyama, Y, Sakagami, T, Molemaker, M.J, Siegel, D.A, McWilliams, J

  ASLO Aquatic Sciences Meeting 2013, Feb. 2013, English, New Orleans, LA, USA, International conference

  Invited oral presentation


• Submesoscale Frontal Dynamics in the Kuroshio Extension Jet

  Ishii, S, Uchiyama, Y, Miyazawa, Y

  AGU Fall Meeting 2012, Dec. 2012, English, San Francisco, CA, USA, International conference

  Oral presentation


• Impact of the Kurishio paths on oceanic and estuarine circulations in and around Seto Inland Sea, Japan

  Kuriyama, T, Uchiyama, Y, Miyazawa, Y

  AGU Fall Meeting 2012, Dec. 2012, English, San Francisco, CA, USA, International conference

  Oral presentation


• Coastal dispersal of radionuclides released from the Fukushima Nuclear Power Plant

  Uchiyama, Y, Ishii, T, Tsumune, D, Miyazawa, Y

  AGU Fall Meeting 2012, Dec. 2012, English, San Francisco, CA, USA, International conference

  Oral presentation


• A method to characterize the spatial structure of superdepth-scale near-bank vortices, with a view to operational monitoring

  Wells, J.C, Miyazawa, Y, Phan, T.N.M, Nguyen, L.V, Susuki, Y, Kirkey, W.D, Islam, M.S, Fuller, C.B, Bonner, J.S, Uchiyama, Y

  1st International Conference on Frontiers in Computational Physics: Modeling the Earth System, Dec. 2012, English, Boulder, CO, USA, International conference

  Oral presentation


• 黒潮続流域におけるフロント不安定とサブメソスケール乱流への遷移について

  Uchiyama, Y, Ishii, S, Miyazawa, Y

  日本流体力学会年会2012講演論文集, Sep. 2012, Japanese, Domestic conference

  Oral presentation


• Transient thermal plume dispersal in the Hudson River estuary

  Uchiyama, Y, Ishii, S, Phan, T.M, Wells, J, Islam, M, Kirkey, W, Bonner, J

  ASLO Aquatic Sciences Meeting 2012, Jul. 2012, English, Otsu, Japan, International conference

  Oral presentation


• Oceanic circulations in the Southern California Bight from a multi-nested high-resolution forward model

  Uchiyama, Y

  International Symposium on Watercourse Sensing and Operational Monitoring, Jul. 2012, English, Otsu, Japan, International conference

  [Invited]

  Invited oral presentation


• Interaction between the Kuroshio intrusion and intrinsic variability in Seto Inland Sea, Japan

  Kuriyama, T, Uchiyama, Y, Miyazawa, Y

  ASLO Aquatic Sciences Meeting 2012, Jul. 2012, English, Otsu, Japan, International conference

  Oral presentation


• A downscaling experiment on reproducibility of the Kuroshio off Japan

  Ishii, S, Uchiyama, Y, Miyazawa, Y

  ASLO Aquatic Sciences Meeting 2012, Jul. 2012, English, Otsu, Japan, International conference

  Oral presentation


• 離岸流の発達に及ぼす流れから波へのフィードバック機構の影響

  Kaida, H, Uchiyama, Y

  土木学会関西支部年次学術講演会・講演概要集, May 2012, Japanese, Domestic conference

  Oral presentation


• 福島第一原子力発電所から漏洩した放射性物質の海洋分散特性

  Ishii, T, Uchiyama, Y

  土木学会関西支部年次学術講演会・講演概要集, May 2012, Japanese, Domestic conference

  Oral presentation


• 高解像度領域海洋モデルを用いた沿岸海洋流動に及ぼす波浪の影響に関する研究

  Nishii, T, Uchiyama, Y

  土木学会関西支部年次学術講演会・講演概要集, May 2012, Japanese, Domestic conference

  Oral presentation


• Three-dimensional unsteady wave-driven littoral currents

  Uchiyama, Y, McWilliams, J

  4th International Workshop on Modeling the Ocean (IWMO-2012), May 2012, English, Yokohama, Japan, International conference

  Oral presentation


• Oceanic responses to surface gravity waves in the Southern California Bight

  Nishii, T, Uchiyama, Y, McWilliams, J

  4th International Workshop on Modeling the Ocean (IWMO-2012), May 2012, English, Yokohama, Japan, International conference

  Poster presentation


• Oceanic dispersion of cesium-137 off the north-eastern Pacific coast of Japan

  Ishii, T, Uchiyama, Y, Tsumune, D, Miyazawa, Y

  4th International Workshop on Modeling the Ocean (IWMO-2012), May 2012, English, Yokohama, Japan, International conference

  Poster presentation


• Effects of wave-current interaction on development of rip currents

  Kaida, H, Uchiyama, Y

  4th International Workshop on Modeling the Ocean (IWMO-2012), May 2012, English, Yokohama, Japan, International conference

  Poster presentation


• 東北・北関東太平洋沿岸域における放射性物質の海洋分散

  Uchiyama, Y, Ishii, T, Tsumune, D, Miyazawa, Y

  2012年度日本海洋学会春季大会・講演要旨集, Mar. 2012, Japanese, Tsukuba, Ibaragi, Japan, Domestic conference

  Oral presentation


• 瀬戸内海流動シミュレーションの高精度化に向けたダウンスケーリングによる黒潮流動のモデリング

  Kuriyama, T, Uchiyama, Y, Miyazawa, Y

  2012年度日本海洋学会春季大会・講演要旨集, Mar. 2012, Japanese, Tsukuba, Ibaragi, Japan, Domestic conference

  Oral presentation


• ROMS を用いた黒潮の流況再現とダウンスケーリング効果の検証

  Ishii, S, Uchiyama, Y, Miyazawa, Y

  2012年度日本海洋学会春季大会・講演要旨集, Mar. 2012, Japanese, Tsukuba, Ibaragi, Japan, Domestic conference

  Oral presentation


• Nearshore dispersion of the radioactive cesium 137 leaked from the Fukushima I Power Plant

  Uchiyama, Y, Ishii, T

  The Third Korea-Japan Mini Symposium on Modeling and Measurements of Hydraulic Flows, Mar. 2012, English, 神戸大学大学院工学研究科市民工学専攻, Department of Civil Engineering, Kobe University, International conference

  Oral presentation


• Highly-resolved computations in the Hudson River Estuary

  Phan, T.M, Uchiyama, Y, Bonner, J, Ojo, T, Wells, J, Fuller, C, Islam, M, Kirkey, W, Ishii, S, Nishii, T

  Ocean Sciences Meeting, Feb. 2012, English, Salt Lake City, UT, USA, International conference

  Poster presentation


• 多段ネスティングを用いた高解像度領域海洋循環モデルによるサブメソスケール分散について

  Uchiyama, Y, McWilliams, J

  2011年度日本海洋学会秋季大会・講演要旨集, Sep. 2011, Japanese, Fukuoka, Japan, Domestic conference

  Oral presentation


• Wave-current interaction in a three-dimensional oceanic circulation model based on a vortex-force formalism: Applications to the surf-zone and inner-shelf circulations

  Uchiyama Yusuke

  Ocean Sciences Meeting 2010, Feb. 2010, English, American Geophysical Union, Portland, OR, USA, International conference

  [Invited]

  Invited oral presentation


• Non-tidal Variability in Semidiurnal Internal Tide Generation in the Southern California Bight

  Hill-Lindsay C, Buijsman M.C, Uchiyama Yusuke

  Ocean Sciences Meeting 2010, Feb. 2010, English, American Geophysical Union, Portland, OR, USA, International conference

  Poster presentation


• Applications of Regional Ocean Modeling System (ROMS) for surf zone environment

  Voulgaris G, Kumar N, Warner J.C, Haas K.A, Uchiyama Yusuke

  Ocean Sciences Meeting 2010, Feb. 2010, English, American Geophysical Union, Portland, OR, USA, International conference

  Poster presentation


• Wave-current interaction in ROMS: A vortex-force formalism

  Uchiyama Yusuke

  2009 ROMS/TOMS Asia-Pacific Workshop, 2009, English, University of New South Wales, Sydney, Australia, International conference

  Oral presentation


• Ensemble Data Assimilation for Idealized California Current System with ROMS-LETKF

  Miyoshi T, Ide K, McWilliams J.C, Li Z, Uchiyama Yusuke

  The 5th WMO Symposium on Data Assimilation, 2009, English, WMO, Melbourne, Australia, International conference

  Oral presentation


• Submesoscale instability in subtidal inner shelf circulation off Palos Verdes, California

  Uchiyama Yusuke

  Ocean Sciences Meeting 2008, Feb. 2008, English, American Geophysical Union, Orlando, FL, USA., International conference

  Oral presentation


• A high- resolution nested simulation on non-cohesive suspended sediment transport around Palos Verdes, California

  Uchiyama Yusuke

  2007 ROMS/TOMS Users Workshop, 2007, English, UCLA, Los Angeles, CA, USA, International conference

  Oral presentation


• Simulating forced infragravity long-waves with ROMS

  Uchiyama Yusuke

  Ocean Sciences Meeting 2006, Feb. 2006, English, American Geophysical Union, Honolulu, HI, USA., International conference

  Oral presentation


• Infragravity waves forced by surface wind waves in the central North Pacific Ocean

  Uchiyama Yusuke

  2005 ROMS/TOMS Users Workshop, 2005, English, Scripps Institute of Oceanography, La Jolla, CA, USA., International conference

  Oral presentation


• Intertidal sediment transport and morphological response in San Francisco Bay using modefied Princeton Ocean Model

  Uchiyama Yusuke

  AGU Chapmen Conference on Salt Marsh Geomorphology: Physical and Ecological Effects on Landform, 2004, English, American Geophysical Union, Halifax, NS, Canada, International conference

  Poster presentation


• Modeling wetting and drying process in San Francisco Bay using the Princeton Ocean Model

  Uchiyama Yusuke

  AGU Fall Meeting 2003, Dec. 2003, English, American Geophysical Union, San Francisco, CA, USA, International conference

  Poster presentation


• Near-bed velocity and turbidity measurements at an intertidal estuarine sand-flat influenced by fluvial discharges

  Uchiyama Yusuke

  EGS-AGU-EUG Joins Assembly, Apr. 2003, English, European Geophysical Society, Nice, France, International conference

  Poster presentation


• Hydrodynamic, sedimentological and morphological processes on Banzu intertidal sand-flat, Tokyo Bay, Japan

  Uchiyama Yusuke

  AGU Spring Meeting 2002, May 2001, English, American Geophysical Union, Washington DC, USA, International conference

  Oral presentation


• Coastal groundwater flow and associated nutrient transport into the sea

  Uchiyama Yusuke

  2nd Joint Meeting of the Coastal Environmental Science and Technology (CEST) Panel, 1999, English, UJNR, Washington DC, USA, International conference

  Oral presentation

• The Meteorological Society of Japan

  Apr. 2012 - Mar. 2022


• Asia Oceania Geosciences Society


• Japan Geoscience Union


• American Geophysical Union


• The Oceanographic Society of Japan


• Japan Society of Civil Engineers

• Coastal disasters induced by violent breaking waves

  渡部 靖憲, 猿渡 亜由未, 新井田 靖郎, 二宮 順一, 馬場 康之, 大塚 淳一, 志村 智也, 内山 雄介, 森 信人

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (A), Hokkaido University, 01 Apr. 2023 - 31 Mar. 2028


• 瀬戸内海アマモ場の結びつきの統一モデルの構築とメタ個体群動態の解明

  細川 真也, 百田 恭輔, 小硲 大地, 内山 雄介

  日本学術振興会, 科学研究費助成事業, 基盤研究(B), 国立研究開発法人海上・港湾・航空技術研究所, 01 Apr. 2022 - 31 Mar. 2025


• 瀬戸内海アマモ場の結びつきの統一モデルの構築とメタ個体群動態の解明

  細川 真也, 百田 恭輔, 小硲 大地, 内山 雄介

  日本学術振興会, 科学研究費助成事業, 基盤研究(B), 国立研究開発法人海上・港湾・航空技術研究所, 01 Apr. 2022 - 31 Mar. 2025


• 波浪を考慮した大気海面境界素過程の解明と沿岸災害への影響評価

  森 信人, 渡部 靖憲, 竹見 哲也, 内山 雄介, 馬場 康之, 金 洙列, 志村 智也, 二宮 順一, 豊田 将也, 福井 信気, 藤木 峻

  日本学術振興会, 科学研究費助成事業, 基盤研究(A), 京都大学, 01 Apr. 2019 - 31 Mar. 2023

  波浪境界層を考慮して大気海洋境界過程のパラメタリゼーションの定量化・汎用化とこれを用いた沿岸災害等の数値モデルへの影響評価を実施し，最大クラスの高潮・高波想定，大気や海洋の循環場へのモデル化と感度解析を行った．具体的な研究項目としては，(A) 大気海洋境界過程の現地観測，(B) 大気海洋境界面の素過程の解明と定量化，(C) 高潮・高波・台風の極端現象，大気・海洋の循環場への影響評価の3項目を実施した． 項目A 「大気海洋境界過程の現地観測」大気海洋境界過程定量化のための詳細な大気・海洋の観測を実施し，パラメータ空間をカバーするデータ解析を行った．項目Bにおける大気海洋境界面の素過程の解明・パラメタリゼーションのため，前年度に引き続き大気・海洋観測塔を用いた集中観測を継続し，低～高風速，風波・うねりの状態等をカバーする現地観測データセットの整備を行った． 項目B 「大気海洋境界面の素過程の解明と定量化」運動量交換係数，熱交換係数，海面粗度，砕波乱流の4つのパラメタリゼーションにつながる素過程のバルク式の見直しを行った．海面境界過程を波浪境界層理論をもとに風速と波浪の方向スペクトルを説明変数として考え，海面粗度高さについて枠組みの見直しを行った．波浪方向スペクトルをもとに運動量・熱交換過程，鉛直代表長さスケールをパラメタライズした．特に，砕波による海面表層での海洋の鉛直混合に着目し，パラメタリゼーションを行った． 項目C 「高潮・高波・台風の極端現象，大気・海洋の循環場への影響評価」項目Bで得られたパラメタリゼーションを用い，高潮・高波・台風の極端現象および大気・海洋の大循環場等への影響について定量的に検討した．


• 広域海洋動態・気候変動解析のためのマルチスケール統合型沿岸環境解析システムの開発

  内山 雄介

  科学研究費補助金／基盤研究(A), Apr. 2018 - Mar. 2023, Principal investigator

  Competitive research funding


• Identification of coral spawn major source area in the Nansei Archipelago within the Kuroshio region for coral reef restoration

  Kashima Motohiko

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Kobe Gakuin University, 01 Apr. 2017 - 31 Mar. 2020

  A surface particle tracking simulation of coral spawn and larvae with drifter observation was used to identify the inter-island connectivity of the coral spawn in the Nansei archipelago during its life span and the coral spawn major source areas for coral reef restoration. The northern coastal zone of the Iriomote Island, including the Hatoma Island, was identified as a major source area for both cases: (1) From the Japan’s largest coral lagoon in the Kuroshio upstream region called the Yaeyama islands, the exterior and interior Sekisei lagoon, to the Kuroshio downstream region in the Nansei archipelago including the Okinawa main island, and (2) from the exterior Sekisei lagoon to the interior. Additionally, there are hearty and sustainable coral reef conservation activities realized from the questionnaire survey and hearing investigation in the Ishigaki island.


• Development of a multi-scale integrated analysis system for coastal environmental studies and its application to synoptic-scale time-varying ocean dynamics

  Uchiyama Yusuke, McWilliams James C., Shchepetkin Alexander F., Marchesiello Patric, Baba Yasuyuki, Mitarai Satoshi

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Grant-in-Aid for Scientific Research (B), Kobe University, 01 Apr. 2015 - 31 Mar. 2019

  This study aimed at developing a novel oceanic modeling framework that integrates multi-scales and multi-processes occurred in coastal oceans. The system seamlessly concatenates processes in surf-zones, continental shelves, and offshore open waters. It is applicable to precise reanalysis and prediction with all the factors mandatory in coastal oceans such as currents, waves, river inputs, tides, wind stresses, etc., and their mutual interaction, by taking account of global signals through a nesting technique.


• マルチスケール統合型沿岸環境解析システム開発と変動環境下における広域海洋動態解析

  内山 雄介

  科学研究費補助金／基盤研究(B), Apr. 2015 - Mar. 2019, Principal investigator

  Competitive research funding


• 放射性核種の海域移行評価に向けた懸濁態・溶存態セシウム同時輸送解析システムの開発

  内山 雄介

  科学研究費補助金／新学術領域研究, Apr. 2015 - Mar. 2017, Principal investigator

  Competitive research funding


• 【CREST】黒潮域広域３次元海洋モデリング技術の開発と運用

  内山 雄介

  国立研究開発法人科学技術振興機構, 戦略的創造研究推進事業 チーム型研究（CREST）, 2017, Principal investigator

  Competitive research funding


• 【CREST】黒潮域広域３次元海洋モデリング技術の開発と運用

  内山 雄介

  国立研究開発法人科学技術振興機構, 戦略的創造研究推進事業（CREST）, 2016, Principal investigator

  Competitive research funding


• 放射性核種の海域移行定量化に向けた統合型河口・浅海域土砂輸送解析システムの開発

  内山 雄介

  科学研究費補助金／新学術領域研究, Apr. 2013 - Mar. 2015, Principal investigator

  Competitive research funding


• 波－流れ相互作用とサブメソスケール力学を考慮した沿岸海洋環境評価技術の高度化

  内山 雄介

  科学研究費補助金／基盤研究(C), Apr. 2012 - Mar. 2015, Principal investigator

  Competitive research funding


• マルチスケール統合型沿岸環境解析システム開発と変動環境下における広域海洋動態解析（国際共同研究強化）

  内山 雄介

  学術研究助成基金助成金／国際共同研究加速基金(国際共同研究強化), 2015, Principal investigator

  Competitive research funding


• 波－流れ相互作用を考慮した海洋モデルによる沿岸物質分散アセスメント技術の高度化

  内山 雄介

  科学研究費補助金／若手研究(スタートアップ), 2011, Principal investigator

  Competitive research funding


• 沿岸湿地・干潟における水理学および漂砂論

  Competitive research funding


• Hydrodynamics and Morphodynamics on Coastal Weelands and Intertidal Flats.

  Competitive research funding