研究者紹介システム
| 内山 雄介 |  |
| ウチヤマ ユウスケ | |
| 大学院工学研究科 市民工学専攻 | |
| 教授 | |
| 土木・建築工学関係 |
研究者情報
所属
【主配置】
大学院工学研究科 市民工学専攻【配置】
工学部 市民工学科
学位
研究シーズ
研究シーズ紹介サイトへのリンク授業科目
- 沿岸海洋学, 大学院工学研究科 市民工学専攻, 2021
- 広域流体運動論, 大学院工学研究科 市民工学専攻, 2021
- 熱・統計力学（-15）, 工学部 市民工学科, 2021
- 市民工学のための技術者倫理（-17）, 工学部 市民工学科, 2021
- 市民工学概論, 工学部 市民工学科, 2021
- 実験及び安全指導Ⅰ, 工学部 市民工学科, 2021
- 市民工学のための技術者倫理（18-）, 工学部 市民工学科, 2021
- 創造思考ゼミナールⅠ-a, 工学部 市民工学科, 2021
- 実験及び安全指導Ⅱ, 工学部 市民工学科, 2021
- 地球環境論, 工学部 市民工学科, 2021
- 創造思考ゼミナールⅠ-b, 工学部 市民工学科, 2021
- 海岸・港湾工学, 工学部 市民工学科, 2021
- 高度教養セミナー工学部（市民工学）, 工学部, 2021
ジャンル
コメントテーマ
研究活動
研究キーワード
研究分野
受賞
2021年10月 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
2021年05月 土木学会, 令和2年度土木学会賞・国際活動奨励賞
2020年10月 神戸大学工学部, 令和元年度優秀教育賞
2018年10月 Elsevier, Outstanding Contribution in Reviewing Award 2018, Ocean Modelling
2018年10月 Elsevier, Outstanding Contribution in Reviewing Award 2018, Progress in Oceanography
2018年07月 Elsevier, Outstanding Contribution in Reviewing Award 2018, Deep-Sea Research Part I
2017年10月 神戸大学, 平成29年度学長表彰
2016年09月 神戸大学工学部, 平成27年度優秀教育賞
2015年11月 Elsevier, Outstanding Contribution in Reviewing Award 2015, Continental Shelf Research
2015年10月 神戸大学工学部, 平成26年度優秀教育賞
2014年10月 Elsevier, Outstanding Contribution in Reviewing Award 2014, Ocean Modelling
2014年09月 神戸大学工学部, 平成25年度優秀教育賞
2014年09月 IAHR-APD, Best Paper Award 2014, On tridimensional rip current modeling
2014年08月 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
2014年03月 Elsevier, Most Cited Ocean Modelling Articles, Wave-current interaction in an oceanic circulation model with a vortex force formalism: Application to the surf zone
2013年09月 神戸大学工学部, 平成24年度優秀教育賞
論文
- Elsevier BV, 2021年11月, Journal of Environmental Radioactivity, 238-239, 106724 - 106724, 英語
[査読有り]
研究論文（学術雑誌）
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, 2021年11月, Science of The Total Environment, 816, 151573 - 151573, 英語, 国際誌[査読有り]
研究論文（学術雑誌）
Abstract 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, 2021年04月05日, Journal of Physical Oceanography, 英語[査読有り]
研究論文（学術雑誌）
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.
2021年03月26日, Scientific reports, 11 (1), 6963 - 6963, 英語, 国際誌[査読有り]
研究論文（学術雑誌）
- Japan Society of Civil Engineers, 2021年, 土木学会論文集B2（海岸工学）, 77 (2), I_1003 - I_1008
[査読有り]
研究論文（学術雑誌）
- Japan Society of Civil Engineers, 2021年, 土木学会論文集B2（海岸工学）, 77 (2), I_883 - I_888
[査読有り]
研究論文（学術雑誌）
- Japan Society of Civil Engineers, 2021年, 土木学会論文集B2（海岸工学）, 77 (2), I_169 - I_174
[査読有り]
研究論文（学術雑誌）
- Japan Society of Civil Engineers, 2021年, 土木学会論文集B2（海岸工学）, 77 (2), I_385 - I_390
[査読有り]
研究論文（学術雑誌）
- Japan Society of Civil Engineers, 2021年, 土木学会論文集B2（海岸工学）, 77 (2), I_373 - I_378
[査読有り]
研究論文（学術雑誌）
- Japan Society of Civil Engineers, 2021年, 土木学会論文集B2（海岸工学）, 77 (2), I_379 - I_384
[査読有り]
研究論文（学術雑誌）
Abstract 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, 2020年10月01日, Journal of Physical Oceanography, 50 (10), 3025 - 3041, 英語[査読有り]
研究論文（学術雑誌）
- 2020年09月, Proc. 22nd IAHR-APD Congress, 2-4-4 - 2-4-4High wave coniditions due to typhoons measured at an offshore observation tower
[査読有り]
研究論文（国際会議プロシーディングス）
© 2020 Rip currents arise from the momentum flux associated with depth-induced breaking of incident surface gravity waves on beaches with irregular bottom topography. In 3D simulations with an idealized topographic configuration, uniform density, and a steady incident wave field, a striking enhancement of transient surf eddy variability occurs over irregular topography compared to smooth topography, especially at nearly normal incident wave angles. Alternatively, with highly oblique incident waves, transient shear instability is observed over smooth topography whereas for irregular topography, standing rip eddies are generated. In the presence of larger-scale coastline variations, mega-rip circulations emerge, and they are especially strong for embayments. In all cases with significant transient surf-eddy activity, the eddy-induced mean horizontal transport is a non-trivial component of the total mean transport, and sometimes it is much larger than the gravity-wave Stokes drift. Typically the transport by the eddy-induced flow partially cancels the Eulerian transport by the time- and/or alongshore-averaged currents, but not by enough to reverse the “residual” pattern of total transport.
2020年03月, Ocean Modelling, 147[査読有り]
研究論文（学術雑誌）
© 2019 Elsevier Ltd The primary objective of this study is to develop a new weather routing system for vessel navigation in coastal and marginal seas based on the A-star algorithm. The cost function inherent in the original A-star algorithm is modified to account for oceanic and atmospheric conditions around the vessel of interest. Three options are introduced to search for optimal paths with the shortest travel distance, shortest travel time, and minimal fuel consumption. An avoidance algorithm for unsafe conditions is further incorporated to exempt any arbitrary area from the navigation solution. Furthermore, a compact ocean circulation model based on the Regional Ocean Modeling System executable on typical laptop PCs is configured for a vessel-borne weather routing system; the system is successfully applied to evaluate the optimal vessel paths in the Seto Inland Sea, where high-frequency tidal currents modified by complex topography make it essential to alter the vessel's speed.
2020年01月01日, Ocean Engineering, 195[査読有り]
研究論文（学術雑誌）
- Japan Society of Civil Engineers, 2020年, 土木学会論文集B2（海岸工学）, 76 (2), I_979 - I_984
[査読有り]
研究論文（学術雑誌）
- Japan Society of Civil Engineers, 2020年, 土木学会論文集B2（海岸工学）, 76 (2), I_97 - I_102
[査読有り]
研究論文（学術雑誌）
- Japan Society of Civil Engineers, 2020年, 土木学会論文集B2（海岸工学）, 76 (2), I_91 - I_96
[査読有り]
研究論文（学術雑誌）
- 土木学会, 2019年11月, 土木学会論文集B2(海岸工学), 75 (2), I_61 - I_66, 日本語
[査読有り]
研究論文（学術雑誌）
- 土木学会, 2019年11月, 土木学会論文集B2(海岸工学), 75 (2), I_271 - I_276, 日本語
[査読有り]
研究論文（学術雑誌）
Abstract The Kuroshio and tides significantly influence the oceanic environment off the Japanese mainland and promote mass/heat transport. However, the interaction between the Kuroshio and tides/internal waves has not been examined in previous works. To investigate this phenomenon, the two-dimensional high-resolution nonhydrostatic oceanic Stanford Unstructured Nonhydrostatic Terrain-Following Adaptive Navier–Stokes Simulator (SUNTANS) model was employed. The results show that strong internal tides propagating upstream in the Kuroshio are generated at a near-critical internal Froude number (Fri = 0.91). The upstream internal wave energy flux reaches a magnitude of 12 kW m−1, which is approximately 3 times higher than that of internal waves without the Kuroshio. On the other hand, under supercritical conditions, the Kuroshio suppresses the internal wave energy flux. The interaction of internal tides and the Kuroshio also generates upstream propagating high-frequency internal waves and solitary wave packets. The high-frequency internal waves contribute to the increase in the total internal wave energy flux up to 40% at the near-critical Fri value. The results of this study suggest that the interaction of internal tides and the Kuroshio enhances the upstream propagating internal tides under the specified conditions (Fri ~ 1), which may lead to deep ocean mixing and transport at significant distances from the internal wave generation sites.American Meteorological Society, 2019年11月, Journal of Physical Oceanography, 49 (11), 2917 - 2934, 英語[査読有り]
研究論文（学術雑誌）
© 2019 Author(s). The importance is given for the efficient design of offshore structures which should include economic and safety concerns. The properties of wind-generated (main) surface waves and currents are recognized to play a vital role during design of offshore structures such as windmills, fixed and floating structures. This study looks into the mechanisms of metocean forces, acting on these structures near the continental shelf region of Malaysia. At present, near offshore Malaysia, there is no real behaviour model available for currents and the interaction between waves and current. The free surface flow and rigid body interaction with structural issues of offshore structures such as fatigue, corrosion, and marine growth are also not researched in this region before. Therefore, current and wave-current models need to be developed using the finite volume method. Physics of these forces need to be determined and their free surface flow motions require the development of a framework. Fluid-structure interaction (FSI) is used to model the interfaces such as air-fluid (free surface) and fluid-structure (rigid-body). A Free-surface/rigid body problem fully coupled finite volume model is a preferred method. Six degree of freedom of motion equations are used to define the rigid body. This paper is based on literature review and the expected results due to the effects of wind on wave and currents and the mechanics of current are highlighted along with the seasonal effects of the current. To deal with the moving rigid body and the fluid domain interface an interface-tracking method is used.
2019年09月18日, AIP Conference Proceedings, 2157[査読有り]
研究論文（国際会議プロシーディングス）
© 2019 Author(s). A high-resolution, high-precision downscaling oceanic circulation model for the Southern China Sea (SCS) was developed based on the Regional Oceanic Modeling System (ROMS) at a lateral resolution of 5 km, initialized and forced by the HYbrid Coordinate Ocean Model (HYCOM) global reanalysis product. A multi-year reanalysis was conducted with the HYCOM-ROMS system that properly accounts for wind stress and heat budget at surface, freshwater influences from the atmosphere and major rivers, and tidal variability. Prospective applications of the system include assessments of oceanic dispersal of wastewater, quantification of marine ecosystem network, analyses of micro plastic transport and its coastal accumulation, etc. In prior to applied studies, we extensively investigated the validity and performance of the developed system. We found that it successfully reproduced primary dynamics of the SCS in many aspects such as the transient Kuroshio path in the south of Taiwan prominently affecting the circulation of the northern SCS through the Luzon Strait. The North Equatorial Current (NEC) drifting near Bismarck Archipelago, New Guinea, sporadically intrudes into the Indonesian water and adjacent seas to invoke bifurcating northward and westward currents. This intrusion promotes the northwestward mass transport into the Celebes Sea and further into the Sulu Sea, and then enters the SCS through the Palawan Strait.
2019年09月18日, AIP Conference Proceedings, 2157[査読有り]
研究論文（国際会議プロシーディングス）
© 2019 Author(s). Coastal dispersal of sewage effluent from the Tarumi Sewage Treatment Plant located in Osaka Bay, Japan, was investigated with a quadruple-nested high-resolution ROMS model coupled with a 3-D passive tracer model. The study area is quite famous for seaweed farming in the nation, which has been claimed considerably affected by the effluent from the plant, particularly in fall when the seaweed spores are most vulnerable to contamination that counteracts their favorable growth and productivity. We applied the model to three different discharge scenarios to explore possible optimal operations that could reduce the influences. If the discharged volume rate is simply decreased at ∼16.7% relative to the baseline case that represents the actual operation, the effluent accumulating in the farm is reduced at ∼25.4% showing a significant nonlinearity. A tracer flux analysis demonstrated that the transient component accounting for fluctuating tides and eddies dominates over the time-averaged linear contribution to the effluent accumulation in the cross-shore effluent transport to the farm. By contrast, in the along-shore direction, the linear component leads to increased influx near the surface at the western transect of the farm, while the transient component is more essential to the overall reduction of the incoming tracer flux to the farm. On the other hand, density adjustment of the effluent for suppressing surfacing of buoyant effluent plume released from the bottom-mounted diffusers does not work well as expected, because pronounced far-field dilution takes over the near-source dilution affected by the density adjustment.
2019年09月18日, AIP Conference Proceedings, 2157[査読有り]
研究論文（国際会議プロシーディングス）
© 2019 Author(s). Niida River, Fukushima, Japan, is well known to be a source of highly contaminated suspended radiocesium to the ocean, which is originated from the Fukushima Dai-ichi Nuclear Power Plant during the accidental leakage occurred in March 2011. We examined the oceanic dispersal and inventories of the sediments and suspended radiocesium in the ocean floor derived from Niida River, using a quadruple 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 radiocesium absorption model. A particular attention was paid to the storm and subsequent flood event associated with Typhoon 201326 (Wipha) passed off the Fukushima Coast in October 2013, which provoked an enormous amount of precipitation, and subsequent riverine freshwater discharge and sediment fluxes to the ocean. With a guide of several in situ observed data, we carried out a quantitative assessment of the accumulation and erosion of the sediments and resultant suspended radiocesium distribution around the river mouth and nearshore areas along the Fukushima Coast.
2019年09月18日, AIP Conference Proceedings, 2157[査読有り]
研究論文（国際会議プロシーディングス）
© 2019, © 2019 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. Oceanic regional downscaling capability was implemented into Short-Term Emergency Assessment system of Marine Environmental Radioactivity (STEAMER) developed by Japan Atomic Energy Agency to enable us to predict more realistically the oceanic dispersion of radionuclides at higher spatiotemporal resolutions for broader applications. The system consisted of a double-nested oceanic downscaling circulation model with tidal forcing and an oceanic radionuclide dispersion model. This system was used to comparatively examine downscaling and tidal effects on the dispersion of radionuclides hypothetically released from the Fukushima Daiichi Nuclear Power Plant in the colder season. The simulated dissolved 137Cs distribution was different from that obtained using coarser-resolution models because downscaling enhanced both horizontal and vertical mixing. The suppression of horizontal mixing and the promotion of vertical mixing by tidal forcing synergistically reduced offshore 137Cs transport. In addition, the submesoscale effects strengthened the three-dimensional 137Cs fluctuations by <10 times, while the tidal effects promoted slightly increased the intensity of three-dimensional 137Cs fluctuations by approximately 3%. This indicated that the submesoscale effects substantially surpassed tidal forcing in oceanic mixing in the coastal margin off Fukushima in the colder season.
2019年08月03日, Journal of Nuclear Science and Technology, 56 (8), 752 - 763[査読有り]
研究論文（学術雑誌）
© 2019 Elsevier Ltd An Eulerian passive tracer model coupled with a quadruple-nested 3D circulation model was used to assess the coastal dispersal of treated wastewater effluent from a sewage treatment plant and the associated impacts on an adjacent seaweed farm using three different operational scenarios. When the discharged volume and source effluent fluxes were decreased by ~16.7%, the accumulated effluent in the farm was reduced by ~25.4%. A tracer flux budget analysis revealed the apparent predominance of the transient component that accounts for the nonlinear interactions primarily from tidal currents and eddies. The transient flux promoted the effluent influx to impede effluent accumulation in the farm, whereas the mean flux contributed to the outgoing flux. A source flux reduction caused a remarkable decrease in the transient flux and thus an even greater effluent accumulation reduction. In turn, a modified source density scenario without total effluent volume change did not work as expected.
2019年07月, Marine Pollution Bulletin, 144, 265 - 274[査読有り]
研究論文（学術雑誌）
© 2019 Elsevier Ltd All rights reserved. Surface gravity waves are most familiar form of wave motions occurring at the interface between the atmosphere and water, which we see on ponds, lakes, and oceans. They are mainly wind driven, restored by gravity, and oscillating at a period of O(1-10) s. Shorter waves are also affected by surface tension, called capillary waves. In this article, linear and weakly nonlinear dynamics of surface gravity and capillary waves are described in the context of inviscid, incompressive, and irrotational fluids. Wave-current interactions, resonant wave-wave interactions, parasitic capillary waves, and wave breaking are also outlined.
2019年01月01日, Encyclopedia of Ocean Sciences, 672 - 681[査読有り]
論文集(書籍)内論文
- Japan Society of Civil Engineers, 2019年, 土木学会論文集B2(海岸工学), 75 (2), I_667 - I_672
[査読有り]
研究論文（学術雑誌）
- Japan Society of Civil Engineers, 2019年, 土木学会論文集B2(海岸工学), 75 (2), I_979 - I_984
[査読有り]
研究論文（学術雑誌）
- Japan Society of Civil Engineers, 2019年, 土木学会論文集B2(海岸工学), 75 (2), I_211 - I_216
[査読有り]
研究論文（学術雑誌）
- Japan Society of Civil Engineers, 2019年, 土木学会論文集B2(海岸工学), 75 (2), I_199 - I_204
[査読有り]
研究論文（学術雑誌）
- 土木学会, 2019年, 地球環境研究論文集 : 地球環境シンポジウム, 27, 41 - 46, 日本語ディスドロメータを用いた海上における2013年夏季の降雨観測
[査読有り]
©2018. American Geophysical Union. All Rights Reserved. A numerical wave model is applied to study the wind-generated wave in the Southern California Bight (SCB). Observational data available in this area are used to validate the numerical model results. The model is integrated for 10 years (2004–2013). The comparison of the model results with observations shows that the model well reproduces the wave variations in the SCB. The multiple-scale variations in the wavefield are examined: interannual, seasonal, intraseasonal, and diurnal. The significant wave height and swell wave height distributions display distinct patterns during different seasons. On the interannual scale, the wave variation in the SCB is influenced by El Niño–Southern Oscillation activities. Intraseasonal scale events occur frequently. Land/sea breezes cause the diurnal variation. The effects of topography (especially islands) and currents on waves are analyzed. The islands in the SCB provide significant sheltering effects to the coast from deep-ocean waves. The effect of background currents on waves is discussed.
2018年12月, Journal of Geophysical Research: Oceans, 123 (12), 9340 - 9356, 英語[査読有り]
研究論文（学術雑誌）
©2018. American Geophysical Union. All Rights Reserved. For the preservation and protection of coral habitats along the Nansei Archipelago in the East China Sea, a submesoscale eddy-resolving synoptic ocean model was developed based on the Regional Oceanic Modeling System coupled with a 3-D Lagrangian particle tracking model. Millions of neutrally buoyant particles representing coral spawn and larvae were released from 19 major islands and one lagoon every spring from 2012 to 2015. The model results were compared to satellite data, in situ observation, and surface drifters to confirm reasonable agreement. The connectivity matrix across the archipelago was quantified using Lagrangian probability density functions of the modeled particle displacement. Most particles remained near the release areas, while some traveled long distances by the northeastward drifting Kuroshio, leading to notable interisland coral transport across the archipelago that promotes interisland connectivity. A possible mechanism was examined by analyzing the transition from coastal to pelagic transport of the particles released from the Yaeyama Islands, the southernmost area of the archipelago. The Kuroshio trapped the particles released from the northern coast of the islands with considerable temporal variability in the entrainment rate. By contrast, particles released from the southern coast are markedly affected by the eastward current around the release sites, which significantly reduces their entrainment in the Kuroshio and, thus, long-distance transport. Some entrained particles were expelled abruptly from the Kuroshio, trapped by the southwestward drifting Kuroshio Counter Current developed between the Kuroshio and the archipelago, and subsequently transported eastward to the islands.
2018年12月, Journal of Geophysical Research: Oceans, 123 (12), 9245 - 9265, 英語[査読有り]
研究論文（学術雑誌）
- 2018年11月, 土木学会論文集B2（海岸工学）, 74 (2), I_667─I_672, 日本語
[査読有り]
研究論文（学術雑誌）
- 2018年11月, 土木学会論文集B2（海岸工学）, 74 (2), I_1291─I_1296, 日本語
[査読有り]
研究論文（学術雑誌）
- 2018年11月, 土木学会論文集B2（海岸工学）, 74 (2), I_67─I_72, 日本語
[査読有り]
研究論文（学術雑誌）
- 2018年11月, 土木学会論文集B2（海岸工学）, 74 (2), I_625─I_630, 日本語
[査読有り]
研究論文（学術雑誌）
© 2018 Cambridge University PressÂ. Coherent vortices with horizontal swirl arise spontaneously in the wave-driven nearshore surf zone. Here, a demonstration is made of the much greater robustness of coherent barotropic dipole vortices on a sloping beach in a 2D shallow-water model compared with fully 3D models either without or with stable density stratification. The explanation is that active vortex tilting and stretching or instability in 3D disrupt an initially barotropic dipole vortex. Without stratification in 3D, the vorticity retains a dipole envelope structure but is internally fragmented. With stratification in 3D, the disrupted vortex reforms as a coherent but weaker surface-intensified baroclinic dipole vortex. An implication is that barotropic or depth-integrated dynamical models of the wave-driven surf zone misrepresent an important aspect of surf-eddy behaviour.
2018年09月10日, Journal of Fluid Mechanics, 850 (R2), R21 - R212, 英語[査読有り]
研究論文（学術雑誌）
- 2018年09月, Proc. 13th International Conference on Hydrodynamics (ICHD2018), 358–363, 英語Development of a coupled HYCOM-ROMS downscaling ocean modeling system and its application to the South China Sea
[査読有り]
研究論文（国際会議プロシーディングス）
- 2018年09月, Proc. 13th International Conference on Hydrodynamics (ICHD2018), 182–188, 英語A Lagrangian analysis on coastal dispersal of larvae and spawn around Okinawa Island, Japan
[査読有り]
研究論文（国際会議プロシーディングス）
© 2017, © 2017 Taylor & Francis. For dynamically consistent, high-resolution, yet cost-effective regional oceanic downscaling modelling, an empirical three-dimensional (3D) density estimate based on publicly available datasets is utilized for the Regional Oceanic Modeling System (ROMS) with simple data assimilation (i.e., TS nudging, where TS stands for temperature and salinity). We rely on a method built upon the two-layer model to reconstruct a mesoscale 3D temperature and salinity field, referred to as Tokyo University of Marine Science and Technology (TUMSAT)-TS, using near real-time altimeter-derived dynamic height along with Argo float profiling data. The TUMSAT-TS is first validated using in situ hydrographic data, then is implemented in the Japan Coastal Ocean Predictability Experiment (JCOPE2)-ROMS downscaling system for the Kuroshio region off Japan. We explore the usability of TUMSAT-TS by carrying out three comparative simulations with temperature and salinity nudging towards the (i) TUMSAT-TS and (ii) JCOPE2-TS fields, and (iii) without the nudging. Whereas the unassimilated case fails to properly account for the Kuroshio, both datasets individually are found to help reproduce the mesoscale variability of the Kuroshio, as well as its transient paths, volume transport, associated kinetic energy (KE) and eddy KE, and seasonally varying stratification.
2018年08月08日, Atmosphere - Ocean, 56 (4), 212 - 229, 英語[査読有り]
研究論文（学術雑誌）
© 2018 Elsevier Ltd A high-resolution 3-D model was developed to assess the impact of a diversion outfall at the Tarumi Sewage Treatment Plant (TSTP) on an adjacent seaweed farm in Osaka Bay, Japan. The model was extensively validated to ensure a reasonable agreement with in situ observations. The western part of the farm is largely influenced by tidal currents, whereas the eastern area is mainly affected by subtidal residual currents that are primarily due to surface wind stress. The released effluent is transported by counterclockwise residual circulation formed off the TSTP. The model reveals that the diversion adequately suppresses the influence on the farm. While the instantaneous effluent concentration is diminished by about 50%, the effluent accumulated on the farm decreased from 2.83 × 104 m3 to 2.01 × 104 m3 due to the diversion, demonstrating an approximately 28% reduction of the effluent from the TSTP by the diversion outfall.
2018年05月, Marine Pollution Bulletin, 130, 40 - 54, 英語[査読有り]
研究論文（学術雑誌）
© 2018. American Geophysical Union. All Rights Reserved. This study developed a submesoscale eddy-resolving oceanic dispersal modeling system comprising a double-nested oceanic downscaling model and an offline oceanic radionuclide dispersion model. This was used to investigate the influences of submesoscale coherent structures (SCSs) and associated ageostrophic secondary circulations (ASCs) on the three-dimensional (3-D) dispersal of dissolved cesium-137 (137Cs) released from the Fukushima Daiichi Nuclear Power Plant (FNPP1). Extensive model-data comparison demonstrated that the innermost high-resolution model, with a lateral grid resolution of 1 km, could successfully reproduce transient mesoscale oceanic structures, the Kuroshio path and stratification, and spatiotemporal variations of 137Cs concentrations. Using an accompanying mesoscale eddy-resolving model (grid resolution: 10 km) as a guide, we showed that submesoscale dynamics are important for improved representation of both the eddy field and the resultant 3-D dispersal of 137Cs, with the temporal variability of surface 137Cs near the FNPP1 being equivalent to that in the coarse-resolution model. According to energy conversion and spectral analyses, SCSs and ASCs occur most intensively on the submesoscale, primarily because of shear instability. However, baroclinic instability serves as a secondary mechanism. SCSs have prominent seasonality, reflected by intensification in the colder months, which is when the FNPP1 accident occurred. Analysis of the vertical flux of 137Cs was performed by decomposition of the variables into eddy, mesoscale, and submesoscale components using frequency and wave number filters. It revealed that 42.7% of the FNPP1-derived 137Cs was transported downward below the mixed layer by eddies with the major contribution being from ASCs induced by submesoscale eddies.
2018年04月, Journal of Geophysical Research: Oceans, 123 (4), 2808 - 2828, 英語[査読有り]
研究論文（学術雑誌）
©2018. American Geophysical Union. All Rights Reserved. This study investigates the dynamics of tidally induced internal waves over a shallow ridge, the Izu-Ogasawara Ridge off the Japanese mainland, using a downscaled high-resolution regional ocean numerical model. Both the Kuroshio and tides contribute to the field of currents in the study area. The model results show strong internal tidal energy fluxes over the ridge, exceeding 3.5 kW m−1, which are higher than the fluxes along the Japanese mainland. The flux in the upstream side of the Kuroshio is enhanced by an interaction of internal waves and currents. The tidal forcing induces 92% of the total internal wave energy flux, exhibiting the considerable dominance of tides in internal waves. The tidal forcing enhances the kinetic energy, particularly in the northern area of the ridge where the Kuroshio Current is not a direct influence. The tidal forcing contributes to roughly 30% of the total kinetic energy in the study area.
2018年04月, Geophysical Research Letters, 45 (8), 3550 - 3558, 英語[査読有り]
研究論文（学術雑誌）
© 2017 Elsevier Ltd High-resolution downscaling ocean modeling was conducted to investigate the impacts of two super typhoons on the Kuroshio in the fall of 2014 off the Kyushu and Shikoku Islands, Japan. The model result was compared with field observations and satellite altimetry. The synoptic and mesoscale oceanic structures around the Kuroshio exhibit a good reproducibility. The typhoons generated near-inertial oscillations (NIOs) and near-inertial internal waves (NIIWs) around the Kuroshio path, particularly on the right side of the typhoon tracks. The NIOs developed in the mixed layer to alter the direction of the Kuroshio by ~30°. The associated velocity off the Shikoku and Kyushu Islands was significantly decelerated by ~0.2 ms−1. The velocity almost vanished off Kyushu Island and thus induced an unstable fluctuating path shortly after both typhoons passed over that region. The NIIWs were also excited at the thermocline, resulting in the oscillation of the Kuroshio path occurred in the entire water column. In contrast, off Shikoku Island, the typhoons shifted the Kuroshio path northward to enhance the interactions with the topographies. This shift caused considerable eddy shedding from the capes that resulted in mesoscale counterclockwise circulations as cyclonic quasi-standing eddies with a shedding period of ~3 days in the north of the Kuroshio path. The magnitude, direction, and meridional location of the path of the Kuroshio prominently fluctuated with the propagation of these eddies, manifested off Shikoku Island. Furthermore, these eddies induced sporadic northward intrusions of the Kuroshio warm water through the Kii Channel into the Seto Inland Sea (SIS), where a weak but persisting southward outflow prevails under normal conditions. Therefore, the process could collectively be called the “typhoon-Kuroshio-eddy interaction” which conceptually differs from the “typhoon-eddy-Kuroshio interaction” in the previous studies, where the Kuroshio was modulated by eddy collision. The wind stress curl and intrusions associated with the typhoons jointly provoked the inversion of the counterclockwise SIS residual circulation. The resultant spatially averaged volume flux was ~8 times as high as that under normal conditions.
2018年02月, Deep-Sea Research Part I: Oceanographic Research Papers, 132, 80 - 93, 英語[査読有り]
研究論文（学術雑誌）
瀬戸内海など閉鎖性海域の流動シミュレーションでは，陸域，とくに中小河川からの淡水流入量を如何に与えるかが常に問題となる．本研究では，瀬戸内海流域圏全体を対象とした陸域降水流出－海域流動モデルを構築し，2007～2015年の再現シミュレーションを通じて，一級水系・中小河川からの淡水流入量を明らかにするとともに，中小河川が海域流動シミュレーションの再現性に及ぼす影響を評価した．その結果，上記期間の陸域から瀬戸内海への年間淡水流入量は平均53.0km3/yr，その内訳は一級水系が68％，中小河川が32％と算定された．また，一級水系のみの河川流量を与えた海域流動シミュレーションは全体的に表層塩分を過大評価するが，全水系で与えた場合はその誤差が大きく軽減されることが確認された．
土木学会, 2018年, 土木学会論文集Ｂ２（海岸工学）, 74 (2), I_1135 - I_1140, 日本語[査読有り]
研究論文（学術雑誌）
© 2017 American Meteorological Society. Discovery and analysis of submesoscale variability O(0.3-30) km on the continental shelf is made possible by a high-resolution (Δx = 75 m) Regional Oceanic Modeling System (ROMS) simulation of the Southern California Bight (SCB). This variability is manifest in ubiquitous yet ephemeral coherent structures: fronts, filaments, and vortices. Similar to their open-ocean counterparts, fronts and filaments on the shelf are identified by their strong vertical velocity, surface convergence, cyclonic vorticity, and horizontal density gradient. Life cycles of these features typically last 3-5 days, with the formation dominated by a horizontal advective tendency that increases density and velocity gradients (i.e., frontogenesis). The shape of the coastline and depth of the water column both influence the abundance and spatial orientation of shallow-water fronts and filaments. Closer to shore, fronts and filaments often align themselves parallel to isobaths, and headlands often act as sites of intense vorticity generation through bottom stress. A quasi-steady, approximate momentum balance among rotation, pressure gradient, and vertical mixing-known as turbulent thermal wind (TTW)-often is valid in the strong secondary circulations local to fronts and filaments. However, front and filament circulations subject to strong diurnal variation in surface heating and vertical mixing are inconsistent with steady-state TTW balance. The secondary circulations can induce ephemeral material trapping and substantial vertical heat fluxes on the shelf.
AMER METEOROLOGICAL SOC, 2017年12月01日, Journal of Physical Oceanography, 47 (12), 2949 - 2976, 英語[査読有り]
研究論文（学術雑誌）
- 2017年11月, 土木学会論文集B2（海岸工学）, 73 (2), I_1315 - I_1320, 日本語
[査読有り]
研究論文（学術雑誌）
- 2017年11月, 土木学会論文集B2（海岸工学）, 73 (2), I_685 - I_690, 日本語
[査読有り]
研究論文（学術雑誌）
- 2017年11月, 土木学会論文集B2（海岸工学）, 73 (2), I_457 - I_462, 日本語
[査読有り]
研究論文（学術雑誌）
- 2017年11月, 土木学会論文集B2（海岸工学）, 73 (2), I_451 - I_456, 日本語
[査読有り]
研究論文（学術雑誌）
- 2017年11月, 土木学会論文集B2（海岸工学）, 73 (2), I_1429 - I_1437, 日本語
[査読有り]
研究論文（学術雑誌）
- 2017年11月, Atmosphere-Ocean, 55, 1 - 18, 英語
[査読有り]
研究論文（学術雑誌）
- 2017年11月, 土木学会論文集B2（海岸工学）, 73 (2), I_1663 - I_1668, 日本語
[査読有り]
研究論文（学術雑誌）
In this study, an oceanic downscaling model in a double-nested configuration was used to investigate the role played by the Kuroshio warm current in preserving and maintaining biological diversity in the coral coasts around the Ryukyu Islands (Japan). A comparison of the modeled data demonstrated that the innermost submesoscale eddy-resolving model successfully reproduced the synoptic and mesoscale oceanic structures even without data assimilation. The Kuroshio flows on the shelf break of the East China Sea approximately 150-200 km from the islands; therefore, eddy-induced transient processes are essential to the lateral transport of material within the strip between the Kuroshio and the islands. The model indicated an evident predominance of submesoscale anticyclonic eddies over cyclonic eddies near the surface of this strip. An energy conversion analysis relevant to the eddy-generation mechanisms revealed that a combination of both the shear instability due to the Kuroshio and the topography and baroclinic instability around the Kuroshio front jointly provoke these near-surface anticyclonic eddies, as well as the subsurface cyclonic eddies that are shed around the shelf break. Both surface and subsurface eddies fit within the submesoscale, and they are energized more as the grid resolution of the model is increased. An eddy heat flux (EHF) analysis was performed with decomposition into the divergent (dEHF) and rotational (rEHF) components. The rEHF vectors appeared along the temperature variance contours by following the Kuroshio, whereas the dEHF properly measured the transverse transport normal to the Kuroshio's path. The diagnostic EHF analysis demonstrated that an asymmetric dEHF occurs within the surface mixed layer, which promotes eastward transport toward the islands. Conversely, below the mixed layer, a negative dEHF tongue is formed that promotes the subsurface westward warm water transport.
PERGAMON-ELSEVIER SCIENCE LTD, 2017年07月, CONTINENTAL SHELF RESEARCH, 143, 206 - 218, 英語[査読有り]
研究論文（学術雑誌）
The ROMS-WEC model [Uchiyama et al., 2010] based on an Eulerian wave-averaged vortex-force asymptotic theory of McWilliams et al. (2004) is applied to analyze 3-D transient wave-driven rip currents and associated intrinsic very low-frequency (VLF) variability in the surf zone on a surveyed bathymetry under spatiotemporally uniform offshore incident waves. The 3-D rip currents are substantially depth-dependent due to the vertical recirculation, composed of pairs of counter-rotating longitudinal overturning roll cells that promote surface convergence. The vortex force plays an important role in vorticity budget, preconditioning overall vorticity reduction. These rip currents are intrinsically unstable and contribute about 70% to kinetic energy (KE) as eddy kinetic energy (EKE), consistent with observations. The dominant fluctuation period fits the VLF band, at about 18 min. The current effect on waves (CEW) alters not only the mean rip structure, but also the associated turbulence as the modified cross-shore EKE profile with considerable accentuation in the inner surf zone. Increased alongshore bathymetric variability proportionally intensifies KE and intrinsic EKE, whereas it reduces the VLF period. With a guide of a pseudo 2D model, we reveal that vortex tilting effect due to the horizontal vorticity inherent in the 3-D rip currents promotes collapse of the 3-D eddies through an enhanced forward kinetic energy cascade, leading to short-lived, laterally-stretched 3-D eddies resulting in elongated filaments that decay more quickly than coherent, long-lived, circular 2-D eddies.
AMER GEOPHYSICAL UNION, 2017年07月, JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 122 (7), 5826 - 5849, 英語[査読有り]
研究論文（学術雑誌）
In this study, an oceanic downscaling model in a double-nested configuration was used to investigate the role played by the Kuroshio warm current in preserving and maintaining biological diversity in the coral coasts around the Ryukyu Islands (Japan). A comparison of the modeled data demonstrated that the innermost submesoscale eddy-resolving model successfully reproduced the synoptic and mesoscale oceanic structures even without data assimilation. The Kuroshio flows on the shelf break of the East China Sea approximately 150-200 km from the islands; therefore, eddy-induced transient processes are essential to the lateral transport of material within the strip between the Kuroshio and the islands. The model indicated an evident predominance of submesoscale anticyclonic eddies over cyclonic eddies near the surface of this strip. An energy conversion analysis relevant to the eddy-generation mechanisms revealed that a combination of both the shear instability due to the Kuroshio and the topography and baroclinic instability around the Kuroshio front jointly provoke these near-surface anticyclonic eddies, as well as the subsurface cyclonic eddies that are shed around the shelf break. Both surface and subsurface eddies fit within the submesoscale, and they are energized more as the grid resolution of the model is increased. An eddy heat flux (EHF) analysis was performed with decomposition into the divergent (dEHF) and rotational (rEHF) components. The rEHF vectors appeared along the temperature variance contours by following the Kuroshio, whereas the dEHF properly measured the transverse transport normal to the Kuroshio's path. The diagnostic EHF analysis demonstrated that an asymmetric dEHF occurs within the surface mixed layer, which promotes eastward transport toward the islands. Conversely, below the mixed layer, a negative dEHF tongue is formed that promotes the subsurface westward warm water transport.
PERGAMON-ELSEVIER SCIENCE LTD, 2017年07月, CONTINENTAL SHELF RESEARCH, 143, 206 - 218, 英語[査読有り]
研究論文（学術雑誌）
The Kuroshio is one of the most energetic western boundary currents accompanied by vigorous eddy activity both on mesoscale and submesoscale, which affects biogeochemical processes in the upper ocean. We examine the primary production around the Kuroshio off Japan using a climatological ocean modeling based on the Regional Oceanic Modeling System (ROMS) coupled with a nitrogen-based nutrient, phytoplankton and zooplankton, and detritus (NPZD) biogeochemical model in a submesoscale eddy-permitting configuration. The model indicates significant differences of the biogeochemical responses to eddy activities in the Kuroshio Region (KR) and Kuroshio Extension Region (KE). In the KR, persisting cyclonic eddies developed between the Kuroshio and coastline are responsible for upwelling-induced eutrophication. However, the eddy-induced vertical nutrient flux counteracts and promotes pronounced southward and downward diapycnal nutrient transport from the mixed-layer down beneath the main body of the Kuroshio, which suppresses the near-surface productivity. In contrast, the KE has a 23.5% higher productivity than the KR, even at comparable eddy intensity. Upward nutrient transport prevails near the surface due to predominant cyclonic eddies, particularly to the north of the KE, where the downward transport barely occurs, except at depths deeper than 400 m and to a much smaller degree than in the KR. The eddy energy conversion analysis reveals that the combination of shear instability around the mainstream of the Kuroshio with prominent baroclinic instability near the Kuroshio front is essential for the generation of eddies in the KR, leading to the increase of the eddy-induced vertical nitrate transport around the Kuroshio.
AMER GEOPHYSICAL UNION, 2017年06月, JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 122 (6), 5046 - 5062, 英語[査読有り]
研究論文（学術雑誌）
- 2017年02月, 沿岸海洋研究, 54 (2), 151 - 157, 日本語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
[査読有り][招待有り]
研究論文（学術雑誌）
- 2017年02月, 沿岸海洋研究, 54 (2), 159 - 172, 日本語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
[査読有り][招待有り]
研究論文（学術雑誌）
- 2017年01月, 土木学会論文集B1（水工学）, 72 (4), I_949 - I_954, 日本語
[査読有り]
研究論文（学術雑誌）
金沢大学理工研究域環境デザイン学系半閉鎖性内湾である和歌山県田辺湾湾口部において，ADCP，塩分水温計などを用いた長期連続観測を行い，主に流動構造と海水交換特性に関する解析を行った．クロススペクトル解析結果から，流速鉛直構造と外力との対応については，表層付近の日周期変動には海上風が，成層期の混合層下部の半日周期変動には内部潮汐が，成層崩壊期の混合層全層では半日周期潮汐がそれぞれ寄与していることが分かった．一方，海水交換に対しては半日周期潮汐変動が最も寄与しているのに対し，それと同程度に周期約3日にピークを有するサブタイダル長周期成分の影響が大きかった．この長周期変動は紀伊水道スケールで生じる地形性のメソスケール渦の消長と密接に関係しており，モデルによる先行研究と整合的であった.出版者照会後に全文公開
土木学会 = Japan Society of Civil Engineers, 2016年11月15日, 土木学会論文集B4(海岸工学) = Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 72 (2), I_493 - I_498, 日本語[査読有り]
研究論文（学術雑誌）
- 2016年11月, 土木学会論文集B2（海岸工学）, 72 (2), I_1273 - I_1278, 日本語
[査読有り]
研究論文（学術雑誌）
- 2016年11月, 土木学会論文集B2（海岸工学）, 72 (2), I_757 - I_762, 日本語
[査読有り]
研究論文（学術雑誌）
- 2016年11月, 土木学会論文集B2（海岸工学）, 72 (2), I_457 - I_462, 日本語
[査読有り]
研究論文（学術雑誌）
- 2016年11月, 土木学会論文集B2（海岸工学）, 72 (2), I_481 - I_486, 日本語
[査読有り]
研究論文（学術雑誌）
- 2016年11月, 土木学会論文集B2（海岸工学）, 72 (2), I_1279 - I_1284, 日本語
[査読有り]
研究論文（学術雑誌）
- 2016年11月, 土木学会論文集B2（海岸工学）, 72 (2), I_1549 - I_1554, 日本語
[査読有り]
研究論文（学術雑誌）
- 2016年11月, 土木学会論文集B2（海岸工学）, 72 (2), I_1369 - I_1374, 日本語
[査読有り]
研究論文（学術雑誌）
- 2016年08月, AOGS 13th Annual Meeting (AOGS 2016)Upper ocean dynamics and associated water exchange at the entrance of a semi-enclosed bay based on an in-situ ADCP measurement
[査読有り]
Characterizing the dispersion and dilution of storm water from small coastal creeks is important for understanding the importance of land-derived subsidies to nearby ecosystems and the management of anthropogenic pollutants. In Southern California, creek runoff is episodic, intense, and short-lived while the plumes are buoyant, all of which make the field sampling of freshwater plumes challenging. Numerical modeling offers a viable way to characterize these systems. The dilution and dispersion of freshwater from two creeks that discharge into the Santa Barbara Channel, California is investigated using Regional Ocean Modeling System (ROMS) simulations with a horizontal resolution of 100 m. Tight coupling is found among precipitation, hydrologic discharge, wind forcing, and submesoscale flow structures which all contribute to plume evolution. During flooding, plumes are narrow and attached to the coast, due to downwelling/onshore wind forcing and intense vorticity filaments lying parallel to the shelf. As the storm passes, the winds typically shift to offshore/upwelling favorable conditions and the plume is advected offshore which enhances its dilution. Plumes reach the bottom nearshore while they form thin layers a few meters thick offshore. Dilution field of passive tracers released with the runoff is strongly anisotropic with stronger crossshelf gradients than along-shelf. Dispersion analysis of statistical moments of the passive tracer distribution results in scale-dependent diffusivities consistent with the particle-pair analysis of Romero et al. (2013). Model validation, the roles of submesoscale processes, and wind forcing on plume evolution and application to ecological issues and marine resource management are discussed.
AMER GEOPHYSICAL UNION, 2016年06月, JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 121 (6), 3926 - 3943, 英語[査読有り]
研究論文（学術雑誌）
Accurately representing diurnal and semidiurnal internal variability is necessary to investigate inner-shelf to midshelf exchange processes. Here, a coupled Regional Ocean Model System (ROMS)-Simulating Waves Nearshore (SWAN) model is compared to observed diurnal and semidiurnal internal tidal variability on the mid and inner shelf (26-8 m water depth) near San Pedro Bay, California. Modeled mean stratification is about one-half of that observed. Modeled and observed baroclinic velocity rotary spectra are similar in the diurnal and semidiurnal band. Modeled and observed temperature spectra have similar diurnal and semidiurnal band structure, although the modeled is weaker. The observed and modeled diurnal and semidiurnal baroclinic velocity- and temperature-dominant vertical structures are similar and consistent with mode-one internal motions. Both observed and modeled diurnal baroclinic kinetic energy are strongly correlated to diurnal wind forcing and enhanced by subtidal vorticity-induced reduction in the inertial frequency. The mid- and inner-shelf modeled diurnal depth-integrated heat budget is a balance between advective heat flux divergence and temperature time derivative. Temperature-velocity phase indicates progressive semidiurnal internal tide on the midshelf and largely standing internal tide on the inner shelf in both observed and modeled. The ratio of observed to modeled inferred phase speed is consistent with the observed to modeled stratification. The San Pedro Bay modeled semidiurnal internal tide has significant spatial variability, variable incident wave angles, and multiple local generation sites. Overall, the coupled ROMS-SWAN model represents well the complex diurnal and semidiurnal internal variability from the mid to the inner shelf.
AMER METEOROLOGICAL SOC, 2016年03月, JOURNAL OF PHYSICAL OCEANOGRAPHY, 46 (3), 841 - 862, 英語[査読有り]
研究論文（学術雑誌）
海から発生する波飛沫は大気-海洋間の熱，湿度，運動量の輸送量を決定すると共に，海塩粒子となって大気エアロゾルを構成することから，海上気象場に影響を与える重要なファクターの一つとなっている一方，その発生量は様々な要因に影響を受けることから精度良い見積もりが困難である．本研究では波飛沫発生量と気象，海象条件との関係を明らかにすることを最終的な目的とし，和歌山県田辺湾上において大気エアロゾルの粒子数密度の海上現地観測を行った．測定対象の三粒径(0.3, 1.0, 5.0 μm)のうち最も小さい粒子の数密度は観測期間を通して100 km以上のスケールの大気環境に支配され，平常時は波飛沫由来の海塩粒子の影響を多く含まないことが分かった．しかし太平洋側からの強風が卓越する気象イベント時においては何れの粒径の観測結果でも風速に対する単調増加傾向を示すことが確認された．この傾向は白波砕波が発生し始めると言われる海上風速6 ms-1以上の条件で表れ始めていることから，波飛沫由来の海洋性エアロゾル濃度の増加を観測した結果であると考える．
公益社団法人 土木学会, 2016年, 土木学会論文集A2（応用力学）, 72 (2), I_537 - I_547, 日本語[査読有り]
研究論文（学術雑誌）
- 京都大学防災研究所, 2016年, 京都大学防災研究所年報, 60 (60), 664 - 671, 日本語田辺中島高潮観測塔における2016年夏季観測結果
研究論文（大学，研究機関等紀要）
Do lateral shear instabilities of nearshore circulation account for a substantial part of Very Low-Frequency (VLF) variability? If yes, it would promote stirring and mixing of coastal waters and surf-shelf exchanges. Another question is whether tridimensional transient processes are important for instability generation. An innovative modeling system with tridimensional wave-current interactions was designed to investigate transient nearshore currents and interactions between nearshore and innershelf circulations. We present here some validation of rip current modeling for the Aquitanian coast of France, using in-situ and remote video sensing. We then proceed to show the benefits of 3D versus 2D (depth-mean flow) modeling of rip currents and their low-frequency variability. It appears that a large part of VLF motions is due to intrinsic variability of the tridimensional flow. 3D models may thus provide a valuable, only marginally more expensive alternative to conventional 2D approaches that miss the vertical flow structure and its nonlinear interaction with the depth-averaged flow. (C) 2015 Published by Elsevier Ltd.
ELSEVIER SCI LTD, 2015年12月, OCEAN MODELLING, 96, 36 - 48, 英語[査読有り]
研究論文（学術雑誌）
- 土木学会, 2015年11月, 土木学会論文集B2（海岸工学）, 71 (2), 1219 - 1224, 日本語
[査読有り]
研究論文（学術雑誌）
- 土木学会, 2015年11月, 土木学会論文集B2（海岸工学）, 71 (2), 415 - 420, 日本語
[査読有り]
研究論文（学術雑誌）
- 土木学会, 2015年11月, 土木学会論文集B2（海岸工学）, 71 (2), 565 - 570, 日本語
[査読有り]
研究論文（学術雑誌）
- 土木学会, 2015年11月, 土木学会論文集B2（海岸工学）, 71 (2), 211 - 216, 日本語
[査読有り]
研究論文（学術雑誌）
- 土木学会, 2015年11月, 土木学会論文集B2（海岸工学）, 71 (2), 1231 - 1236, 日本語
[査読有り]
研究論文（学術雑誌）
- JSST, 2015年10月, Proc. of 34th JSST Annual Conference: International Conference on Simulation Technology, 318 - 320, 英語Three-dimensional transient rip currents: Effects of topography on low-frequency motions
[査読有り]
研究論文（国際会議プロシーディングス）
- JSST, 2015年10月, Proc. of 34th JSST Annual Conference: International Conference on Simulation Technology, 314 - 317, 英語Seasonal variability of Eulerian tracer dispersal in an estuary and a continental shelf margin
[査読有り]
研究論文（国際会議プロシーディングス）
- JSST, 2015年10月, Proc. of 34th JSST Annual Conference: International Conference on Simulation Technology, 310 - 313, 英語Larval dispersal in the Seto Inland Sea analyzed with a 3-D Lagrangian particle tracking
[査読有り]
研究論文（国際会議プロシーディングス）
- 土木学会, 2015年06月, 土木学会論文集B3（海洋開発）, 71 (2), 383 - 388, 日本語
[査読有り]
研究論文（学術雑誌）
- 土木学会, 2015年06月, 土木学会論文集B1（水工学）, 72 (4), I_949 - I_954, 日本語
[査読有り]
研究論文（学術雑誌）
- 土木学会, 2015年06月, 土木学会論文集B3（海洋開発）, 71 (2), 365 - 370, 日本語
[査読有り]
研究論文（学術雑誌）
A coupled wave and circulation model that includes tide, wind, buoyancy, and wave processes is necessary to investigate tracer exchange in the shelf region. Here, a coupled Regional Ocean Model System (ROMS)-Simulating Waves Nearshore (SWAN) model, resolving midshelf to the surfzone region of the San Pedro Bay, California, is compared to observations from the 2006 Huntington Beach experiment. Waves are well modeled, and surfzone cross- and alongshore velocities are reasonably well modeled. Modeled and observed rotary velocity spectra compare well in subtidal and tidal bands, and temperature spectra compare well in the subtidal band. Observed and modeled mid- and inner-shelf subtidal velocity ellipses and temperature variability determined from the first vertical complex EOF (cEOF) mode have similar vertical structure. Although the modeled subtidal velocity vertical shear and stratification are weaker than observed, the ratio of stratification to shear is similar, suggesting model vertical mixing is consistent with observations. On fortnightly and longer time scales, the surface heat flux and advective heat flux divergence largely balance on the inner shelf and surfzone. The surfzone and inner-shelf alongshore currents separated by 220 m are unrelated. Both modeled and observed subtidal alongshelf current and temperature are cross-shelf coherent seaward of the surfzone. Wind forcing explains 50% of the observed and modeled inner-shelf alongshore current variability. The observed and modeled inner-shelf alongshelf nonuniformities in depth-averaged alongshore velocities are similar. Inferred, inner-shelf, wave-induced, cross-shore exchange is more important than on the U.S. East Coast. Overall, the coupled ROMS-SWAN model represents well the waves and subtidal circulation dynamics from the midshelf to the surfzone.
AMER METEOROLOGICAL SOC, 2015年06月, JOURNAL OF PHYSICAL OCEANOGRAPHY, 45 (6), 1464 - 1490, 英語[査読有り]
研究論文（学術雑誌）
- 田辺中島高潮観測塔における2015年夏季観測結果
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年, 京都大学防災研究所年報, 59 (59), 431 - 437, 日本語研究論文（大学，研究機関等紀要）
- 2014年11月, 土木学会論文集B2（海岸工学）, 70 (2), 571 - 575, 日本語
[査読有り]
研究論文（学術雑誌）
- 2014年11月, 土木学会論文集B2（海岸工学）, 70 (2), 451 - 455, 日本語
[査読有り]
研究論文（学術雑誌）
- 2014年11月, 土木学会論文集B2（海岸工学）, 70 (2), 1286 - 1290, 日本語
[査読有り]
研究論文（学術雑誌）
- 2014年11月, 土木学会論文集B2（海岸工学）, 70 (2), 446 - 450, 日本語
[査読有り]
研究論文（学術雑誌）
- 2014年11月, 土木学会論文集B2（海岸工学）, 70 (2), 71 - 75, 日本語
[査読有り]
研究論文（学術雑誌）
- 2014年11月, 土木学会論文集B2（海岸工学）, 70 (2), 1076 - 1080, 日本語
[査読有り]
研究論文（学術雑誌）
- IAHR, 2014年09月, Proc. 19th IAHR-APD Congress 2014, 7 pp., 英語On tridimensional rip current modeling
[査読有り]
研究論文（国際会議プロシーディングス）
- ISOPE, 2014年06月, Proc. 24th International Ocean and Polar Engineering Conference, 5 pp., 英語Effects of the submesoscale anticyclonic eddies induced by Kuroshio in East China Sea
[査読有り]
研究論文（国際会議プロシーディングス）
- ISOPE, 2014年06月, Proc. 24th International Ocean and Polar Engineering Conference, 4 pp., 英語Coastal dispersal of urban treated wastewater in semi-enclosed estuaries
[査読有り]
研究論文（国際会議プロシーディングス）
The dispersal and dilution of urban wastewater effluents from offshore, subsurface outfalls is simulated with a comprehensive circulation model with downscaling in nested grid configurations for San Pedro and Santa Monica Bays in Southern California during Fall of 2006. The circulation is comprised of mean persistent currents, mesoscale and submesoscale eddies, and tides. Effluent volume inflow rates at Huntington Beach and Hyperion are specified, and both their present outfall locations and alternative nearshore diversion sites are assessed. The effluent tracer concentration fields are highly intermittent mainly due to eddy currents, and their probability distribution functions have long tails of high concentration. The dilution rate is controlled by submesoscale stirring and straining in tracer filaments. The dominant dispersal pattern is alongshore in both directions, approximately along isobaths, over distances of more than 10 km before dilution takes over. The current outfall locations mostly keep the effluent below the surface and away from the shore, as intended, but the nearshore diversions do not. (C) 2014 Elsevier Ltd. All rights reserved.
PERGAMON-ELSEVIER SCIENCE LTD, 2014年03月, CONTINENTAL SHELF RESEARCH, 76, 36 - 52, 英語[査読有り]
研究論文（学術雑誌）
- 土木学会, 2014年03月, 土木学会論文集B1（水工学）／水工学論文集, 70 (4), 73 - 78, 英語
[査読有り]
研究論文（学術雑誌）
- 土木学会, 2014年01月, 土木学会論文集B2（海岸工学）, 70 (1), 1 - 14, 日本語波−流れ相互作用が海浜流系の力学構造に及ぼす影響について
[査読有り]
研究論文（学術雑誌）
- 公益社団法人 土木学会, 2014年, 土木学会論文集B2(海岸工学), 70 (2), I_476 - I_480, 日本語
[査読有り]
研究論文（学術雑誌）
- 田辺中島高潮観測塔における2014年夏季観測結果
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年, 京都大学防災研究所年報, (58), 315 - 320, 日本語研究論文（大学，研究機関等紀要）
- 2013年11月, 土木学会論文集B2（海岸工学）, 69 (2), 471 - 475, 日本語
[査読有り]
研究論文（学術雑誌）
- 2013年11月, 土木学会論文集B2（海岸工学）, 69 (2), 521 - 525, 日本語
[査読有り]
研究論文（学術雑誌）
- 2013年11月, 土木学会論文集B2（海岸工学）, 69 (2), 1051 - 1055, 日本語
[査読有り]
研究論文（学術雑誌）
- 2013年11月, 土木学会論文集B2（海岸工学）, 69 (2), 456 - 460, 日本語
[査読有り]
研究論文（学術雑誌）
- 2013年11月, 土木学会論文集B2（海岸工学）, 69 (2), 1056 - 1060, 日本語
[査読有り]
研究論文（学術雑誌）
- 2013年11月, 土木学会論文集B2（海岸工学）, 69 (2), 481 - 485, 日本語
[査読有り]
研究論文（学術雑誌）
- 2013年11月, 土木学会論文集B2（海岸工学）, 69 (2), 56 - 60, 日本語
[査読有り]
研究論文（学術雑誌）
Knowledge of horizontal relative dispersion in nearshore oceans is important for many applications including the transport and fate of pollutants and the dynamics of nearshore ecosystems. Two-particle dispersion statistics are calculated from millions of synthetic particle trajectories from high-resolution numerical simulations of the Southern California Bight. The model horizontal resolution of 250 m allows the investigation of the two-particle dispersion, with an initial pair separation of 500 m. The relative dispersion is characterized with respect to the coastal geometry, bathymetry, eddy kinetic energy, and the relative magnitudes of strain and vorticity. Dispersion is dominated by the submesoscale, not by tides. In general, headlands are more energetic and dispersive than bays. Relative diffusivity estimates are smaller and more anisotropic close to shore. Farther from shore, the relative diffusivity increases and becomes less anisotropic, approaching isotropy similar to 10 km from the coast. The degree of anisotropy of the relative diffusivity is qualitatively consistent with that for eddy kinetic energy. The total relative diffusivity as a function of pair separation distance R is on average proportional to R-5/4. Additional Lagrangian experiments at higher horizontal numerical resolution confirmed the robustness of these results. Structures of large vorticity are preferably elongated and aligned with the coastline nearshore, which may limit cross-shelf dispersion. The results provide useful information for the design of subgrid-scale mixing parameterizations as well as quantifying the transport and dispersal of dissolved pollutants and biological propagules.
AMER METEOROLOGICAL SOC, 2013年09月, JOURNAL OF PHYSICAL OCEANOGRAPHY, 43 (9), 1862 - 1879, 英語[査読有り]
研究論文（学術雑誌）
- 京都大学防災研究所, 2013年06月, 京都大学防災研究所年報, (56B), 441 - 447, 日本語田辺中島高潮観測塔における2012年夏季観測結果
研究論文（大学，研究機関等紀要）
- Wave-current interaction in formation of rip channel system
© APAC 2013.All rights reserved. Current effect on waves (CEW) is examined for formation of a rip channel system with a barotropic modeling framework based on Uchiyama et al. (2009). The model consists of an Eulerian phase-averaged shallow water equation with a vortex-force formalism, WKB ray equations for spectrum-peak waves, and a bed evolution equation with the Soulsby-Van Rijn's total sediment flux prescription. CEW acts on reducing the offshore extent of seaward rip currents through wave refraction on the currents, leading to modifying the budget of sediment flux and associated surf-zone topography. Inclusion of CEW results in shoaling rip channels, deepening offshore mounds, and elongating alongshore spacing of rip channels with normal incidence of offshore waves.
2013年, Proc. of 7th International Conference on Asian and Pacific Coasts (APAC 2013), 173 - 179, 英語[査読有り]
研究論文（国際会議プロシーディングス）
- Field Observations at an Offshore Observation Tower during the Typhoon Seasons
This paper shows some results of intensive field observations carried out in the summer seasons since 2009. The intensive field observations have been conducted at the observation tower of Shirahama Oceanographic Observatory (SOO), DPRI, Kyoto University. The observation tower of SOO is an offshore platform for the oceanographic and meteorological observation and it is located at the bay mouth of Tanabe bay, the southwestern part of Kii Penisula, Japan. One of the aims of the observations is field data measurements to comprehend the vertical mixing process due to wind and wind wave. During the observations, five typhoons (Melor in 2009, Ma-on, Talas and Roke in 2011 and Jelawat in 2012) hit the Kii peninsula. Three of them (Melor, Roke and Jelawat) passed along the southern coast of Japan and they have similar tracks around the Kii peninsula.. Only Talas in 2011 passed across the main island of Japan and reached the Sea of Japan. In the observations, the vertical profiles of currents and water temperature have been measured as well as wind and wave conditions. The main results are as follows: Wind and wave conditions have common characteristics like the temporal variation of wave period the incidence of high wave peak even though these conditions are affected by the typhoon tracks. The temporal variations of water temperature have also similar trends when the typhoons come close to the observation site, however, the vertical profiles of water temperature before and after the typhoon coming have big difference. The observed results underline the needs for the continuous observation activities and multidimensional data analysis combined with numerical simulations in order to investigate the mixing process under stormy conditions.
TSINGHUA UNIV, 2013年, PROCEEDINGS OF THE 35TH IAHR WORLD CONGRESS, VOLS III AND IV, 英語[査読有り]
研究論文（国際会議プロシーディングス）
- 田辺中島高潮観測塔における2013年夏季観測結果
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.
京都大学防災研究所, 2013年, 京都大学防災研究所年報, (57), 455 - 461, 日本語研究論文（大学，研究機関等紀要）
- 2012年11月, 土木学会論文集B2（海岸工学）, Vol.68 (2), I_36 - I_40, 日本語
[査読有り]
研究論文（学術雑誌）
- 2012年11月, 土木学会論文集B2（海岸工学）, Vol.68 (2), I_931 - I_935, 日本語
[査読有り]
研究論文（学術雑誌）
- 2012年11月, 土木学会論文集B2（海岸工学）, Vol.68 (2), I_441 - I_445, 日本語
[査読有り]
研究論文（学術雑誌）
- 2012年11月, 土木学会論文集B2（海岸工学）, Vol.68 (2), I_426 - I_430, 日本語
[査読有り]
研究論文（学術雑誌）
- 2012年11月, 土木学会論文集B2（海岸工学）, Vol.68 (2), I_436 - I_440, 日本語
[査読有り]
研究論文（学術雑誌）
The Regional Oceanic Modeling System (ROMS) is applied in a nested configuration with realistic forcing to the Southern California Bight (SCB) to analyze the variability in semidiurnal internal wave generation and propagation. The SCB has a complex topography with supercritical slopes that generate linear internal waves at the forcing frequency. The model predicts the observed barotropic and baroclinic tides reasonably well, although the observed baroclinic tides feature slightly larger amplitudes. The strongest semidiurnal barotropic to baroclinic energy conversion occurs on a steep sill slope of the 1900-m-deep Santa Cruz Basin. This causes a forced, near-resonant, semidiurnal Poincare wave that rotates clockwise in the basin and is of the first mode along the radial, azimuthal, and vertical directions. The associated tidal-mean, depth-integrated energy fluxes and isotherm oscillation amplitudes in the basin reach maximum values of about 5 kW m(-1) and 100 m and are strongly modulated by the spring-neap cycle. Most energy is locally dissipated, and only 10% escapes the basin. The baroclinic energy in the remaining basins is orders of magnitudes smaller. High-resolution coastal models are important in locating overlooked mixing hotspots such as the Santa Cruz Basin. These mixing hotspots may be important for ocean mixing and the overturning circulation.
AMER METEOROLOGICAL SOC, 2012年01月, JOURNAL OF PHYSICAL OCEANOGRAPHY, 42 (1), 62 - 77, 英語[査読有り]
研究論文（学術雑誌）
- 2012年, Journal of Geophysical Research - Oceans, 117 (C7), 7003 - 7003
[査読有り]
研究論文（学術雑誌）
- 2011年11月, 土木学会論文集B2（海岸工学）, Vol.67, No.2, 96-100., 日本語
[査読有り]
研究論文（学術雑誌）
We use the vortex force formalism to analyze the effect of rip currents on their own wave forcing. The vortex force formalism allows us to decompose the wave forcing into the nonconservative flux of momentum due to wave breaking and the conservative vortex force. Following Yu and Slinn (2003), we consider rip currents initially generated by alongshore variation of wave breaking due to a perturbation of a barred bottom topography. This variation is reduced in magnitude by two current effects on waves: wave ray bending and the flux of wave energy by currents. We compute the change in wave energy caused by these two effects on their own and use this to show that their relative magnitude scales with the square of the ratio of the length to width of the rip current. Both effects increase the wave height over the channels of the longshore bar, which leads to more wave breaking and counterbalances its longshore variation due to bottom refraction. In comparison to wave breaking, the change in the vortex force is negligible. Next, we show how the reduction in wave breaking is similar to an enhanced bottom friction. We then analyze the dependence of this relationship on the breaking parameterization, angle of incidence of the waves, and bottom drag law.
AMER GEOPHYSICAL UNION, 2011年05月, JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 116 (C5), 1 - 16, 英語[査読有り]
研究論文（学術雑誌）
A vortex-force formalism for the interaction of surface gravity waves and currents is implemented in a three-dimensional (3D), terrain-following, hydrostatic, oceanic circulation model (Regional Oceanic Modeling System: ROMS; Shchepetkin and McWilliams, 2005). Eulerian wave-averaged current equations for mass, momentum, and tracers are included in ROMS based on an asymptotic theory by McWilliams et al. (2004) plus non-conservative wave effects due to wave breaking, associated surface roller waves, bottom streaming, and wave-enhanced vertical mixing and bottom drag especially for coastal and nearshore applications. The currents are coupled with a spectrum-peak WKB wave-refraction model that includes the effect of currents on waves, or, alternatively, a spectrum-resolving wave model (e.g., SWAN) is used. The coupled system is applied to the nearshore surf zone during the DUCK94 field measurement campaign. Model results are compared to the observations and effects of parameter choices are investigated with emphasis on simulating and interpreting the vertical profiles for alongshore and cross-shore currents. The model is further compared to another ROMS-based 3D coupled model by Warner et al. (2008) with depth-dependent radiation stresses on a plane beach. In both tests the present model manifests an onshore surface flow and compensating offshore near-bed undertow near the shoreline and around the breaking point. In contrast, the radiation-stress prescription yields significantly weaker vertical shear. The currents' cross-shore and vertical structure is significantly shaped by the wave effects of near-surface breaker acceleration, vertical component of vortex force, and wave-enhanced pressure force and bottom drag. (C) 2010 Elsevier Ltd. All rights reserved.
ELSEVIER SCI LTD, 2010年, OCEAN MODELLING, 34 (1-2), 16 - 35, 英語[査読有り]
研究論文（学術雑誌）
A young cold core cyclonic eddy displaying a significant increase in surface chlorophyll was observed offshore Lanai Island, Hawai'i, where the Marine Optical Buoy (MOBY) is located. During one of its deployments, MOBY broke free from its mooring. In the course of its 3-day free drifting period, MOBY followed a cyclonic eddy, which is manifested by satellite remote sensing data, chlorophyll data from Moderate Resolution Imaging Spectroradiometer, and sea surface temperature (SST) from a Geostationary Operational Environmental Satellite. The time series of the SST show that the cold core eddy was in a formative stage. It existed as a stand-alone eddy for about 9 days before it merged with cold water south of Oahu Island. A high-resolution numerical model simulation reproduces similar eddies in terms of location, size, and intensity. An eddy detection algorithm is described and applied to locate and track the modeled eddies. The results demonstrate that mesoscale and submesoscale eddies are frequently generated on and pass through the lee side of Lanai Island and the statistical analysis quantifies the general features of eddies in the area.
AMER GEOPHYSICAL UNION, 2009年10月, JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 114 (C10), 10008, 英語[査読有り]
研究論文（学術雑誌）
We examine wave-current interactions in littoral current shear instabilities above a single-barred beach using a fully coupled wave and barotropic current model based on the multiscale asymptotic theory derived by McWilliams et al. (2004). This Eulerian wave-averaged model captures wave effects on currents (WEC) in a manner that leads to simple interpretations. The dynamically conservative WEC are the vortex force and material transport by Stokes drift and the sea level adjustment by wave set-down and setup. In the setting considered here there are also important current effects on the waves (CEW): induction of a Doppler shift by currents and surface elevation variation in the wave dispersion relation. Nonconservative effects, due to wave breaking and bottom drag, also play a prominent role in generating and equilibrating the mean alongshore current, consistent with prior studies. High bottom drag stabilizes the currents, while a drag reduction below a critical threshold value leads to shear instability with nearly periodic, alongshore-fluctuating eddies. An even smaller bottom drag yields irregular eddy motions with intermittent offshore eruption of vortex pairs from the meandering alongshore current. Several alternative parameterizations of the bottom drag are contrasted here. Including CEW in the model leads to a delay in the onset of the instability, a suppression of fluctuations in cross-shore velocity and lateral Reynolds stress, and an enhancement of the mean alongshore velocity. The WEC increase the Reynolds stress in the offshore region, and the conservative vortex force and mean advection are comparable in magnitude to the breaking acceleration and bottom drag. Conversely, the CEW reduce the Reynolds stress and attenuate the breaking acceleration through refractive focusing by current shear. Overall, the WEC enhance the instantaneous cross-shore momentum flux to induce more energetic eddy motions and retard the mean alongshore current, while the CEW stabilize the fluctuations and help maintain a strong mean current.
AMER GEOPHYSICAL UNION, 2009年06月, JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 114 (C6), 6021, 英語[査読有り]
研究論文（学術雑誌）
[1] Oceanic infragravity waves are investigated as a possible source of seismic free oscillations, often referred to as the `` hum'' of the Earth, using a numerical model of depth- independent, nondispersive, long- wave dynamics with a forcing from nonlinear interactions among the primary wind waves ( including swell). Because of near- resonant amplification, the structure of the primary- wave forcing field in shallow water, and an edge- trapping mechanism, infragravity waves are excited very effectively near the coasts. Deep- water infragravity waves are significantly influenced both by offshore leakage and propagation of the coastally generated free waves and by deep- water primary- wave forcing. With the inclusion of `` mesoscale'' variability on top of the more slowly varying primary waves generated in synoptic storms, the deep- water infragravity waves are found to have an amplitude on the order of a millimeter in height, which is consistent with field observations and considered to be sufficient to account for local hum excitation in the middle of the basin.
AMER GEOPHYSICAL UNION, 2008年07月, JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 113 (C7), 7029, 英語[査読有り]
研究論文（学術雑誌）
Hydrodynamics, sediment suspension, and morphological response on an estuarine intertidal sand flat in Tokyo Bay, Japan, are examined through a field experiment performed for 16 days in winter 2000 and using a bathymetry data set based on a 6-year series of surveys. Topography of the sandy flat was found to fluctuate by approximately 8 cm during the deployment, while the long-term accumulation rate is estimated with the surveyed bathymetries to be only 3.8 cm/y. Cross-spectral analysis of the measured data indicates that on the sandy tidal flat, semidiurnal or sho erter Period fluctuations in current velocity are mostly attributed to semidiurnal tides and waves, whereas wind above the generally drives diurnal or longer-period fluctuations. The field data also confirm that suspended sediment concentrations were highly correlated with bed shear stress, which is generated by combination of tidal current, wind-induced current, and wind waves. Episodic erosion is observed on the sandy flat with high turbidities on ebbing phases. Erosion evidently occurs at phases between the high slack and the mean tidal levels during ebb flows when combined tidal, wind-driven, and wave-driven currents are maximized.
COASTAL EDUCATION & RESEARCH FOUNDATION, 2007年07月, JOURNAL OF COASTAL RESEARCH, 23 (4), 1015 - 1027, 英語[査読有り]
研究論文（学術雑誌）
High temporal-resolution fluctuations in oxygen concentration and vertical velocity were measured over an intertidal sandflat (water depth < 69 cm) using an oxygen microelectrode and an acoustic Doppler velocimeter, in order to estimate oxygen flux across the sediment-water interface using the eddy-correlation method. The effect of flux estimate procedures, including noise removal and extraction of fluctuating components, was investigated. The estimated oxygen effluxes from the sediment ranged from -3.2 to 6.6 mmol O-2 m(-2) h(-1) in the light and from -14.5 to -6.6 mmol O-2 m(-2) h(-1) in the dark. The oxygen-uptake fluxes in the dark were markedly higher than those measured by a conventional enclosure technique. High-frequency turbulence and/or noise (> 5 Hz) observed in the vertical velocity and oxygen concentration data made little contribution to the total oxygen flux (0 to 7 %). However, trends (steady change over a longer time scale) caused significant artifacts in the estimated fluxes for several cases. Thus, removal of trends from raw time-series data is recommended. The co-spectrum of the fluctuating components of vertical velocity and oxygen concentration revealed that the oxygen flux at a frequency band between 0.3 and 1.4 Hz (at a period from 0.7 to 3.3 s) was a major contributor to the total oxygen flux. This frequency was consistent with the dominant frequency of vertical velocity, indicating that transport and exchange of porewater and overlying water by wind-induced waves may be crucial processes to dissolved oxygen flux between permeable sandy sediments and shallow waters.
INTER-RESEARCH, 2006年, MARINE ECOLOGY PROGRESS SERIES, 307, 59 - 68, 英語[査読有り]
研究論文（学術雑誌）
- 港湾空港技術研究所, 2005年, Report of Port and Airport Research Institute, 44 (1), 3 - 21, 英語Modeling three-dimensional cohesive sediment transport and associated morphological variation in estuarine intertidal mudflats
[査読有り]
研究論文（大学，研究機関等紀要）
- 土木学会, 2004年, 海岸工学論文集, 51 (1), 351 - 355, 日本語
[査読有り]
研究論文（学術雑誌）
- Taylor & Francis Group, London, UK, 2004年, Hydrodynamics VI - Theory and Application, (eds) L. Cheng and K. Yeow, 293 - 299, 英語Wetting and drying scheme for POM and its application to San Francisco Bay
[査読有り]
研究論文（国際会議プロシーディングス）
- 港湾空港技術研究所, 2004年, Report of Port and Airport Research Institute, 43 (4), 3 - 21, 英語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.
[査読有り]
研究論文（大学，研究機関等紀要）
- CERF, 2003年, Journal of Coastal Research, 33, 223 - 236, 英語Medium-term bathymetric change around jetties at Imagireguchi Inlet, Japan
[査読有り]
研究論文（学術雑誌）
- American Sciety for Civil Engineers, Portland, OR, USA, 2003年, Proc. Coastal Structures 2003, 1176 - 1188, 英語Complex principal component analysis of medium-term nearshore geomorphology at North Sendai Coast, Japan
[査読有り]
研究論文（国際会議プロシーディングス）
- 港湾空港技術研究所, 2002年, 港湾空港技術研究所報告, 41 (2), 3 - 22, 日本語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
[査読有り]
研究論文（大学，研究機関等紀要）
A short-term field observation was conducted to investigate hydrodynamics, sediment suspension and morphological processes on an intertidal flat. The topography on the tidal flat was found to fluctuate by about 8 cm during two weeks although long-term accumulation rate was estimated to be only about 4 cm/y. Suspended sediment concentrations were highly correlated with bed shear stress due to tidal current, wind-induced current and wave. Episodic erosions were frequently observed with high turbidities, which were caused by relatively high wave and strong current between the high water and the mean water during ebb tide.
AMER SOC CIVIL ENGINEERS, 2001年, COASTAL DYNAMICS '01: PROCEEDINGS, 1038 - 1047, 英語[査読有り]
研究論文（国際会議プロシーディングス）
Submarine groundwater discharge (SGWD) and associated nutrient fluxes at Hasaki Beach along the Kashima coast in Japan were investigated through field measurements and numerical simulations. The field data indicate that (1) groundwater has higher concentrations of land-derived nutrients than seawater and river water; (2) microbial activity near the shoreline is likely to induce mineralization, reduction, and oxidation of nitrogen and phosphorus; and (3) in the portion of the aquifer underlying coastal forest, nitrate is appreciably reduced. A numerical model incorporating effects of water table and tidal fluctuations was developed to evaluate SGWD. Assuming that the aquifer consists of homogeneous sandy soil, the simulation results show that the nutrient flux due to SGWD is less than that of Tone River discharge. The nutrient flux via groundwater seepage is considered to be a minor component of primary productivity in the surf zone.
AMER GEOPHYSICAL UNION, 2000年06月, WATER RESOURCES RESEARCH, 36 (6), 1467 - 1479, 英語[査読有り]
研究論文（学術雑誌）
- 港湾技術研究所, 2000年, 港湾技術研究所報告, 39 (3), 3 - 18, 日本語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
[査読有り]
研究論文（大学，研究機関等紀要）
- IAHR, Yokohama, Japan, 2000年, Proc. 4th International Conference on Hydrodynamics, 797 - 802, 英語Formation of longitudinal vortices generated by wind-driven current in the nearshore sea
[査読有り]
研究論文（国際会議プロシーディングス）
- 港湾技術研究所, 1999年, 港湾技術研究所報告, 38 (2), 3 - 27, 日本語潮位変動および密度の非一様性を考慮した砂浜海岸地下水の非定常過程に関する数値解析
[査読有り]
研究論文（大学，研究機関等紀要）
- 土木学会, 1995年, 水工学論文集, 39, 189 - 196, 日本語夏季砂浜海岸の熱収支構造と人体の快適性
[査読有り]
研究論文（学術雑誌）
MISC
- （公社）瀬戸内海環境保全協会, 2019年03月, 瀬戸内海, 77, 50–51, 日本語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
[招待有り]
記事・総説・解説・論説等（学術雑誌）
- 土木学会, 2018年11月, 土木学会誌, 2018年11月号, 46–47, 日本語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
[招待有り]
記事・総説・解説・論説等（学術雑誌）
- 2017年02月, 土木学会北海道支部論文報告集(CD-ROM), (73), ROMBUNNO.B‐04, 日本語ディスドロメータを用いた野外飛沫観測
- ディスドロメータを用いた強風下での飛沫観測
地球温暖化に伴う海面の上昇は，台風の頻度と強度，及び他の極端現象と関係を有する．既往研究は，海上に生じる飛沫が台風の発達に寄与することを示した．しかし飛沫の影響及び発生メカニズムは不明点があり，現在広く使用されている気象モデル及び天気予報には飛沫の影響は考慮されていない．そこで発表者らは飛沫の正確な観測データから解析を行い不明点を解明するべく，ピストン式造波装置付き水路を用いた風洞実験を行っている．しかし実験室スケールの実験は台風のスケールと異なるので，台風を直接観測したデータを利用して比較解析する必要がある．本研究は発表者らによる和歌山県近郊の田辺湾に設置した飛沫の粒径観測の結果をレポートするものである．今回の使用した観測機器パーシベルは本来雨滴観測用に用いられる観測機器であるが，観測粒径範囲が他の観測機器より比較的大きいため今回の観測に利用した．上記の発表者らの観測地では，2015年の台風イベント発生時において，1.5~5.510mm粒径の飛沫が観測された．発表時には，観測地に基づく強風下における飛沫と風速の関係を議論する．
水文・水資源学会, 2016年, 水文・水資源学会研究発表会要旨集, 29 (0), 日本語 - 2015年09月02日, 地球環境シンポジウム講演集, 23rd, 149 - 150, 日本語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
- 陸棚から砕波帯までを考慮した沿岸流動モデル
陸棚から砕波帯までを考慮した沿岸流動モデルでは,浅海域のダイナミクスに対して特に重要となる波浪の影響を正確 に考慮すること,および沖合流動の影響を取り込むためのマルチネスティング技術によるダウンスケーリングが同時に必 要となる.本報では,領域海洋循環モデル ROMS に対して波の位相平均効果を精緻に考慮した ROMS-WEC モデル (Uchiyama et al., 2010)の概要と5段ネストモデリングによる米国南カリフォルニア湾への適用事例について,波-流 れ相互作用理論の導出に関する経緯を含めて紹介する.ROMS-WEC モデルでは,保存的な波浪の作用である vortex force, Stokes-Coriolis force, Bernoulli head と,砕波帯で重要となる水深依存性の砕波に伴う波
日本海洋学会沿岸海洋研究会, 2015年02月, 沿岸海洋研究, Vol.52 (2), 149 - 158, 日本語[査読有り][招待有り]
記事・総説・解説・論説等（学術雑誌）
- 港湾海岸防災協議会, 2000年, 波となぎさ, 144, 69 - 73, 日本語海辺の快適さと環境要因
[招待有り]
記事・総説・解説・論説等（商業誌、新聞、ウェブメディア）
- 土木学会, 2014年09月, 地球環境シンポジウム講演集, 22, 211 - 215, 日本語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
書籍等出版物
- 分担執筆, 沿岸域への影響：砕波帯周辺で生じる3次元組織渦構造, 月間海洋, Vol. 51, No. 8, 海洋出版, pp. 406–412., 2019年08月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
- その他, John Wiley & Sons, 2019年03月, 英語, 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: 1119428343Multiscale routes to supply nutrients through the Kuroshio nutrient stream, In: Kuroshio Current: Physical, Biogeochemical and Ecosystem Dynamics
学術書
- 共編者(共編著者), Academic Press, 2019年03月, 英語, ISBN: 9780128130810Encyclopedia of Ocean Sciences 3rd Edition
事典・辞書
- 単著, オーム社, 2013年01月, 日本語, ISBN: 9784274213205ゼロから学ぶ土木の基本 水理学
教科書・概説・概論
講演・口頭発表等
- Kobe University Academic Research and Education Forum on Water and Environment co-organized with The University of Western Australia (online), 2021年11月04日, 英語Generation mechanism of tidally-driven submesoscale eddies in an estuary
[招待有り]
シンポジウム・ワークショップパネル（指名）
- The 3rd JSCE-CCES Joint Symposium Online, 2021年10月21日, 英語Marine environmental assessments in Japan based on a multi-nested 3-D circulation model
[招待有り]
口頭発表（招待・特別）
- 4th International Symposium on Green and Sustainable Technology (ISGST) 2021 (online), 2021年10月04日, 英語Generation Mechanism of Tidally-driven Whirlpools at a Narrow Strait in an Estuary
口頭発表（一般）
- 2021年度日本海洋学会秋季大会（オンライン開催）, 2021年09月15日, 日本語マルチクラス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
口頭発表（一般）
- 渦の魅力フォーラム2021（オンライン開催）, 2021年05月15日, 日本語鳴門海峡でなぜ渦が発生するか
[招待有り]
公開講演，セミナー，チュートリアル，講習，講義等
- EMECS海洋環境科学セミナー2020, 2020年12月12日, 日本語最先端の計算科学技術と海洋環境研究
[招待有り]
公開講演，セミナー，チュートリアル，講習，講義等
- EMECS海洋環境科学セミナー2020, 2020年12月12日, 日本語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，
[招待有り]
公開講演，セミナー，チュートリアル，講習，講義等
- 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), 2019年11月29日, 英語Nearshore transport of suspended radiocesium in the Fukushima coast derived from Niida River during Typhoon Wipha in fall 2013
[招待有り]
シンポジウム・ワークショップパネル（指名）
- 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, 2019年05月25日, 日本語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，
口頭発表（一般）
- 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, 2019年05月25日, 日本語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
口頭発表（一般）
- Offshore Engineering Lecture Series at Civil and Environmental Engineering Department, Universiti Teknologi Petronas, Bandar Seri Iskandar, Perak, Malaysia, 2019年04月29日, 英語Evolution of downscaling ocean modeling and its application to the metocean forcing evaluation for offshore structures around Malaysia
[招待有り]
公開講演，セミナー，チュートリアル，講習，講義等
- 20th Pacific Asian Marginal Seas (PAMS 2019), 2019年03月, 英語, Kaohsiung, Taiwan, 国際会議Multiple-scale variations of wind-generated wave in the Southern California Bight
ポスター発表
- 20th Pacific Asian Marginal Seas (PAMS 2019), 2019年03月, 英語, Kaohsiung, Taiwan, 国際会議Interisland coral connectivity across the Nansei Archipelago, the East China Sea: Dynamical influences of the Kuroshio
口頭発表（一般）
- 20th Pacific Asian Marginal Seas (PAMS 2019), 2019年03月, 英語, Kaohsiung, Taiwan, 国際会議A medium-term reanalysis of synoptic circulations in the South China Sea using a HYCOM-ROMS downscaling ocean model
ポスター発表
- 7th International Symposium on Data Assimilation (ISDA2019), 2019年01月, 英語, Kobe, Japan, 国際会議A preliminary analysis of a newly-developed regional ocean data assimilation system: A case of Tokyo Bay in summer
口頭発表（一般）
- AGU Fall Meeting 2018, 2018年12月, 英語, Washington D.C., USA, 国際会議Nonlinear internal waves and mixing generated by an interaction of background flows and tides
口頭発表（一般）
- AGU Fall Meeting 2018, 2018年12月, 英語, Washington D.C., USA, 国際会議Enhancement of interisland coral connectivity by the Kuroshio across the Nansei Archipelago, the East China Sea
口頭発表（一般）
- AGU Fall Meeting 2018, 2018年12月, 英語, Washington D.C., USA, 国際会議Can alternative operations at a sewage treatment plant reduce accumulation of the effluent in an adjacent seaweed farm?
ポスター発表
- AGU Fall Meeting 2018, 2018年12月, 英語, Washington D.C., USA, 国際会議Analysis on 3D structures of oceanic mesoscale eddies in the North Pacific by using a velocity-based eddy detection algorithm
ポスター発表
- 日本サンゴ礁学会第21回大会, 2018年11月, 日本語, 琉球大学, 国内会議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
ポスター発表
- Special Seminar at Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman (UTAR), 2018年11月, 英語, Kampar, Perak, Malaysia, 国際会議Downscaling ocean modeling and its application to coastal environmental problems
[招待有り]
口頭発表（招待・特別）
- 平成30年度瀬戸内海研究フォーラム in 兵庫, 2018年08月, 日本語, 神戸大学, 国内会議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
ポスター発表
- 平成30年度瀬戸内海研究フォーラム in 兵庫, 2018年08月, 英語, 神戸大学, 国内会議大阪湾におけるノリ養殖場への処理水の影響とその対策効果
ポスター発表
- H30年度複雑熱流体工学研究センター学生発表会, 2018年07月, 日本語, 神戸大学, 国内会議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
ポスター発表
- H30年度複雑熱流体工学研究センター学生発表会, 2018年07月, 英語, 神戸大学, 国内会議Numerical assessment of sewage effluent on a seaweed farm in the northeastern Seto Inland Sea, Japan
ポスター発表
- 2nd International Workshop on Regional Ocean Modeling and Observation, 2018年07月, 英語, Nanjing University of Information Science and Technology (NUIST), Nanjing, China, C, 国際会議Multiple-scale variations of wind-wave in the Southern California Bight
ポスター発表
- 2nd International Workshop on Regional Ocean Modeling and Observation, 2018年07月, 英語, Nanjing University of Information Science and Technology (NUIST), Nanjing, China, 国際会議Impacts of wastewater effluent on a seaweed farm in Osaka Bay in different discharge scenarios
ポスター発表
- 2nd International Workshop on Regional Ocean Modeling and Observation, 2018年07月, 英語, Nanjing University of Information Science and Technology (NUIST), Nanjing, China, 国際会議A post-disaster assessment on coastal dispersal of suspended radio-cesium after the Fukushima nuclear accident with a coupled river-ocean-wave-sediment model
[招待有り]
口頭発表（招待・特別）
- 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, 2018年06月, 日本語, 筑波大学, 国内会議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
[招待有り]
シンポジウム・ワークショップパネル（指名）
- AOGS 15th Annual Meeting (AOGS 2018), 2018年06月, 英語, Honolulu, HI, USA, 国際会議Seasonal variability of eddy-induced vertical nutrient flux and associated upper-ocean primary production along the Kuroshio
口頭発表（一般）
- AOGS 15th Annual Meeting (AOGS 2018), 2018年06月, 英語, Honolulu, HI, USA, 国際会議Research on the multi-scale spatial and temporal variation of waves in the Southern California Bight
口頭発表（一般）
- RinkaiHackathon2018, 2018年06月, 英語, Marine Biological Laboratory, Hiroshima University at Mukaishima Island, Japan, 国際会議Oceanic Dynamics and Modeling: Implications to marine biological connectivity studies
[招待有り]
口頭発表（招待・特別）
- Japan Geoscience Union Meeting 2018 (JpGU 2018), 2018年05月, 英語, Chiba, Japan, 国際会議Multiscale transport, stirring, and mixing processes to supply nutrients through the Kuroshio nutrient stream
口頭発表（一般）
- Japan Geoscience Union Meeting 2018 (JpGU 2018), 2018年05月, 英語, Chiba, Japan, 国際会議Highly nonlinear internal waves excited by an interaction of tides and the Kuroshio, Japan
口頭発表（一般）
- European Geosciences Union General Assembly 2018 (EGU2018), 2018年04月, 英語, Vienna, Austria, 国際会議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
ポスター発表
- 2018 Ocean Sciences Meeting, 2018年02月, 英語, Portland, OR, USA, 国際会議On the Interaction of Eddies and Surface Waves in Southern California
口頭発表（一般）
- 2017年度日本海洋学会秋季大会, 2017年10月, 日本語, 仙台市, 国内会議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
口頭発表（一般）
- AOGS 14th Annual Meeting (AOGS 2017), 2017年08月, 英語, Singapore, 国際会議Submesoscale eddy-induced mixing and dispersion of radioactive tracer off the northeastern Pacific coast of Japan
口頭発表（一般）
- AOGS 14th Annual Meeting (AOGS 2017), 2017年08月, 英語, Singapore, 国際会議Numerical simulations of the interaction between internal waves and the Kuroshio Current over the Izu-Ogasawara Ridge
口頭発表（一般）
- AOGS 14th Annual Meeting (AOGS 2017), 2017年08月, 英語, Singapore, 国際会議Inter-annual and seasonal variability of upper-ocean primary production along the Kuroshio off Japan
口頭発表（一般）
- AOGS 14th Annual Meeting (AOGS 2017), 2017年08月, 英語, Singapore, 国際会議Impact of the Kuroshio on dispersal of coral spawn and larvae around Ryukyu Islands in the East China Sea
口頭発表（一般）
- AOGS 14th Annual Meeting (AOGS 2017), 2017年08月, 英語, Singapore, 国際会議Eddy analysis in the North Pacific based on altimetry-derived surface currents
口頭発表（一般）
- AOGS 14th Annual Meeting (AOGS 2017), 2017年08月, 英語, Singapore, 国際会議A high-resolution coastal forecasting system with a 3DVAR assimilation optimal for a semi-enclosed estuary
口頭発表（一般）
- 平成29年度土木学会関西支部年次学術講演会, 2017年05月, 日本語, 大阪工業大学，大阪市, 国内会議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
口頭発表（一般）
- JpGU-AGU Joint Meeting 2017, 2017年05月, 英語, Chiba, Japan, 国際会議Numerical simulations of internal wave dynamics in the vicinity of Izu-Oshima Island, off Sagami Bay, Japan
口頭発表（一般）
- 19th Pacific-Asian Marginal Seas Meeting (PAMS 2017), 2017年04月, 英語, Jeju, South Korea, 国際会議On generation and propagation of oceanic mesoscale eddies in the North Pacific analyzed with an eddy-tracking algorithm
ポスター発表
- 19th Pacific-Asian Marginal Seas Meeting (PAMS 2017), 2017年04月, 英語, Jeju, South Korea, 国際会議Model assessment of wastewater effluent on a seaweed farm in Osaka Bay, Japan
ポスター発表
- 19th Pacific-Asian Marginal Seas Meeting (PAMS 2017), 2017年04月, 英語, Jeju, South Korea, 国際会議Meridional transition of upper-ocean primary productivity due to diapycnal eddy mixing across the Kuroshio off Japan
口頭発表（一般）
- 19th Pacific-Asian Marginal Seas Meeting (PAMS 2017), 2017年04月, 英語, Jeju, South Korea, 国際会議Intrinsic low-frequency variability in transient three-dimensional rip currents
ポスター発表
- European Geosciences Union General Assembly 2017 (EGU2017), 2017年04月, 英語, Vienna, Austria, 国際会議Drop size distribution under severe wind condition in marine observation and wind-tunnel experiment
口頭発表（一般）
- 19th Pacific-Asian Marginal Seas Meeting (PAMS 2017), 2017年04月, 英語, Jeju, South Korea, 国際会議Development of a coastal forecasting system with a 3DVAR assimilation for the Seto Inland Sea, Japan
ポスター発表
- 第18回環境放射能研究会, 2017年03月, 日本語, 筑波大学，茨城県筑波市, 国内会議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
口頭発表（一般）
- 2nd International Symposium on Green and Sustainable Technology (ISGST2017), 2017年01月, 英語, Kampar, Malaysia, 国際会議Evolution of high-resolution regional ocean modeling: applications to waste water and larval dispersal in an estuary
口頭発表（基調）
- AGU Fall Meeting 2016, 2016年12月, 英語, San Francisco, CA, USA, 国際会議Quantifying coastal connectivity of coral spawn and larvae around Ryukyu Islands in the East China Sea
ポスター発表
- AGU Fall Meeting 2016, 2016年12月, 英語, San Francisco, CA, USA, 国際会議Modeling nearshore dispersal of river-derived multi-class suspended sediments and radionuclides during a flood event around the mouth of Niida River, Fukushima, Japan
口頭発表（一般）
- AGU Fall Meeting 2016, 2016年12月, 英語, San Francisco, CA, USA, 国際会議Impact of a diversion of sewage effluent on a seaweed farm in the Seto Inland Sea, Japan
ポスター発表
- AGU Fall Meeting 2016, 2016年12月, 英語, San Francisco, CA, USA, 国際会議Development of a three-dimensional variational data assimilation system for the Seto Island Sea, Japan
ポスター発表
- International workshop on field measurements in fluvial and coastal areas and the utilization of the observed data, 2016年11月, 英語, Wakayama, Japan, 国際会議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
口頭発表（基調）
- 2016年度日本海洋学会秋季大会, 2016年09月, 日本語, 鹿児島大学，鹿児島市, 国内会議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
口頭発表（一般）
- 2016年度日本海洋学会秋季大会, 2016年09月, 日本語, 鹿児島大学，鹿児島市, 国内会議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
口頭発表（一般）
- 2016年度日本海洋学会秋季大会, 2016年09月, 日本語, 鹿児島大学，鹿児島市, 国内会議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
口頭発表（一般）
- 2016年度日本海洋学会秋季大会, 2016年09月, 日本語, 鹿児島大学，鹿児島市, 国内会議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
口頭発表（一般）
- AOGS 13th Annual Meeting (AOGS 2016), 2016年08月, 英語, Beijing, China, 国際会議Utilizing a regional ocean model for weather routing for optimal vessel navigation
口頭発表（一般）
- AOGS 13th Annual Meeting (AOGS 2016), 2016年08月, 英語, Beijing, China, 国際会議Upper ocean dynamics and associated water exchange at the entrance of a semi-enclosed bay based on an in-situ ADCP measurement
口頭発表（一般）
- AOGS 13th Annual Meeting (AOGS 2016), 2016年08月, 英語, Beijing, China, 国際会議Surface mixing and dispersion of radioactive tracer due to submesoscale eddies off the northeastern Pacific coast of Japan
口頭発表（一般）
- AOGS 13th Annual Meeting (AOGS 2016), 2016年08月, 英語, Beijing, China, 国際会議Seasonal and inter-annual variability of larval dispersal and ambient currents in the Seto Inland Sea, Japan
口頭発表（一般）
- AOGS 13th Annual Meeting (AOGS 2016), 2016年08月, 英語, Beijing, China, 国際会議Modeling coastal dispersal of wastewater effluent from multiple sources in the Seto Inland Sea
口頭発表（一般）
- AOGS 13th Annual Meeting (AOGS 2016), 2016年08月, 英語, Beijing, China, 国際会議Influences of meso- and submeso-scale oceanic variability on the primary production in the Kuroshio region off Japan
口頭発表（一般）
- AOGS 13th Annual Meeting (AOGS 2016), 2016年08月, 英語, Beijing, China, 国際会議Impacts of typhoons on upper-ocean mixing and the Kuroshio in the northwestern Pacific Ocean
口頭発表（一般）
- AOGS 13th Annual Meeting (AOGS 2016), 2016年08月, 英語, Beijing, China, 国際会議Asymmetric oceanic responses around Okinawa Island in the East China Sea
口頭発表（一般）
- 平成28年度土木学会関西支部年次学術講演会, 2016年06月, 日本語, 立命館大学，滋賀県草津市, 国内会議細密気象・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
口頭発表（一般）
- 平成28年度土木学会関西支部年次学術講演会, 2016年06月, 日本語, 立命館大学，滋賀県草津市, 国内会議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
口頭発表（一般）
- 平成28年度土木学会関西支部年次学術講演会, 2016年06月, 日本語, 立命館大学，滋賀県草津市, 国内会議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
口頭発表（一般）
- 日本航海学会H28年度春季大会, 2016年05月, 日本語, 神戸市, 国内会議細密気象・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
口頭発表（一般）
- International Workshop on Regional Oceanic Modelling and Observation, 2016年05月, 英語, Nanjing, China, 国際会議Wave-current interaction in coastal and shelf seas
[招待有り]
口頭発表（招待・特別）
- Japan Geosciences Union Meeting 2016 (JpGU 2016), 2016年05月, 英語, Chiba, Japan, 国際会議Impact of mesoscale recirculation of the Kuroshio on asymmetric oceanic structure around Okinawa Island in the East China Sea
ポスター発表
- Japan Geosciences Union Meeting 2016 (JpGU 2016), 2016年05月, 英語, Chiba, Japan, 国際会議Forcing mechanism controlling the variability of circulations and associated larval transport in the Seto Inland Sea, Japan
口頭発表（一般）
- Japan Geosciences Union Meeting 2016 (JpGU 2016), 2016年05月, 英語, Chiba, Japan, 国際会議Coastal ocean processes responsible for radionuclide dispersion: A case study for Seto Inland Sea and Enshu-nada
口頭発表（一般）
- European Geosciences Union General Assembly 2016 (EGU2016), 2016年04月, 英語, Vienna, Austria, 国際会議Three-dimensional modeling of oceanic dispersal of land-derived multi-class suspended radionuclides after the Fukushima Dai-ichi accident
ポスター発表
- 2016年度日本海洋学会春季大会・講演要旨集, 2016年03月, 日本語, 東京大学本郷キャンパス，東京, 国内会議幼稚仔分散評価のための粒子追跡モデルの感度解析
口頭発表（一般）
- 2016年度日本海洋学会春季大会・講演要旨集, 2016年03月, 日本語, 東京大学本郷キャンパス，東京, 国内会議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
口頭発表（一般）
- 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, 2016年03月, 日本語, 東京大学本郷キャンパス，東京, 国内会議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
[招待有り]
口頭発表（招待・特別）
- Ocean Sciences Meeting 2016, 2016年02月, 英語, New Orleans, LA, USA, 国際会議Topographic effects on low-frequency variability in three-dimensional transient littoral currents
ポスター発表
- Ocean Sciences Meeting 2016, 2016年02月, 英語, New Orleans, LA, USA, 国際会議Near-inertial resonance, upper-ocean stirring and impacts on the Kuroshio path due to typhoons in the northwestern Pacific Ocean
ポスター発表
- Ocean Sciences Meeting 2016, 2016年02月, 英語, New Orleans, LA, USA, 国際会議Characterizing Stormwater Dispersion and Dilution from Small Coastal Streams
口頭発表（一般）
- Ocean Sciences Meeting 2016, 2016年02月, 英語, New Orleans, LA, USA, 国際会議Biogeochamical responses to meso- and submesoscale oceanic variability in the Kuroshio region
ポスター発表
- 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」, 2016年01月, 日本語, 神戸国際会議場, 国内会議津波・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
[招待有り]
口頭発表（招待・特別）
- Seminar on Simulation of Coastal Processes, 2015年11月, 英語, Kusatsu, Shiga, Japan, 国際会議Three-dimensional modeling of time-dependent wave-driven currents on a sandy beach
[招待有り]
口頭発表（招待・特別）
- The 2nd Open Science Symposium on Western Pacific Ocean Circulation and Climate (2nd OSS-2015), 2015年10月, 英語, Busan, South Korea, 国際会議Near-inertial resonance and upper-ocean stirring due to typhoons in the northwestern Pacific margin
口頭発表（一般）
- The 2nd Open Science Symposium on Western Pacific Ocean Circulation and Climate (2nd OSS-2015), 2015年10月, 英語, Busan, South Korea, 国際会議Influences of submesoscale eddies on synoptic and mesoscale dynamics in the Japan Sea
口頭発表（一般）
- 2015年度日本海洋学会秋季大会・講演要旨集, 2015年09月, 日本語, 愛媛大学，愛媛県松山市, 国内会議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
口頭発表（一般）
- 2015年度日本海洋学会秋季大会・講演要旨集, 2015年09月, 日本語, 愛媛大学，愛媛県松山市, 国内会議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
口頭発表（一般）
- 2015年度日本海洋学会秋季大会・講演要旨集, 2015年09月, 日本語, 愛媛大学，愛媛県松山市, 国内会議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
口頭発表（一般）
- 2015年度日本海洋学会秋季大会・講演要旨集, 2015年09月, 日本語, 愛媛大学，愛媛県松山市, 国内会議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
口頭発表（一般）
- International symposium on Submesoscale Oceanography : Prospect for a new world, JOS Fall Meeting 2015, 2015年09月, 英語, Matsuyama, Japan, 国際会議Submesoscale stirring of the Kuroshio in the East China Sea
[招待有り]
口頭発表（招待・特別）
- AOGS 12th Annual Meeting (AOGS 2015), 2015年08月, 英語, Singapore, 国際会議Modeling oceanic responses to typhoons in the northwestern Pacific margin
口頭発表（一般）
- Lagrangian Analysis and Prediction of Coastal and Ocean Dynamics (LAPCOD2015), 2015年07月, 英語, Winter Harbor, MA, USA, 国際会議Anisotropic Relative Dispersion near the Southern California Coast
口頭発表（一般）
- 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, 2015年05月, 日本語, 摂南大学，大阪府寝屋川市, 国内会議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
口頭発表（一般）
- 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, 2015年05月, 日本語, 福島大学，福島県福島市, 国内会議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－
[招待有り]
シンポジウム・ワークショップパネル（指名）
- 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, 2015年05月, 日本語, 摂南大学，大阪府寝屋川市, 国内会議Offline passive tracerモデルの開発と瀬戸内海西部海域への適用
口頭発表（一般）
- Japan Geoscience Union Meeting 2015 (JpGU2015), 2015年05月, 英語, Chiba, Japan, 国際会議Modeling dispersal of land-derived suspended radionuclides in the Fukushima coast
口頭発表（一般）
- Japan Geoscience Union Meeting 2015 (JpGU2015), 2015年05月, 英語, Chiba, Japan, 国際会議Coastal dispersal of the land-derived tracer in an estuary and a continental shelf margin
[招待有り]
口頭発表（招待・特別）
- 18th Pacific-Asian Marginal Seas Meeting (PAMS 2015), 2015年04月, 英語, Naha, Japan, 国際会議Topographic effects on submesoscale eddy mixing around the Kuroshio off the Ryukyu Islands
口頭発表（一般）
- 18th Pacific-Asian Marginal Seas Meeting (PAMS 2015), 2015年04月, 英語, Naha, Japan, 国際会議Oceanic and coastal responses to super typhoons in the northwestern Pacific marginal seas
口頭発表（一般）
- 18th Pacific-Asian Marginal Seas Meeting (PAMS 2015), 2015年04月, 英語, Naha, Japan, 国際会議Effects of fluctuating Kuroshio path on larval dispersal in the Seto Inland Sea
ポスター発表
- 18th Pacific-Asian Marginal Seas Meeting (PAMS 2015), 2015年04月, 英語, Naha, Japan, 国際会議Coastal dispersal of Eulerian passive tracer: Comparative experiments in an estuary and a continental shelf margin
ポスター発表
- 港湾空港技術研究所平成26年度海岸工学特別講演会, 2015年01月, 日本語, 独立行政法人港湾空港技術研究所, 横須賀, 国内会議波−流れ相互作用〜海浜流・漂砂・沿岸流動解析への応用
[招待有り]
口頭発表（招待・特別）
- AGU Fall Meeting 2014, 2014年12月, 英語, San Francisco, CA, USA, 国際会議Wave-current interaction in evolution of rip channel system
口頭発表（一般）
- AGU Fall Meeting 2014, 2014年12月, 英語, San Francisco, CA, USA, 国際会議Potential utility of three-dimensional temperature and salinity fields estimated from satellite altimetry and Argo data for improving mesoscale reproducibility in regional ocean modeling
口頭発表（一般）
- AGU Fall Meeting 2014, 2014年12月, 英語, San Francisco, CA, USA, 国際会議Modeling larval dispersal and quantifying coastal connectivity based on a downscaling ocean model in Seto Inland Sea, Japan
ポスター発表
- AGU Fall Meeting 2014, 2014年12月, 英語, San Francisco, CA, USA, 国際会議Impact of submesoscale eddies on synoptic and mesoscale oceanic structures in a continental shelf margin analyzed with a downscaling ocean model of Japan Sea
ポスター発表
- AGU Fall Meeting 2014, 2014年12月, 英語, San Francisco, CA, USA, 国際会議Enhancement of eddy heat transport due to the anticyclonic submesoscale eddies around Ryukyu Islands near Kuroshio in East China Sea
ポスター発表
- AGU Fall Meeting 2014, 2014年12月, 英語, San Francisco, CA, USA, 国際会議A regional sediment transport modeling for assessing dispersal and recirculation of land-derived radionuclides in the Fukushima coast
ポスター発表
- 日本流体力学会年会2014講演論文集, 2014年09月, 日本語, 国内会議陸棚循環流に対する波-流れ相互作用の効果について
口頭発表（一般）
- 第22回地球環境シンポジウム講演集, 2014年09月, 日本語, 土木学会, 国内会議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
ポスター発表
- 2014年度日本海洋学会秋季大会・講演要旨集, 2014年09月, 日本語, 長崎大学, 国内会議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
口頭発表（一般）
- 2014年度日本海洋学会秋季大会・講演要旨集, 2014年09月, 日本語, 長崎大学, 国内会議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
口頭発表（一般）
- 2014年度日本海洋学会秋季大会・講演要旨集, 2014年09月, 日本語, 長崎大学, 国内会議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
口頭発表（一般）
- 2014年度日本海洋学会秋季大会・講演要旨集, 2014年09月, 日本語, 長崎大学, 国内会議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
口頭発表（一般）
- クリタ水・環境科学研究優秀賞受賞講演会, 2014年09月, 英語, Tokyo, Japan, 国内会議Regional circulation and dispersal in Seto Inland Sea with offshore influences: Towards an effective estuarine environmental protection strategy
[招待有り]
口頭発表（招待・特別）
- 61st Annual Eastern Pacific Ocean Conference (EPOC 2014), 2014年09月, 英語, Mt. Hood, OR, USA, 国際会議Inner Shelf Dispersion and Dilution of Creek Runoff
口頭発表（一般）
- AOGS 11th Annual Meeting (AOGS 2014), 2014年07月, 英語, Sapporo, Japan, 国際会議Topographic effects of Ryukyu Islands on the enhancement of submesoscale anticyclonic eddies on the eastern side of Kuroshio in East China Sea
口頭発表（一般）
- AOGS 11th Annual Meeting (AOGS 2014), 2014年07月, 英語, Sapporo, Japan, 国際会議Stochastic analysis with coastal connectivity on larval networks in the Seto Inland Sea
ポスター発表
- AOGS 11th Annual Meeting (AOGS 2014), 2014年07月, 英語, Sapporo, Japan, 国際会議Experimental development of ocean prediction system for accidental radionuclide dispersion
ポスター発表
- AOGS 11th Annual Meeting (AOGS 2014), 2014年07月, 英語, Sapporo, Japan, 国際会議Effects of wave-current interaction on the inner-shelf eddying flows
口頭発表（一般）
- AOGS 11th Annual Meeting (AOGS 2014), 2014年07月, 英語, Sapporo, Japan, 国際会議Development of a regional sediment transport model for dispersal of land-derived radionuclides in the ocean
口頭発表（一般）
- AOGS 11th Annual Meeting (AOGS 2014), 2014年07月, 英語, Sapporo, Japan, 国際会議Cold water formation in response to typhoon passages in and around Seto Inland Sea, Japan
口頭発表（一般）
- AOGS 11th Annual Meeting (AOGS 2014), 2014年07月, 英語, Sapporo, Japan, 国際会議A retrospective high-resolution numerical experiment of Japan Sea with a JCOPE2-ROMS downscaling system
口頭発表（一般）
- 日本地球惑星科学連合2014年大会, 2014年05月, 日本語, 横浜, 国際会議放射性核種の海域移行解析のための河口・沿岸域土砂輸送モデルの開発
口頭発表（一般）
- 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, 2014年05月, 日本語, 土木学会関西支部, 国内会議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
口頭発表（一般）
- 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, 2014年05月, 日本語, 土木学会関西支部, 国内会議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
口頭発表（一般）
- 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, 2014年05月, 日本語, 土木学会関西支部, 国内会議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
口頭発表（一般）
- Japan Geoscience Union Meeting 2014 (JpGU2014), 2014年05月, 英語, Yokohama, Japan, 国際会議Heat budget analysis on cooling events associated with typhoon passages in Seto Inland Sea, Japan
口頭発表（一般）
- 2014年度日本海洋学会春季大会・講演要旨集, 2014年03月, 日本語, 東京海洋大学品川キャンパス, 国内会議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
口頭発表（一般）
- 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－, 2014年03月, 日本語, 東京海洋大学品川キャンパス, 国内会議陸棚から砕波帯までを考慮した沿岸流動モデル
[招待有り]
口頭発表（招待・特別）
- 2014年度日本海洋学会春季大会・講演要旨集, 2014年03月, 日本語, 東京海洋大学品川キャンパス, 国内会議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
口頭発表（一般）
- 2014年度日本海洋学会春季大会・講演要旨集, 2014年03月, 日本語, 東京海洋大学品川キャンパス, 国内会議波−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
口頭発表（一般）
- 2014年度日本海洋学会春季大会・講演要旨集, 2014年03月, 日本語, 国内会議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
口頭発表（一般）
- Ocean Sciences Meeting 2014, 2014年02月, 英語, Honolulu, HI, USA, 国際会議Wave-current interaction in the surfzone-inner shelf circulations
ポスター発表
- Ocean Sciences Meeting 2014, 2014年02月, 英語, Honolulu, HI, USA, 国際会議Nearshore anisotropic relative dispersion in Southern California
ポスター発表
- Ocean Sciences Meeting 2014, 2014年02月, 英語, Honolulu, HI, USA, 国際会議Model-Data Comparison of Surfzone and Inner-Shelf Circulation during HB06
口頭発表（一般）
- Ocean Sciences Meeting 2014, 2014年02月, 英語, Honolulu, HI, USA, 国際会議Cooling the upper ocean around Seto Inland Sea due to typhoons
ポスター発表
- Model & Simulation研究会, 2013年12月, 日本語, 東北大学青葉記念会館, 国内会議福島第一原発からの放射性核種の沿岸海洋拡散再解析
[招待有り]
口頭発表（招待・特別）
- 2013年度日本海洋学会秋季大会・講演要旨集, 2013年09月, 日本語, 北海道大学，札幌, 国内会議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
口頭発表（一般）
- 日本流体力学会年会2013講演論文集, 2013年09月, 日本語, 国内会議波-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
口頭発表（一般）
- 2013年度日本海洋学会秋季大会・講演要旨集, 2013年09月, 日本語, 北海道大学，札幌, 国内会議波−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
口頭発表（一般）
- 日本流体力学会年会2013講演論文集, 2013年09月, 日本語, 国内会議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
口頭発表（一般）
- 日本流体力学会年会2013講演論文集, 2013年09月, 日本語, 国内会議大阪湾における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
口頭発表（一般）
- 2013年度日本海洋学会秋季大会・講演要旨集, 2013年09月, 日本語, 北海道大学，札幌, 国内会議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
口頭発表（一般）
- 32nd Int'l Conf. on Simulation Technology (JSST2013), 2013年09月, 英語, Tokyo, Japan, 国際会議Wave-current interaction in morphological change on a barred beach
口頭発表（一般）
- 32nd Int'l Conf. on Simulation Technology (JSST2013), 2013年09月, 英語, Tokyo, Japan, 国際会議Wastewater dispersal in Osaka Bay and Harima Nada using a multi-nested high-resolution ocean modeling
口頭発表（一般）
- 32nd Int'l Conf. on Simulation Technology (JSST2013), 2013年09月, 英語, Tokyo, Japan, 国際会議Surfzone-inner shelf interaction analyzed with a quintuple nested high resolution ocean model
口頭発表（一般）
- Oceans 2013 MTS/IEEE, 2013年09月, 英語, San Diego, CA, USA, 国際会議Principal component analysis on horizontal acoustic Doppler current profilers measurement
口頭発表（一般）
- 32nd Int'l Conf. on Simulation Technology (JSST2013), 2013年09月, 英語, Tokyo, Japan, 国際会議A numerical study of effects of submesoscale anticyclonic eddies induced by Kuroshio around Ryukyu Islands
口頭発表（一般）
- 日本流体力学会年会2013講演論文集, 2013年09月, 日本語, 国内会議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
口頭発表（一般）
- International Workshop on Ocean Waves and Related Processes, 2013年07月, 英語, Yokohama, Japan, 国際会議Wave-current interaction in inner shelf circulation: a high resolution regional ocean modeling with a vortex-force formalism
[招待有り]
口頭発表（招待・特別）
- 土木学会関西支部年次学術講演会・講演概要集, 2013年05月, 日本語, 国内会議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
口頭発表（一般）
- 土木学会関西支部年次学術講演会・講演概要集, 2013年05月, 日本語, 国内会議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
口頭発表（一般）
- 土木学会関西支部年次学術講演会・講演概要集, 2013年05月, 日本語, 国内会議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
口頭発表（一般）
- Japan Geoscience Union Meeting 2013, 2013年05月, 英語, Chiba, Japan, 国際会議Initial oceanic dispersion mechanism of radionuclides released from Fukushima
口頭発表（一般）
- 2013年度日本海洋学会春季大会・講演要旨集, 2013年03月, 日本語, 東京海洋大学，東京都港区, 国内会議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
口頭発表（一般）
- 2013年度日本海洋学会春季大会・講演要旨集, 2013年03月, 日本語, 東京海洋大学，東京都港区, 国内会議超高解像度3次元海洋モデルによる砕波帯‐陸棚相互作用の解析
口頭発表（一般）
- 2013年度日本海洋学会春季大会・講演要旨集, 2013年03月, 日本語, 東京海洋大学，東京都港区, 国内会議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
口頭発表（一般）
- ASLO Aquatic Sciences Meeting 2013, 2013年02月, 英語, New Orleans, LA, USA, 国際会議Typhoons alter dispersal patterns in the Kuroshio Current system
口頭発表（招待・特別）
- AGU Fall Meeting 2012, 2012年12月, 英語, San Francisco, CA, USA, 国際会議Submesoscale Frontal Dynamics in the Kuroshio Extension Jet
口頭発表（一般）
- AGU Fall Meeting 2012, 2012年12月, 英語, San Francisco, CA, USA, 国際会議Impact of the Kurishio paths on oceanic and estuarine circulations in and around Seto Inland Sea, Japan
口頭発表（一般）
- AGU Fall Meeting 2012, 2012年12月, 英語, San Francisco, CA, USA, 国際会議Coastal dispersal of radionuclides released from the Fukushima Nuclear Power Plant
口頭発表（一般）
- 1st International Conference on Frontiers in Computational Physics: Modeling the Earth System, 2012年12月, 英語, Boulder, CO, USA, 国際会議A method to characterize the spatial structure of superdepth-scale near-bank vortices, with a view to operational monitoring
口頭発表（一般）
- 日本流体力学会年会2012講演論文集, 2012年09月, 日本語, 国内会議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
口頭発表（一般）
- ASLO Aquatic Sciences Meeting 2012, 2012年07月, 英語, Otsu, Japan, 国際会議Transient thermal plume dispersal in the Hudson River estuary
口頭発表（一般）
- International Symposium on Watercourse Sensing and Operational Monitoring, 2012年07月, 英語, Otsu, Japan, 国際会議Oceanic circulations in the Southern California Bight from a multi-nested high-resolution forward model
[招待有り]
口頭発表（招待・特別）
- ASLO Aquatic Sciences Meeting 2012, 2012年07月, 英語, Otsu, Japan, 国際会議Interaction between the Kuroshio intrusion and intrinsic variability in Seto Inland Sea, Japan
口頭発表（一般）
- ASLO Aquatic Sciences Meeting 2012, 2012年07月, 英語, Otsu, Japan, 国際会議A downscaling experiment on reproducibility of the Kuroshio off Japan
口頭発表（一般）
- 土木学会関西支部年次学術講演会・講演概要集, 2012年05月, 日本語, 国内会議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
口頭発表（一般）
- 土木学会関西支部年次学術講演会・講演概要集, 2012年05月, 日本語, 国内会議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
口頭発表（一般）
- 土木学会関西支部年次学術講演会・講演概要集, 2012年05月, 日本語, 国内会議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
口頭発表（一般）
- 4th International Workshop on Modeling the Ocean (IWMO-2012), 2012年05月, 英語, Yokohama, Japan, 国際会議Three-dimensional unsteady wave-driven littoral currents
口頭発表（一般）
- 4th International Workshop on Modeling the Ocean (IWMO-2012), 2012年05月, 英語, Yokohama, Japan, 国際会議Oceanic responses to surface gravity waves in the Southern California Bight
ポスター発表
- 4th International Workshop on Modeling the Ocean (IWMO-2012), 2012年05月, 英語, Yokohama, Japan, 国際会議Oceanic dispersion of cesium-137 off the north-eastern Pacific coast of Japan
ポスター発表
- 4th International Workshop on Modeling the Ocean (IWMO-2012), 2012年05月, 英語, Yokohama, Japan, 国際会議Effects of wave-current interaction on development of rip currents
ポスター発表
- 2012年度日本海洋学会春季大会・講演要旨集, 2012年03月, 日本語, 茨城県筑波市, 国内会議東北・北関東太平洋沿岸域における放射性物質の海洋分散
口頭発表（一般）
- 2012年度日本海洋学会春季大会・講演要旨集, 2012年03月, 日本語, 茨城県筑波市, 国内会議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
口頭発表（一般）
- 2012年度日本海洋学会春季大会・講演要旨集, 2012年03月, 日本語, 茨城県筑波市, 国内会議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
口頭発表（一般）
- The Third Korea-Japan Mini Symposium on Modeling and Measurements of Hydraulic Flows, 2012年03月, 英語, 神戸大学大学院工学研究科市民工学専攻, 神戸大学大学院工学研究科市民工学専攻, 国際会議Nearshore dispersion of the radioactive cesium 137 leaked from the Fukushima I Power Plant
口頭発表（一般）
- Ocean Sciences Meeting, 2012年02月, 英語, Salt Lake City, UT, USA, 国際会議Highly-resolved computations in the Hudson River Estuary
ポスター発表
- 2011年度日本海洋学会秋季大会・講演要旨集, 2011年09月, 日本語, 福岡県福岡市, 国内会議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
口頭発表（一般）
- Ocean Sciences Meeting 2010, 2010年02月, 英語, American Geophysical Union, Portland, OR, USA, 国際会議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
[招待有り]
口頭発表（招待・特別）
- Ocean Sciences Meeting 2010, 2010年02月, 英語, American Geophysical Union, Portland, OR, USA, 国際会議Non-tidal Variability in Semidiurnal Internal Tide Generation in the Southern California Bight
ポスター発表
- Ocean Sciences Meeting 2010, 2010年02月, 英語, American Geophysical Union, Portland, OR, USA, 国際会議Applications of Regional Ocean Modeling System (ROMS) for surf zone environment
ポスター発表
- 2009 ROMS/TOMS Asia-Pacific Workshop, 2009年, 英語, University of New South Wales, Sydney, Australia, 国際会議Wave-current interaction in ROMS: A vortex-force formalism
口頭発表（一般）
- The 5th WMO Symposium on Data Assimilation, 2009年, 英語, WMO, Melbourne, Australia, 国際会議Ensemble Data Assimilation for Idealized California Current System with ROMS-LETKF
口頭発表（一般）
- Ocean Sciences Meeting 2008, 2008年02月, 英語, American Geophysical Union, Orlando, FL, USA., 国際会議Submesoscale instability in subtidal inner shelf circulation off Palos Verdes, California
口頭発表（一般）
- 2007 ROMS/TOMS Users Workshop, 2007年, 英語, UCLA, Los Angeles, CA, USA, 国際会議A high- resolution nested simulation on non-cohesive suspended sediment transport around Palos Verdes, California
口頭発表（一般）
- Ocean Sciences Meeting 2006, 2006年02月, 英語, American Geophysical Union, Honolulu, HI, USA., 国際会議Simulating forced infragravity long-waves with ROMS
口頭発表（一般）
- 2005 ROMS/TOMS Users Workshop, 2005年, 英語, Scripps Institute of Oceanography, La Jolla, CA, USA., 国際会議Infragravity waves forced by surface wind waves in the central North Pacific Ocean
口頭発表（一般）
- AGU Chapmen Conference on Salt Marsh Geomorphology: Physical and Ecological Effects on Landform, 2004年, 英語, American Geophysical Union, Halifax, NS, Canada, 国際会議Intertidal sediment transport and morphological response in San Francisco Bay using modefied Princeton Ocean Model
ポスター発表
- AGU Fall Meeting 2003, 2003年12月, 英語, American Geophysical Union, San Francisco, CA, USA, 国際会議Modeling wetting and drying process in San Francisco Bay using the Princeton Ocean Model
ポスター発表
- EGS-AGU-EUG Joins Assembly, 2003年04月, 英語, European Geophysical Society, Nice, France, 国際会議Near-bed velocity and turbidity measurements at an intertidal estuarine sand-flat influenced by fluvial discharges
ポスター発表
- AGU Spring Meeting 2002, 2001年05月, 英語, American Geophysical Union, Washington DC, USA, 国際会議Hydrodynamic, sedimentological and morphological processes on Banzu intertidal sand-flat, Tokyo Bay, Japan
口頭発表（一般）
- 2nd Joint Meeting of the Coastal Environmental Science and Technology (CEST) Panel, 1999年, 英語, UJNR, Washington DC, USA, 国際会議Coastal groundwater flow and associated nutrient transport into the sea
口頭発表（一般）
- Ocean Sciences Meeting 2020, San Diego, CA, USA., 英語A robust regional downscaling ocean modeling for the Kuroshio region off Japan
[招待有り]
口頭発表（招待・特別）
- Ocean Sciences Meeting 2020, San Diego, CA, USA., 英語Effects of Wave Streaming and Wave Variations on Nearshore Wave-driven Circulation
口頭発表（一般）
- Ocean Sciences Meeting 2020, San Diego, CA, USA., 英語Biogeochemical responses to seasonal oceanic variability around a ridge area along the Kuroshio off Japan
ポスター発表
- AGU Fall Meeting 2019, San Francisco, CA, USA, 英語Identification of coral spawn supply source for restoration of the Sekisei Lagoon within the Kuroshio region
ポスター発表
- PICES-2019 – Connecting Science and Communities in a Changing North Pacific, Victoria, BC, Canada, 英語How the Kuroshio enriches the southern coast of Japan and its downstream regions?
口頭発表（一般）
- 2019年度日本海洋学会秋季大会，富山国際会議場, 日本語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
口頭発表（一般）
- AOGS 16th Annual Meeting (AOGS 2019), Singapore, 英語Mass and Heat Transport Generated by the Kuroshio and Tides Investigated with a High Resolution Downscaled Regional Oceanic Model
口頭発表（一般）
- AOGS 16th Annual Meeting (AOGS 2019), Singapore, 英語Medium-term water mass exchange and associated regional circulations in the South China Sea
口頭発表（一般）
- AOGS 16th Annual Meeting (AOGS 2019), Singapore, 英語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
口頭発表（一般）
- AOGS 16th Annual Meeting (AOGS 2019), Singapore, 英語Kuroshio-derived pinch-off mesoscale eddies: Generation, propagation, and recollision with the Kuroshio
口頭発表（一般）
- AOGS 16th Annual Meeting (AOGS 2019), Singapore, 英語Biogeochemical responses to seasonal oceanic variability along the Kuroshio
口頭発表（一般）
- Gordon Research Conference - Coastal Ocean Dynamics, Southern New Hampshire University, NH, USA., 英語Eddy-induced transports and meso- and submesoscale dynamics in coastal and shelf seas
[招待有り]
口頭発表（招待・特別）
- Japan Geoscience Union Meeting 2019 (JpGU 2019), Chiba, Japan, 日本語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）
口頭発表（一般）
- Japan Geoscience Union Meeting 2019 (JpGU 2019), Chiba, Japan, 日本語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）
口頭発表（一般）
- Japan Geoscience Union Meeting 2019 (JpGU 2019), Chiba, Japan, 英語Multiscale routes to supply nutrients through the Kuroshio nutrient stream
口頭発表（一般）
- Japan Geoscience Union Meeting 2019 (JpGU 2019), Chiba, Japan, 日本語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）
口頭発表（一般）
- Japan Geoscience Union Meeting 2019 (JpGU 2019), Chiba, Japan, 日本語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）
口頭発表（一般）
- Japan Geoscience Union Meeting 2019 (JpGU 2019), Chiba, Japan, 英語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）
口頭発表（一般）
- Japan Geoscience Union Meeting 2019 (JpGU 2019), Chiba, Japan, 英語Biogeochemical responses to seasonal oceanic variability along the Kuroshio
口頭発表（一般）
- 2nd International Conference on Civil and Environmental Engineering (ICCEE2022), 2022年01月05日, 英語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
[招待有り]
口頭発表（基調）
所属学協会
日本気象学会
2012年04月 - 2022年03月Asia Oceania Geosciences Society
日本地球惑星科学連合
American Geophysical Union
日本海洋学会
土木学会
共同研究・競争的資金等の研究課題
- 科学研究費補助金／基盤研究(A), 2018年04月 - 2023年03月, 研究代表者
競争的資金
- 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年, 研究代表者【CREST】黒潮域広域３次元海洋モデリング技術の開発と運用
競争的資金
- 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年, 研究代表者【CREST】黒潮域広域３次元海洋モデリング技術の開発と運用
競争的資金
- 科学研究費補助金／基盤研究(B), 2015年04月 - 2019年03月, 研究代表者
競争的資金
- 科学研究費補助金／新学術領域研究, 2015年04月 - 2017年03月, 研究代表者
競争的資金
- 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年, 研究代表者
競争的資金
- 科学研究費補助金／新学術領域研究, 2013年04月 - 2015年03月, 研究代表者
競争的資金
- 科学研究費補助金／基盤研究(C), 2012年04月 - 2015年03月, 研究代表者
競争的資金
- 科学研究費補助金／若手研究(スタートアップ), 2011年, 研究代表者
競争的資金
- 沿岸湿地・干潟における水理学および漂砂論
競争的資金
- Hydrodynamics and Morphodynamics on Coastal Weelands and Intertidal Flats.
競争的資金