Research activity information

• Oct. 2002 Gordon Bell Prize for Peak Performance, A 26.58 Tflops global atmospheric simulation with the spectral transform method on the Earth Simulator.

  Satoru Shingu, Hiroshi Takahara, Hiromitsu Fuchigami, Masayuki Yamada, Yoshinori Tsuda, Wataru Ohfuchi, Yuji Sasaki, Kazuo Kobayashi, Takashi Hagiwara, Shinichi Habata, Mitsuo Yokokawa, Hiroyuki Itoh, Kiyoshi Otsuka

• The Remarkable Scientist and Writer Ukichiro Nakaya and his "Black Moon" and "White Moon" Worlds

  Kevin Hamilton, Wataru Ohfuchi

  Aug. 2026


• Superrotation of Titan’s Stratosphere Driven by the Radiative Heating of the Haze Layer

  Motoki Sumi, Shin-ichi Takehiro, Wataru Ohfuchi, Hideko Nomura, Yuka Fujii

  Abstract Titan’s stratosphere has been observed in a superrotation state, where the atmosphere rotates many times faster than the surface does. Another characteristic of Titan’s atmosphere is the presence of a thick haze layer. In this paper, we performed numerical experiments using a general circulation model to explore the effects of the haze layer on the stratospheric superrotation. We employed a semigray radiation model of Titan’s atmosphere following McKay et al., which takes account of sunlight absorption by the haze particles. The phase change of methane or seasonal changes were not taken into account. Our model with radiation parameters tuned for Titan yielded a global eastward wind around the equator with larger velocities at higher altitudes, except at around 70 km, after 10⁵ Earth days. Although the atmosphere is not in an equilibrium state, the zonal wind profiles are approximately consistent with the observed one. By changing the parameters of the radiation model, we found that the intensity and the location of the maximum zonal wind velocity highly depended on the optical thickness and the altitude of the haze layer, respectively. Analysis of our experiments suggests that the quasi-stationary stratospheric superrotation is maintained by the balance between the meridional circulation decoupled from the surface and the eddies that transport angular momentum equatorward. This is different from, but similar to, the so-called Gierasch mechanism, in which momentum is supplied from the surface. This structure may explain the no-wind region at about 80 km in altitude.

  American Astronomical Society, Apr. 2022, The Astrophysical Journal, 928(2) (2), 149 - 149, English

  [Refereed]

  Scientific journal


• Planetary-scale streak structure reproduced in high-resolution simulations of the Venus atmosphere with a low-stability layer

  Hiroki Kashimura, Norihiko Sugimoto, Masahiro Takagi, Yoshihisa Matsuda, Wataru Ohfuchi, Takeshi Enomoto, Kensuke Nakajima, Masaki Ishiwatari, Takao M. Sato, George L. Hashimoto, Takehiko Satoh, Yoshiyuki O. Takahashi, Yoshi Yuki Hayashi

  Jan. 2019, Nature Communications, 10(1) (1), English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Simple sensitivity analysis using ensemble forecasts

  Takeshi Enomoto, Shozo Yamane, Wataru Ohfuchi

  2015, Journal of the Meteorological Society of Japan, 93(2) (2), 199 - 213, English

  [Refereed]

  Scientific journal


• The aqua-planet experiment (APE): CONTROL SST simulation

  Michael Blackburn, David L. Williamson, Kensuke Nakajima, Wataru Ohfuchi, Yoshiyuki O. Takahashi, Yoshi Yuki Hayashi, Hisashi Nakamura, Masaki Ishiwatari, John L. McGregor, Hartmut Borth, Volkmar Wirth, Helmut Frank, Peter Bechtold, Nils P. Wedi, Hirofumi Tomita, Masaki Satoh, Ming Zhao, Isaac M. Held, Max J. Suarez, Myong In Lee, Masahiro Watanabe, Masahide Kimoto, Yimin Liu, Zaizhi Wang, Andrea Molod, Kavirajan Rajendran, Akio Kitoh, Rachel Stratton

  2013, Journal of the Meteorological Society of Japan, 91(1 A) (1 A), 17 - 56, English

  [Refereed]

  Scientific journal


• The variety of forced atmospheric structure in response to tropical SST anomaly in the aqua-planet experiments

  Kensuke Nakajima, Yukiko Yamada, Yoshiyuki O. Takahashi, Masaki Ishiwatari, Wataru Ohfuchi, Yoshi Yuki Hayashi

  2013, Journal of the Meteorological Society of Japan, 91(1 A) (1 A), 143 - 193, English

  [Refereed]

  Scientific journal


• The variety of spontaneously generated tropical precipitation patterns found in APE results

  Kensuke Nakajima, Yukiko Yamada, Yoshiyuki O. Takahashi, Masaki Ishiwatari, Wataru Ohfuchi, Yoshi Yuki Hayashi

  2013, Journal of the Meteorological Society of Japan, 91(1 A) (1 A), 91 - 141, English

  [Refereed]

  Scientific journal


• The aqua-planet experiment (APE): Response to changed meridional SST profile

  David L. Williamson, Michael Blackburn, Kensuke Nakajima, Wataru Ohfuchi, Yoshiyuki O. Takahashi, Yoshi Yuki Hayashi, Hisashi Nakamura, Masaki Ishiwatari, John L. McGregor, Hartmut Borth, Volkmar Wirth, Helmut Frank, Peter Bechtold, Nils P. Wedi, Hirofumi Tomita, Masaki Satoh, Ming Zhao, Isaac M. Held, Max J. Suarez, Myong In Lee, Masahiro Watanabe, Masahide Kimoto, Yimin Liu, Zaizhi Wang, Andrea Molod, Kavirajan Rajendran, Akio Kitoh, Rachel Stratton

  2013, Journal of the Meteorological Society of Japan, 91(1 A) (1 A), 57 - 89, English

  [Refereed]

  Scientific journal


• Deep oceanic zonal jets constrained by fine-scale wind stress curls in the South Pacific Ocean: A high-resolution coupled GCM study

  B. Taguchi, R. Furue, N. Komori, A. Kuwano-Yoshida, M. Nonaka, H. Sasaki, W. Ohfuchi

  Apr. 2012, Geophysical Research Letters, 39(8) (8)

  [Refereed]

  Scientific journal


• Effect of cloud's characteristics on climate: A one-dimensional radiative-convective equilibrium model study

  Wataru Ohfuchi, Ryohei Suzuki, Yusuke Chikaraishi, Ryuho Kataoka, Kanya Kusano, Yozo Hamano, Shigenori Maruyama

  Society of Exploration Geophysicists of Japan, Jan. 2011, Proceedings of the 10th SEGJ International Symposium, Kyoto, Japan, 20-22 November 2011, 1 - 4

  International conference proceedings


• CORRIGENDUM

  Takeaki Sampe, Hisashi Nakamura, Atsushi Goto, Wataru Ohfuchi

  Nov. 2010, Journal of Climate, 23(22) (22), 6128 - 6128

  Scientific journal


• An improved PDF cloud scheme for climate simulations

  Akira Kuwano-Yoshida, Takeshi Enomoto, Wataru Ohfuchi

  Jul. 2010, Quarterly Journal of the Royal Meteorological Society, 136(651) (651), 1583 - 1597, English

  [Refereed]

  Scientific journal


• Significance of a midlatitude SST frontal zone in the formation of a storm track and an eddy-driven westerly jet

  Takeaki Sampe, Hisashi Nakamura, Atsushi Goto, Wataru Ohfuchi

  Apr. 2010, Journal of Climate, 23(7) (7), 1793 - 1814, English

  [Refereed]

  Scientific journal


• The Earth Simulator Center

  Watanabe Kunihiko, Ohfuchi Wataru, Kageyama Akira, Takahashi Keiko, Araki Fumiaki, Kusano Kanya, Hirose Shigenobu, Sasaki Hideharu, Komori Nobumasa, Enomoto Takeshi, Kuwano-Yoshida Akira, Taguchi Bunmei, Hyodo Mamoru, Furuichi Mikito, Miyagoshi Takehiro, Onishi Ryo, Sugimura Takeshi, Baba Yuya, Kida Shin-ichiro, Kawahara Shintaro, Ohno Nobuaki, Kawano Akio, Sugiyama Toru, Shima Shin-ichiro, Hasegawa Hiroki, Kawamura Youji

  The operation of the Earth Simulator started in March, 2002, and 7 years have passed. For these years, the Earth Simulator has been used by not only researchers of JAMSTEC but also many researchers of the domestic and international institutions, and many remarkable results have been made. The Earth Simulator Center was established at the same time as the birth of the Earth Simulator. The researchers of the Earth Simulator Center have also developed new simulation technologies.
  The simulation is the only one method by which we can predict the future scientifically. Therefore, it has the important role in the science as well as the technology which can contribute to the life of the people, and has the important meaning in modeling the future of the human beings.

  Japan Agency for Marine-Earth Science and Technology, 2009, JAMSTEC Rep. Res. Dev., 9(1) (1), 1_75 - 1_135


• Relationship between high-impact weather events in Japan and propagation of Rossby waves along the Asian jet in July 2004

  Takeshi Enomoto, Hirokazu Endo, Yayoi Harada, Wataru Ohfuchi

  2009, Journal of the Meteorological Society of Japan, 87(1) (1), 139 - 156, English

  [Refereed]

  Scientific journal


• Mesoscale spectrum of atmospheric motions investigated in a very fine resolution global general circulation model

  Kevin Hamilton, Yoshiyuki O. Takahashi, Wataru Ohfuchi

  Sep. 2008, JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 113(D18) (D18), English

  [Refereed]

  Scientific journal


• Topographic effects on the solar semidiurnal surface tide simulated in a very fine resolution general circulation model

  Kevin Hamilton, Steven C. Ryan, Wataru Ohfuchi

  Sep. 2008, JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 113(D17) (D17), English

  [Refereed]

  Scientific journal


• On the importance of midlatitude oceanic frontal zones for the mean state and dominant variability in the tropospheric circulation

  Hisashi Nakamura, Takeaki Sampe, Atsushi Goto, Wataru Ohfuchi, Shang Ping Xie

  Aug. 2008, Geophysical Research Letters, 35(15) (15), English

  [Refereed]

  Scientific journal


• Deep ocean inertia-gravity waves simulated in a high-resolution global coupled atmosphere-ocean GCM

  Nobumasa Komori, Wataru Ohfuchi, Bunmei Taguchi, Hideharu Sasaki, Patrice Klein

  Feb. 2008, Geophysical Research Letters, 35(4) (4), English

  [Refereed]

  Scientific journal


• High-resolution simulation of the global coupled atmosphere-ocean system: Description and preliminary outcomes of CFES (CGCM for the Earth Simulator)

  Nobumasa Komori, Akira Kuwano-Yoshida, Takeshi Enomoto, Hideharu Sasaki, Wataru Ohfuchi

  2008, High Resolution Numerical Modelling of the Atmosphere and Ocean, 241 - 260

  [Refereed]

  In book


• Description of AFES 2: Improvements for high-resolution and coupled simulations

  Takeshi Enomoto, Akira Kuwano-Yoshida, Nobumasa Komori, Wataru Ohfuchi

  2008, High Resolution Numerical Modelling of the Atmosphere and Ocean, 77 - 97, English

  [Refereed]

  In book


• "Virtual" atmospheric and oceanic circulation in the Earth Simulator

  Wataru Ohfuchi, Hideharu Sasaki, Yukio Masumoto, Hisashi Nakamura

  Jun. 2007, BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY, 88(6) (6), 861 - +, English

  [Refereed]

  Scientific journal


• Remote effects of tropical storm Cristobal upon a cut-off cyclone over Europe in August 2002

  T. Enomoto, W. Ohfuchi, H. Nakamura, M. A. Shapiro

  Apr. 2007, METEOROLOGY AND ATMOSPHERIC PHYSICS, 96(1-2) (1-2), 29 - 42, English

  [Refereed]

  Scientific journal


• High-resolution weather forecast experiments on the earth simulator: Connections to aeronautics

  H. Nakamura, T. Miyoshi, T. Enomoto, S. Yamane, W. Ohfuchi

  2007, ICAS-Secretariat - 25th Congress of the International Council of the Aeronautical Sciences 2006, 7, 4664 - 4671

  [Refereed]

  International conference proceedings


• Explicit global simulation of the mesoscale spectrum of atmospheric motions

  Yoshiyuki O. Takahashi, Kevin Hamilton, Wataru Ohfuchi

  Jun. 2006, GEOPHYSICAL RESEARCH LETTERS, 33(12) (12), English

  [Refereed]

  Scientific journal


• High resolution simulations of atmospheric and oceanic circulation

  Kevin Hamilton, Wataru Ohfuchi

  American Geophysical Union, 2006, Eos, 87(18) (18), 176, English

  International conference proceedings


• Large atmospheric computation on the earth simulator: The LACES project.

  Michel Desgagné, Ron McTaggart-Cowan, Wataru Ohfuchi, Gilbert Brunet, Peter Yau, John Gyakum, Yuki Furukawa, Michel Valin

  2006, Scientific Programming, 14(1) (1), 13 - 25

  [Refereed]

  Scientific journal


• Effect of the thermal tidal oscillation of the atmosphere on tropical cyclones

  MK Yoshioka, Y Kurihara, W Ohfuchi

  Aug. 2005, GEOPHYSICAL RESEARCH LETTERS, 32(16) (16), L16802, English

  [Refereed]

  Scientific journal


• A resolution dependency of equatorial precipitation activities represented in a general circulation model

  YAMADA Yukiko, SAMPE Takeaki, TAKAHASHI Yoshiyuki O, YOSHIOKA Mayumi K, OHFUCHI Wataru, ISHIWATARI Masaki, NAKAJIMA Kensuke, HAYASHI Yoshi-Yuki

  An aqua planet experiment is performed to investigate the dependencies of the model representations of the equatorial precipitation activities on the horizontal and vertical resolution. The numerical model utilized is AFES, an AGCM optimized for the Earth Simulator. With the resolution of horizontal truncation at T39 and 48 vertical levels (referred to as the standard run), there appear precipitation disturbances of the scale of several grids, which are advected westward by the background wind. When the vertical resolution is increased to 96 levels from the standard run, precipitation tends to have weak intensity but be widely distributed, and the westward propagating grid-scale disturbances are rarely observed. When the horizontal resolution is increased to T319 from the standard run, a hierarchical structure appears. A large-scale eastward moving precipitation structure is superimposed on a small-scale westward moving structure.

  日本学術会議 「機械工学委員会・土木工学・建築学委員会合同IUTAM分科会」, Apr. 2005, NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan, 54(0) (0), 123 - 123


• Conservative semi-Lagrangian transport on a sphere and the impact on vapor advection in an atmospheric general circulation model

  Xindong Peng, Feng Xiao, Wataru Ohfuchi, Hiromitsu Fuchigami

  Mar. 2005, Monthly Weather Review, 133(3) (3), 504 - 520, English

  [Refereed]

  Scientific journal


• A Resolution Dependence of Equatorial Precipitation Activities Represented in a General Circulation Model

  YAMADA Yukiko, SAMPE Takeaki, TAKAHASHI Yoshiyuki O, YOSHIOKA Mayumi K, OHFUCHI Wataru, ISHIWATARI Masaki, NAKAJIMA Kensuke, HAYASHI Yoshi‐Yuki

  An aqua planet experiment is performed to investigate dependence of the model representation of the equatorial precipitation activities on horizontal and vertical resolution. The numerical model utilized is AFES, an AGCM optimized for the Earth Simulator. With a resolution of horizontal truncation at T39 and 48 vertical levels (referred to as the standard run), there appear precipitation disturbances of the scale of several grids, which are advected westward by the background wind. With the increase of the vertical resolution to 96 levels from the standard run, precipitation tends to have weak intensity but be widely distributed, and the westward propagating grid-scale disturbances are rarely observed. With the increase of the horizontal resolution to T159 from the standard run, a hierarchical structure appears. A large-scale eastward moving precipitation structure is superimposed on a small-scale westward moving structure.

  日本学術会議 「機械工学委員会・土木工学・建築学委員会合同IUTAM分科会」, 2005, Theor Appl Mech Jpn, 54(0) (0), 289 - 297, English


• 10-km Mesh Meso-scale Resolving Simulations of the Global Atmosphere on the Earth Simulator – Preliminary Outcomes of AFES (AGCM for the Earth Simulator) –

  Wataru Ohfuchi, Hisashi Nakamura, Mayumi K. Yoshioka, Takeshi Enomoto, Koutarou Takaya, Xindong Peng, Shozo Yamane, Teruyuki Nishimura, Yoshio Kurihara, Kozo Ninomiya

  Lead, Apr. 2004, Journal of the Earth Simulator, 1, 8 - 34, English

  [Refereed]

  Scientific journal


• Large-scale interaction among storm tracks, polar-frontjets and midlatitude oceanic fronts

  Hisashi Nakamura, Takeaki Sampe, Youichi Tanimoto, Akihiko Shimpo, Wataru Ohfuchi, Shang-Ping Xie

  2004, 13th Conference on Interactions of the Sea and Atmosphere, 115 - 125, English

  International conference proceedings


• Polar low genesis over the east coast of the Asian Continent simulated in an AGCM

  Kozo Ninomiya, Teruyuki Nishimura, Tuneaki Suzuki, Shinji Matsumura, Wataru Ohfuchi

  Aug. 2003, Journal of the Meteorological Society of Japan, 81(4) (4), 697 - 712, English

  [Refereed]

  Scientific journal


• Performance of atmospheric general circulation model using the spectral transform method on the earth simulator

  S Shingu, H Fuchigami, M Yamada, Y Tsuda, M Yoshioka, W Ohfuchi, H Nakamura, M Yokokawa

  2003, PARALLEL COMPUTATIONAL FLUID DYNAMICS: NEW FRONTIERS AND MULTI-DISCIPLINARY APPLICATIONS, PROCEEDINGS, 79 - 86, English

  [Refereed]

  International conference proceedings


• Dependence of the parallel performance of the atmospheric general circulation model for the earth simulator on problem size

  W Ohfuchi, S Shingu, H Fuchigami, M Yamada

  Jan. 2003, NEC RESEARCH & DEVELOPMENT, 44(1) (1), 99 - 103, English

  Scientific journal


• 10-KM mesh global atmospheric simulations

  W Ohfuchi, T Enomoto, K Takaya, MK Yoshioka

  2003, REALIZING TERACOMPUTING, 47 - 57, English

  International conference proceedings


• Features of the Baiu front simulated in an AGCM (T42L52)

  Kozo Ninomiya, Teruyuki Nishimura, Wataru Ohfuchi, Tuneaki Suzuki, Shinji Matsumura

  Aug. 2002, Journal of the Meteorological Society of Japan, 80(4) (4), 697 - 716, English

  [Refereed]

  Scientific journal


• A 26.58 Tflops global atmospheric simulation with the spectral transform method on the Earth Simulator.

  Satoru Shingu, Hiroshi Takahara, Hiromitsu Fuchigami, Masayuki Yamada, Yoshinori Tsuda, Wataru Ohfuchi, Yuji Sasaki, Kazuo Kobayashi, Takashi Hagiwara, Shinichi Habata, Mitsuo Yokokawa, Hiroyuki Itoh, Kiyoshi Otsuka

  IEEE Computer Society, 2002, Proceedings of the 2002 ACM/IEEE conference on Supercomputing(SC), 59 - 19

  [Refereed]

  International conference proceedings

• タイタン大気シミュレーションに見られる波動と赤道超回転生成

  墨 幹, 竹広 真一, 大淵 済, 野村 英子, 藤井 友香

  Jun. 2024, 非線形波動現象の数理と応用（数理解析研究所講究録）, 2286, 124 - 136

  Report research institution


• An SIR model simulation study on effect of vaccination speed

  Kei KUMAGAI, Kaito SASAKI, Kensei ASANO, Sakuya TANIZAWA, Jumpei YAMANAKA, Wataru OHFUCHI

  Last, Mar. 2022, 大阪物療大学紀要, 10, 17 - 26, Japanese

  Report research institution


• Road to the first star : Venus orbiter from Japan (36) ― Numerical simulations and data assimilations with AFES-Venus ―

  Kashimura H., Sugimoto N., Takagi M., Ando H., Imamura T., Matsuda Y., Enomoto T., Ohfuchi W., Hashimoto G. L., Ishiwatari M., Nakajima K., Takahashi Y. O., Hayashi Y.

  金星大気の全球的な流れを計算する数値モデル「AFES-Venus」とそれを用いた数値実験・データ同化について紹介する．AFES-Venusは，金星大気の惑星規模筋状構造や周極低温域，大気安定度の地方時依存性などの再現に成功している．AFES-Venusでは，高度55 km付近に低安定度層を導入したことと，空間解像度を高めたことによって，傾圧不安定の発達が計算されるようになった．数値実験により，傾圧不安定の発達が，金星大気の現実的な風速・温度場の再現にとって重要であることが分かってきた．また我々は，AFES-Venusを用いたデータ同化システムも開発しており，「あかつき」による観測を反映した現実的かつ時空間的に偏りのない金星大気のデータセットの創出や，個々の観測の重要度評価による観測計画立案への貢献も目指している．

  The Japanese Society for Planetary Sciences, 25 Dec. 2018, Planetary People - The Japanese Society for Planetary Sciences, 27(4) (4), 314 - 319, Japanese


• Numerical study on small scale vortices in Mars's lower atmosphere

  Kensuke Nakajima, Seiya Nishizawa, Masatsugu Odaka, Yoshiyuki O.Takahashi, Wataru Ohfuchi, Ko-ichiro Sugiyama, Masaki Ishiwatari, Shin-ichi Takehiro, Hisashi Yashiro, Yousuke Sato, Hirofumi Tomita, Yoshi-Yuki Hayashi

  Mar. 2018, Fundamental Aspects of Geophysical Turbulence III


• Understanding Roles of Oceanic Fine Structures in Climate and Its Variability(4)

  大淵 済, 佐々木 英治, 田口 文明

  Earth Simulator Center, Japan Agency for Marine-Earth Science and Technology, Apr. 2013, Annual report of the Earth Simulator Center, 11 - 16, English


• Simplified Ensemble-Based Forecast Sensitivity Analysis

  榎本 剛, 山根 省三, 大淵 済

  京都大学防災研究所, 2013, 京都大学防災研究所年報, (57) (57), 163 - 168, Japanese


• THE APE ATLAS, NCAR Technical NoteNCAR/TN-484+STR

  D. L. Williamson, M. Blackburn, B. J. Hoskins, K. Nakajima, W.Ohfuchi, Y. O. Takahashi, Y.-Y. Hayashi, H. Nakamura, M. Ishiwatari, J.L. McGregor, H. Borth, V. Wirth, H. Frank, P. Bechtold, N. P. Wedi, H.Tomita, M. Satoh, M. Zhao, I. M. Held, M. J. Suarez, M.-I. Lee, M.Watanabe, M. Kimoto, Y. Liu, Z. Wang, A. Molod, K. Rajendran, A. KitohR. Stratton

  Nov. 2012, National Center for Atmospheric Research, English


• Space and Earth System Modeling

  草野 完也, 大淵 済, 島 伸一郎

  Earth Simulator Center, Japan Agency for Marine-Earth Science and Technology, Apr. 2012, Annual report of the Earth Simulator Center, 105 - 109, English


• Understanding Roles of Oceanic Fine Structures in Climate and Its Variability(3)

  大淵 済, 佐々木 英治, 田口 文明

  Earth Simulator Center, Japan Agency for Marine-Earth Science and Technology, Apr. 2012, Annual report of the Earth Simulator Center, 11 - 17, English


• An Introduction of CFES, a Coupled Atmosphere-Ocean General Circulation Model(Fluid Flow Phenomena in Earth Science Part 2: The Surface of the Earth)

  OHFUCHI Wataru, KOMORI Nobumasa, Taguchi Bunmei, Kuwano-Yoshida Akira

  日本流体力学会, Oct. 2011, Journal of Japan Society of Fluid Mechanics, 30(5) (5), 369 - 375, Japanese

  [Invited]

  Introduction scientific journal


• High resolution general circulation model experiments of the Martian atmosphere: Resolution dependence of disturbance and surface stress

  Takahashi, Y. O, Y.-Y. Hayashi, M. Odaka, W. Ohfuch

  2011, Abstracts of Forth International Workshop on the Mars Atmosphere: Modeling and Observations (http://www-mars.lmd.jussieu.fr/paris2011/abstracts/takahashi1_paris2011.pdf)


• Dynamical downscaling of global reanalysis

  Kanamitsu, M, H. Kanamaru, K. Yoshimura, Y. Cui, H. Juang, W. Ohfuchi

  2008, Extended Abstracts of Third WPRC International Conference on Reanalysis (http://wcrp.ipsl.jussieu.fr/Workshops/Reanalysis2008/Documents/V2-231_ea.pdf)


• Reproducibility of precipitation variability over the Gulf of Guinea and the western Sahel associated with “realistic” subsurface soil moisture prescription

  Yamada, T. J, S. Kanae, T. Oki, Y. Hirabayashi, T. Enomoto, A. Kuwano-Yoshida, N. Komori, W. Ohfuchi

  2008, Extended Abstracts of Third WPRC International Conference on Reanalysis (http://wcrp.ipsl.jussieu.fr/Workshops/Reanalysis2008/Documents/Posters/P2-21_ea.pdf)


• Understanding and forecasting high-impact phenomena in the atmosphere and ocean

  Hideharu Sasaki, Takeshi Enomoto, Nobumasa Komori, Akira Kuwano-Yoshida, Kazuhisa Tsuboki, Jun Inoue, Bunmei Taguchi, Wataru Ohfuchi

  2008, Annual Report of the Earth Simulator Center April 2008--September 2008, 23 - 28, English


• Introduction

  Wataru Ohfuchi, Kevin Hamilton

  2008, High Resolution Numerical Modelling of the Atmosphere and Ocean, 1 - 6

  Others


• 地球シミュレータ・プロジェクト--現場報告 (次世代への架け橋--今、プロジェクトリーダーが語る--日本気象学会創立125周年特別号第2部)

  大淵 済

  日本気象学会, Oct. 2007, 気象研究ノ-ト, (215) (215), 43 - 52, Japanese


• Virtual Atmosphere and Ocean on the Earth Simulator

  Takeshi ENOMOTO, Wataru OHFUCHI

  日本気象学会, 31 Jan. 2007, 天気 = Tenki, 54(1) (1), 13 - 16, Japanese


• High-resolution simulations of the Martian atmosphere with a general circulation model

  Takahashi, Y. O, Y.-Y. Hayashi, M. Odaka, W. Ohfuchi

  2006, Abstracts of 2nd Mars Atmosphere Modeling of Observations Workshop, February27–March 3, 2006, Granada, Spain. 4 pp., http://www-mars.lmd.jussieu.fr/granada2006/abstracts/Takahashi_Granada2006.pdf


• High-resolution simulation studies on the mechanisms and predictability of various atmospheric and oceanic phenomena

  Wataru Ohfuchi, Takeshi Enomoto, Munehiko Yamaguchi, Nobumasa Komori, Hideharu Sasaki, Yoshikazu Sasai, Yoshio Masuda

  2006, Annual Report of the Earth Simulator Center April 2004--March 2005, 51 - 56, English


• 2005年度春季大会専門分科会報告

  山崎 信雄, 吉崎 正憲, 榎本 剛, 大淵 済, 中澤 哲夫, 余田 成男, 馬淵 和雄, 上野 充, 大畑 哲夫, 山崎 孝治

  日本気象学会, 31 Jul. 2005, 天気, 52(7) (7), 559 - 564, Japanese


• 成果論文 地球シミュレータの応用成果 (スーパーコンピュータSX-8特集)

  陰山 聡, 大淵 済, 草野 完也

  日本電気, Jul. 2005, NEC技報, 58(4) (4), 58 - 65, Japanese


• Knowledge necessary to improve medium-range weather forecast and future perspective : A report on the First Meeting of Japan Working Group on THORPEX Research

  OHFUCHI Wataru, ENOMOTO Takeshi

  日本気象学会, 2005, 天気, 52(11) (11), 885 - 889, Japanese


• Report of "International Conference on Mesoscale Convective Systems and Heavy Rainfall in East Asia (ICMCS-IV)"

  YOSHIZAKI Masanori, UYEDA Hiroshi, YAMADA Hiroyuki, TSUBOKI Kazuhisa, REDDY K. Krishna, GENG Biao, OHFUCHI Wataru, KATO Teruyuki

  日本気象学会, 2005, 天気, 52(5) (5), 363 - 368, Japanese


• 3. 顕著現象の予測可能性(2005年度春季大会専門分科会報告)

  榎本 剛, 大淵 済, 中澤 哲夫, 余田 成男

  2005, 天気, 52(7) (7), 560 - 561, Japanese


• Toward Eddy-resolving Global Ocean Simulations on the Earth Simulator

  SASAKI Hideharu, SASAI Yoshikazu, MASUMOTO Yukio, OHFUCHI Wataru, Hideharu Sasaki, Yoshikazu Sasai, Yukio Masumoto, Wataru Ohfuchi, Earth Simulator Center Japan Agency for Marine-Earth Science and Technology, Frontier Research Center for Global Change Japan Agency for Marine-Earth Science and Technology, Frontier Research Center for Global Change Japan Agency for Marine-Earth Science and Technology, Earth Simulator Center Japan Agency for Marine-Earth Science and Technology

  2002年3月に,世界最速の40 Tflopsのピーク計算性能を持つ地球シミュレータが稼働を開始した。このことにより,随分先の事と想像されていた数十年から百年規模の全球渦解像海洋シミュレーションが比較的短時間で行なえるようになっている。全球渦解像シミュレーション時代の幕開けとも言えよう。そこで,地球シミュレータの概要と地球シミュレータ上で行っている渦解像海洋シミュレーションについて紹介する。The Earth Simulator (ES) with 40 Tflops peak performance, which is currently the fastest massive parallel computer for general purpose, began operation in March 2002. The ES provides opportunities to execute several decadal or hundreds-year integrations of the eddy-resolving global ocean simulations. In other words, an era of multi-year global simulations using the eddy-resolving ocean model has started. In this paper, the overviews of the ES and a series of our eddy-resolving global simulations using the ES are introduced. Our first attempt of eddy-resolving global simulations was a 50-year spin-up run driven by climatological forcing. The run simulated the mean state of oceanic fields and the eddy activities very realistically. Following the 50-year spin-up run, we executed a hindcast run from 1950 to 2003 and a tracer run incorporated with chlorofluorocarbons (CFCs). Our preliminary analysis of the hindcast run shows that the amplitude and phase of the simulated interannual variabilities such as El Nino and Indian Ocean Dipole coincide well with the oceanographic observations. Also, our tracer run captured the observed CFC-11 distribution in the South Atlantic very well, especially in the deep layer. Our realistic results seem to owe much to the realistic model bottom topography and the improved ocean circulation due to the ultra-high-resolution of our model. Our research task team is now expanding collaborative researches with external research groups and individuals, and planning to open the results of our eddy-resolving simulations to the research communitv under certain conditions.

  日本海洋学会, 05 Nov. 2004, Oceanography in Japan, 13(6) (6), 583 - 588, Japanese


• Huge ensemble hindcasts on the Earth Simulator: A case study

  Ohfuchi, W, S. Yamane, T. Enomoto, A. Yoshida, H. Nakamura

  2004, Proc. of the First THORPEX International Science Symposium, 6-10 December 2004, Montréal, Canada, World Meteorological Organization


• 1. ESとAFESの概要説明(第23回メソ気象研究会の報告「メソ気象研究における地球シミュレータの意義」)

  大淵 済

  2004, 天気, 51(2) (2), 141 - 143, Japanese


• 4. AFESで再現された低気圧の下流発達(第23回メソ気象研究会の報告「メソ気象研究における地球シミュレータの意義」)

  榎本 剛, 大淵 済, 中村 尚, Shapiro Melvyn A.

  2004, 天気, 51(2) (2), 145 - 146, Japanese


• Meso-scale resolving simulations of the global atmosphere and ocean on the Earth Simulator.

  OHFUCHI Wataru, NAKAMURA Hisashi, MASUMOTO Yukio, SASAKI Hideharu

  日本気象学会, 2004, 天気, 51(10) (10), 759 - 763, Japanese


• Toward Eddy-resolving Global Ocean Simulations on the Earth Simulator

  Sasaki Hideharu, Sasai Yoshikazu, Masumoto Yukio, Ohfuchi Wataru

  The Earth Simulator (ES) with 40 Tflops peak performance, which is currently the fastest massive parallel computer for general purpose, began operation in March 2002. The ES provides opportunities to execute several decadal or hundreds-year integrations of the eddy-resolving global ocean simulations. In other words, an era of multi-year global simulations using the eddy-resolving ocean model has started. In this paper, the overviews of the ES and a series of our eddy-resolving global simulations using the ES are introduced. Our first attempt of eddy-resolving global simulations was a 50-year spin-up run driven by climatological forcing. The run simulated the mean state of oceanic fields and the eddy activities very realistically. Following the 50-year spin-up run, we executed a hindcast run from 1950 to 2003 and a tracer run incorporated with chlorofluorocarbons (CFCs). Our preliminary analysis of the hindcast run shows that the amplitude and phase of the simulated interannual variabilities such as El Nino and Indian Ocean Dipole coincide well with the oceanographic observations. Also, our tracer run captured the observed CFC-11 distribution in the South Atlantic very well, especially in the deep layer. Our realistic results seem to owe much to the realistic model bottom topography and the improved ocean circulation due to the ultra-high-resolution of our model. Our research task team is now expanding collaborative researches with external research groups and individuals, and planning to open the results of our eddy-resolving simulations to the research communitv under certain conditions.

  The Oceanographic Society of Japan, 2004, Journal of the Oceanographical Society of Japan, 13(6) (6), 583 - 588, Japanese


• Mechanism and predictability of atmospheric and oceanic variations induced by interactions between large-scale field and meso-scale phenomena

  OHFUCHI W.

  The Earth Simulator Center, Japan Agency for Marine-Earth Science and Technology, 2004, Annual Report of the Earth Simulator Center, 2003, 57 - 61


• High-resolution global simulations of high-impact weather

  Takeshi Enomoto, Wataru Ohfuchi, Hisashi Nakamura, Melvyn A. Shapiro

  2004, Proc. First THORPEX International Science Symposium


• Simulation of high-impact weather on the Earth Simulator

  Takeshi Enomoto, Wataru Ohfuchi, Hishashi Nakamura, Melvyn A. Shapiro

  2004, Proc. International Symposium on Monitoring, Prediction and Mitigation of Disasters by Satellite Remote Sensing, 15 - 22, English


• Simulations of the August 2002 floods in central Europe

  Takeshi Enomoto, Wataru Ohfuchi, Hisashi Nakamura, Melvyn A. Shapiro

  2004, Proc. the International conference on high-impact weather and climate, 62 - 65


• Polar low genesis over the northwestern Pacific simulated in an AGCM

  Ninomiya, K, T. Nishimura, T. Suzuki, S. Matsumura, W. Ohfuchi

  2003, Proceedings of the International Conference on Mesoscale Convective Systems and Heavy Rainfall/Snowfall in East Asia, October 29–31, 2002, Tokyo, 511 - 516


• Simulations of global to regional phenomena using a 10-km mesh AGCM on the Earth Simulator

  Enomoto, T, W. Ohfuchi, S. Shingu, H. Nakamura, M. Yoshioka, K. Takaya, S. Yamane, T. Nishimura, X. Peng, H. Fuchigami, M. Yamada, Y. Kurihara, K. Ninomiya

  2003, Proceedings of the International Workshop on NWP Models for Heavy Precipitation in Asia and Pacific Areas, February 4–6, 2003, Tokyo, Japan,, 165 - 171


• 外部強制に伴う季節予測可能性について

  山根省三, 本田明治, 中村 尚, 大淵 済

  2003, グロースベッター, 41, 39 - 50

  Summary national conference


• Super-high-resolution climate simulations with an atmospheric ganeral circulation model

  OHFUCHI W.

  The Earth Simulator Center, Japan Marine Science and Technology Center, 2003, Annual Report of the Earth Simulator Center, 2002, 61 - 65


• Simulation of the Baiu/Meiyu frontal zone using a global 10-km mesh atmospheric model

  Takeshi Enomoto, Wataru Ohfuchi, Kozo Ninomiya

  2003, Proc. the 2nd Workshop on Regional Climate Modeling for Monsoon SystemYokohama (Japan), GAME Publication, 39, 141 - 146, English

  [Refereed]


• Seesaw between the Aleutian and Icelandic lows

  Nakamura, H, M. Honda, S. Yamane, W. Ohfuchi

  日本気象学会, 31 Aug. 2002, Tenki, 49(8) (8), 701 - 709, Japanese


• Interview 研究者に聞く 大淵済研究員(地球シミュレータセンター 計算地球科学研究領域大気海洋シミュレーショングループ)

  大淵 済

  海洋科学技術センター横浜研究所情報業務部, May 2002, Blue earth, 14(3) (3), 18 - 21, Japanese


• 観測データと数値実験に見られる冬季北半球循環場に卓越する変動の10年規模の変調について―アリューシャン・アイスランド低気圧のシーソー現象に着目して

  山根省三, 中村 尚, 本田明治, 大淵 済

  2002, グロースベッター, 40, 88 - 97


• (Report on Second International Conference on Reanalyses. )

  Ohfuchi Wataru

  2000, 天気, 47(4) (4), 272 - 273, Japanese


• The sensitivity of an atmospheric general circulation model to large changes in carbon dioxide level

  OHFUCHI W.

  1994, Ph. D. thesis, Princeton University, 131

• High resolution numerical modelling of the atmosphere and ocean

  Hamilton, Kevin, Ohfuchi, Wataru

  Joint editor, Springer, Jan. 2008, English, ISBN: 9780387366715


• 次世代への架け橋 -今、プロジェクトリーダーが語る- (気象研究ノート 第215号 日本気象学会創立125周年特別号第2部：気象研究ノート編集委員会編)

  大淵 済

  Contributor, 地球シミュレータ・プロジェクト：現場報告（第3章：pp.43–52）, 日本気象学会, Oct. 2007, Japanese, ISBN: 4990238389


• 北極振動 (気象研究ノート 206: 山崎 孝治編)

  本田明治, 中村 尚, 山根省三, 大淵 済

  Contributor, シーソー現象に見られる20年規模変調（セクション8-2, pp.145–158）, 日本気象学会, Jul. 2004, Japanese, ISBN: 4946443894


• 気候変動 : 多角的視点から

  Burroughs, William James, 松野, 太郎, 大淵, 済, 谷本, 陽一, 向川, 均

  Joint translation, 第4章「気候変動の証拠」，第5章「気候変動の結果」，第6章「気候変動の測定」, シュプリンガー・フェアラーク東京, Dec. 2003, Japanese, ISBN: 9784431710592


• 環境用語事典（横山, 長之;市川, 惇信編）

  大淵 済

  Contributor, 「温室効果」，「気候感度」，「気候変動」，「気候モデル」，「子午面循環」，「自然的変動」，「全球平均気温」，「二酸化炭素漸増実験」，「二酸化炭素倍増実験」，「パラメタリゼーション」，「フィードバック」，「放射対流平衡」, オーム社, May 1997, Japanese, ISBN: 427402346X

• Research founded by Dr. Yoshiyuki Takahashi during his JAMSTEC/ESC era

  Wataru Ohfuchi

  Special Session of the Planetary Atmosphere Workshop — In Memory of Yoshiyuki Takahashi — "Development and Application of Planetary Atmosphere Models", Mar. 2026, Japanese

  [Invited]

  Public discourse


• A study on Dr. Ukichiro Nakaya's doctoral dissertation

  Wataru Ohfuchi

  GFD Seminar, Mar. 2026, Japanese

  Public discourse


• How should we adjust the horizontal diffusion coefficient when the resolution of an atmospheric general circulation model is changed?: Follow-up

  Wataru Ohfuchi, Takahiro Iwayama, Shin-ichi Takehiro

  GFD Seminar, Mar. 2026, Japanese

  Public discourse


• A messy story about the dissipation of the atmospheric general circulation

  Wataru Ohfuchi

  The Third CPS Salon Quasi-monthly Meeting, Jul. 2025, Japanese

  Public discourse


• The adjustment of the horizontal diffusion coefficient to changes in the resolution of a general circulation model of the atmosphere

  Wataru Ohfuchi, Takahiro Iwayama

  Japan Geoscience Union Meeting 2025, May 2025, Japanese

  Poster presentation


• How should we adjust the horizontal diffusion coefficient when the resolution of an atmospheric general circulation model is changed?

  Wataru Ohfuchi, Takahiro Iwayama

  GFD Seminar, Mar. 2025, Japanese


• HPC and spectral models

  Wataru Ohfuchi

  Department of Earth System Science, Faculty of Science, Fukuoka University seminar, Feb. 2025, Japanese


• Toward a better understanding of the kinetic energy dissipation of atmospheric general circulation

  Wataru Ohfuchi

  Workshop on planetary atmospheric computation, Nov. 2024, Japanese


• Held and Suarez (1994) revisited

  Wataru Ohfuchi

  Atmospheric Seminar (Fluid Geophysics Research Group, Department of Planetology, Kobe University), Jun. 2024, Japanese


• Study of the superrotation of Titan's stratosphere using a general circulation model with simple radiative processes

  Sumi, M, Takehiro, S, Ohfuchi, W, Nomura, H, Fujii, Y

  Workshop on Venus and other related atmosphere, Mar. 2024, English

  Oral presentation


• 全球気象シミュレーションに 関する考察 ー 20年前，10年前，現在，そして，ポスト「富岳」に向けて ー

  大淵 済

  京都大学防災研究所 災害気候研究分野 セミナー, Dec. 2023

  Public discourse


• タイタン大気の成層圏超回転に対するヘイズ層の影響

  墨 幹, 竹広 真一, 大淵 済, 野村 英子, 藤井 友香

  日本気象学会 2023 年度秋季大会, Oct. 2023, Japanese

  Oral presentation


• タイタン大気シミュレーションに見られる波動と赤道超回転生成

  墨 幹, 竹広 真一, 大淵 済, 野村 英子, 藤井 友香

  RIMS 共同研究(公開型)「非線形波動現象の数理とその応用」, Oct. 2023, Japanese

  Oral presentation


• ヘイズ層での放射加熱により生成されるタイタン成層圏の超回転

  墨 幹, 竹広 真一, 大淵 済, 野村 英子, 藤井 友香

  2023 年日本流体力学会年会., Sep. 2023, Japanese

  Oral presentation


• タイタン大気の成層圏超回転に対するヘイズ層の影響

  墨 幹, 竹広真一, 大淵 済, 野村英子, 藤井友香

  日本流体力学会 年会 オンライン開催, Sep. 2021


• Kaspi, Y and A. P. Showman, 2015: Atmospheric dynamics of terrestrial exoplanets over a wide range of orbital and atmospheric parameters. Ap. J. 804, 60 (18 pp.)の紹介：地球型惑星の大気力学パラメータ・スイープ実験について

  大淵 済

  第 113 回惑星大気研究会 (WTK), オンライン, Apr. 2021


• タイタンの成層圏超回転へのヘイズ層の影響

  墨 幹, 竹広真一, 大淵 済, 野村英子, 藤井友香

  日本惑星科学会 2020年秋季講演会 オンライン開催, Nov. 2020


• タイタンの大気力学に対するヘイズ層の放射パラメータ依存性

  墨 幹, 竹広真一, 大淵 済, 野村英子, 藤井友香

  JpGU-AGU Joint Meeting 2020 オンライン開催, Jul. 2020


• 高解像度金星大気シミュレーションで再現された惑星規模筋状構造

  樫村 博基, 杉本 憲彦, 高木 征弘, 松田 佳久, 大淵 済, 榎本 剛, 中島 健介, 石渡 正樹, 佐藤 隆雄, はしもと じょーじ, 佐藤 毅彦, 高橋 芳幸, 林 祥介

  日本流体力学会 年会2019 調布市, Sep. 2019


• Planetary-scale streak structure reproduced in high-resolution simulations of the Venus atmosphere with a low-stability layer

  Kashimura, H, N. Sugimoto, M. Takagi, Y. Matsuda, W. Ohfuchi, T. Enomoto, K. Nakajima, M. Ishiwatari, T. M. Sato, G. L. Hashimoto, T. Satoh, Y. O. Takahashi, Y.-Y. Hayashi

  International Venus Conference 2019/The 74th Fujihara Seminar: "Akatsuki" Novel Development of Venus Science, Niseko, Japan, May 2019


• Dynamics of Martian atmosphere unresolved by general circulation models ~Mesoscale and microscale eddies~

  Nakajima, K, S. Nishizawa, M. Odaka, Y. O. Takahashi, W. Ohfuchi, K.. Sugiyama, M. Ishiwatari, S Takehiro, H. Yashiro, Y. Sato, H. Tomita, Y.-Y. Hayashi

  RIMS Gasshuku Seminar 2019 for Data assimilation, Kyoto, Mar. 2019


• 高解像度火星大気大循環モデル中の中小規模渦度擾乱

  中島健介, 高橋芳幸, 樫村博基, 大淵 済, 石渡正樹, 竹広真一, 林 祥介

  日本気象学会2018年度秋季大会 仙台, Oct. 2018


• Modeling of streak structure observed by Akastuski

  Kashimura, H, N. Sugimoto, M. Takagi, Y. Matsuda, W. Ohfuchi, T. Enomoto, K. Nakajima, T. M. Sato, G. L. Hashimoto, T. Satoh, Y. O. Takahashi, Y.-Y. Hayashi

  CPS/WTK Mini-Workshop on Planetary Atmospheres II, Kobe, Mar. 2018


• Disturbances and energy spectra in a high-resolution global model of the Venus atmosphere

  Kashimura, H, N. Sugimoto, M. Takagi, H. Ando, Y. Matsuda, W. Ohfuchi, T. Enomoto, M. Ishiwatari, K. Nakajima, G. L. Hashimoto, Y. O. Takahashi, Y.-Y. Hayashi, AFES-planets group

  Fundamental Aspects of Geophysical Turbulence III, Nagoya, Mar. 2018


• Numerical study on small scale vortices in Mars's lower atmosphere

  Nakajima, K, S. Nishizawa, M. Odaka, Y. O. Takahashi, W. Ohfuchi, K.. Sugiyama, M. Ishiwatari, S Takehiro, H. Yashiro, Y. Sato, H. Tomita, Y.-Y. Hayashi

  Fundamental Aspects of Geophysical Turbulence III, Nagoya, Mar. 2018


• 高解像度金星大気シミュレーションで再現された惑星規模のストリーク構造

  樫村博基, 杉本憲彦, 高木征弘, 松田佳久, 大淵 済, 榎本 剛, 中島健介, 石渡正樹, 佐藤隆雄, はしもとじょーじ, 佐藤毅彦, 高橋芳幸, 林 祥介

  第142回地球電磁気・地球惑星圏学会総会・講演会, 宇治, Oct. 2017


• AFES-Venus による金星大気のモデリング

  高木征弘, 杉本憲彦, 安藤紘基, 樫村博基, 松田佳久, 榎本 剛, 中島健介, 石渡正樹, 小高正嗣, はしもとじょーじ, 大淵 済, 高橋芳幸, 林 祥介

  日本気象学会2017年度秋季大会. 札幌, Oct. 2017

  [Invited]


• 高解像度金星大気シミュレーションで再現された惑星規模のストリーク構造

  樫村博基, 杉本憲彦, 高木征弘, 松田佳久, 大淵 済, 榎本 剛, 中島健介, 石渡正樹, 佐藤隆雄, はしもとじょーじ, 佐藤毅彦, 高橋芳幸, 林 祥介

  日本気象学会2017年度秋季大会, 札幌, Oct. 2017


• Planetary-scale streak structures produced in a high-resolution simulation of Venus atmosphere

  Kashimura, H, N. Sugimoto, M. Takagi, Y. Matsuda, W. Ohfuchi, T. Enomoto, K. Nakajima, M. Ishiwatari, T. M. Sato, G. L. Hashimoto, T. Satoh, Y. O. Takahashi, Y.-Y. Hayashi

  European Planetary Science Congress 2017, Riga, Latvia, Sep. 2017


• 高解像度金星大気シミュレーションで再現された惑星規模のストリーク構造

  樫村博基, 杉本憲彦, 高木征弘, 松田佳久, 大淵 済, 榎本 剛, 中島健介, 石渡正樹, 佐藤隆雄, はしもとじょーじ, 佐藤毅彦, 高橋芳幸, 林 祥介

  日本惑星科学会2017年秋季講演会, 豊中, Sep. 2017


• Planetary-scale streak structures produced in a high-resolution simulation of Venus atmosphere

  Kashimura, H, N. Sugimoto, M. Takagi, Y. Matsuda, W. Ohfuchi, T. Enomoto, K. Nakajima, M. Ishiwatari, T. M. Sato, G. L. Hashimoto, T. Satoh, Y. O. Takahashi, Y.-Y. Hayashi

  JpGU-AGU joint meeting 2017, Chiba, Japan, May 2017

  [Invited]


• “ウォーカー循環” 再考：水惑星熱源応答実験からの示唆

  中島健介, 神田雅浩, 高谷康太郎, 石渡正樹, 大淵 済, 高橋芳幸, 林 祥介

  日本気象学会2017年度春季大会, 渋谷区, May 2017


• Aqua-planet experiment (APE) review

  Nakajima, K, Y. Yamada, M. Ishiwatari, W. Ohfuchi, Y. O. Takahashi, and, Y.-Y. Hayashi

  WTK Aquaplanet Workshop, Mitaka, Japan, Feb. 2017


• 簡易金星版 AFES 高解像度計算における運動エネルギースペクトル解析

  樫村博基, 杉本憲彦, 高木征弘, 松田佳久, 大淵 済, 榎本 剛, 中島健介, 高橋芳幸, 林 祥介

  第30回大気圏シンポジウム, 相模原, Dec. 2016


• 簡易金星版 AFES 高解像度計算におけるエネルギースペクトルの鉛直分布

  樫村博基, 杉本憲彦, 高木征弘, 大淵 済, 榎本 剛, 高橋芳幸, 林 祥介

  日本気象学会2016年度秋季大会, 名古屋, Oct. 2016


• 金星GCM(AFES)で再現された小規模擾乱の解析

  杉本憲彦, 高木征弘, 安藤紘基, 樫村博基, 今村 剛, 松田佳久, 大淵 済, 榎本 剛, 高橋芳幸, 林 祥介

  日本地球惑星科学連合2016年大会, 千葉, May 2016


• Waves reproduced by AFES for Venus (金星AFESで再現された波)

  杉本憲彦, 樫村博基, 高木征弘, 松田佳久, 安藤紘基, 今村 剛, 志水達也, 大淵 済, 榎本 剛, 高橋芳幸, 林 祥介

  惑星大気研究連絡会, 京都産業大学むすびわざ館, 京都, Oct. 2015

  [Invited]


• Simulation of Venusian atmosphere by AFES (Atmospheric general circulation model For the Earth Simulator)

  Sugimoto, N, H. Kashimura, M. Takagi, Y. Matsuda, H. Ando, T. Imamura, W. Ohfuchi, T. Enomoto, Y.O. Takahashi, Y.-Y. Hayashi

  European Planetary Science Congress 2015, Nantes, France, Sep. 2015


• C315 簡易金星版AFES高解像度計算における運動エネルギーの波数間収支(「あかつき」金星大気探査カウントダウン,スペシャル・セッション)

  樫村 博基, 杉本 憲彦, 高木 征弘, 大淵 済, 榎本 剛, 高橋 芳幸, 林 祥介

  大会講演予講集, 2015, Japanese, 日本気象学会


• D451 簡易金星版AFES高解像度計算のエネルギースペクトル(大気力学,一般口頭発表)

  樫村 博基, 杉本 憲彦, 高木 征弘, 大淵 済, 榎本 剛, 高橋 芳幸, 林 祥介

  大会講演予講集, 2014, Japanese, 日本気象学会


• D103 高解像度火星大気大循環モデルで表現される小規模擾乱によるダスト巻き上げ過程への影響(惑星大気,一般口頭発表)

  高橋 芳幸, 林 祥介, 小高 正嗣, 大淵 済

  大会講演予講集, 2011, Japanese, 日本気象学会


• A303 Emanuel対流スキームへの可変エントレインメント率の適用(気候システムII,口頭発表)

  吉田 聡, 榎本 剛, 大淵 済

  大会講演予講集, Sep. 2010, Japanese


• B306 大気海洋結合モデルにおける中緯度海面水温前線域での結合係数(中高緯度大気,口頭発表)

  小守 信正, 田口 文明, 吉田 聡, 野中 正見, 高谷 康太郎, 大淵 済, 中村 尚

  大会講演予講集, 2010, Japanese, 日本気象学会


• P179 CFESによる高解像度大気海洋結合シミュレーション(IV)

  小守 信正, 田口 文明, 吉田 聡, 佐々木 英治, 榎本 剛, 野中 正見, 笹井 義一, 本田 明治, 高谷 康太郎, 石田 明生, 升本 順夫, 大淵 済, 中村 尚

  大会講演予講集, 2009, Japanese, 日本気象学会


• A358 実験的再解析データALERAの解析誤差分布の特徴について(解析誤差と鋭敏性,スペシャル・セッション「データ同化と予測可能性」II)

  山根 省三, 三好 建正, 榎本 剛, 大淵 済

  大会講演予講集, 2008, Japanese, 日本気象学会


• P132 CFESによる高解像度大気海洋結合シミュレーション(III)

  小守 信正, 田口 文明, 吉田 聡, 佐々木 英治, 榎本 剛, 野中 正見, 笹井 義一, 本田 明治, 高谷 康太郎, 大淵 済, 中村 尚

  大会講演予講集, 2008, Japanese, 日本気象学会


• D202 火星大気大循環モデルで表現されるダスト巻き上げ量の解像度依存性(大気力学II)

  高橋 芳幸, 林 祥介, 小高 正嗣, 大淵 済

  大会講演予講集, 2008, Japanese, 日本気象学会


• Dust lifting process represented by a high resolution Mars general circulation model

  Takahashi Yoshiyuki O., Hayashi Yoshi-Yuki, Odaka Masatsugu, Ohfuchi Wataru

  日本流体力学会年会講演論文集, 2008, Japanese, 日本流体力学会, In order to investigate the effects of small and medium scale atmospheric circulation and disturbances on dust lifting process on Mars, the high resolution simulations of the Martian atmosphere are performed by using a Mars general circulation model. The simulations with horizontal resolutions of 89, 44, and 22km show that the dust lifting amount increases with increasing resolution. The increase of dust lifting amount is mainly caused by the lifting around several regions with characteristic orographic features, such as the Valles Marineris and the Hellas basin. The analysis of dust lifting phenomena in the Valles Marineris region shows that the superposition of local slope wind and the return flow of meridional circulation causes the large dust lifting in the region. This implies that the effects of small and medium scale local orographic circulation play an important role in lifting dust on Mars.


• P390 AFESへの乱流凝結過程の導入(その2) : 大気海洋結合系における熱帯海洋表層循環への影響

  田口 文明, 吉田 聡, 小守 信正, 佐々木 英治, 野中 正見, 榎本 剛, 大淵 済

  大会講演予講集, 2007, Japanese, 日本気象学会


• D204 火星大気大循環モデルで見られた日変化する小規模渦(大気力学)

  高橋 芳幸, 林 祥介, 小高 正嗣, 大淵 済

  大会講演予講集, 2007, Japanese, 日本気象学会


• P201 オホーツク海海氷密接度と爆弾低気圧発生数の統計解析(太平洋・インド洋域における大気海洋結合現象)

  吉田 聡, 小守 信正, 大淵 済

  大会講演予講集, Apr. 2006, 社団法人日本気象学会


• A262 CFESによる高解像度大気海洋結合シミュレーション(II)(太平洋・インド洋域における大気海洋結合現象,専門分科会)

  小守 信正, 吉田 聡, 榎本 剛, 大淵 済

  大会講演予講集, Apr. 2006, 社団法人日本気象学会


• CFESによる熱帯季節内振動の再現性

  榎本 剛, 小守 信正, 大淵 済

  大会講演予講集, Apr. 2006


• D406 火星大気大循環モデルで表現される中小規模擾乱の構造(大気力学II)

  高橋 芳幸, 林 祥介, 小高 正嗣, 大淵 済

  大会講演予講集, 2006, Japanese, 日本気象学会


• C410 大気大循環モデルで表現される赤道域降水活動の循環構造解析 : 背景風移流と赤道波に着目して(熱帯大気)

  山田 由貴子, 高橋 芳幸, 林 祥介, 石渡 正樹, 大淵 済, 中島 健介

  大会講演予講集, 2006, Japanese, 日本気象学会


• A206 大気大循環モデルのアンサンブル実験に見られる擾乱の発展について(気象予報)

  山根 省三, 三好 建正, 榎本 剛, 大淵 済

  大会講演予講集, 2006, Japanese, 日本気象学会


• D361 全球大気海洋結合シミュレーションにおける低気圧活動とオホーツク海の海氷(相互作用)

  吉田 聡, 小守 信正, 大淵 済

  大会講演予講集, Oct. 2005, 社団法人日本気象学会


• P318 CFESによる高解像度大気海洋結合シミュレーション

  小守 信正, 吉田 聡, 大淵 済

  大会講演予講集, Apr. 2005, 社団法人日本気象学会


• P313 大気大循環モデルの大規模凝結過程の改良

  吉田 聡, 榎本 剛, 小守 信正, 大淵 済

  大会講演予講集, Apr. 2005, 社団法人日本気象学会


• A resolution dependency of equatorial precipitation activities represented in a general circulation model

  YAMADA Yukiko, SAMPE Takeaki, TAKAHASHI Yoshiyuki O, YOSHIOKA Mayumi K, OHFUCHI Wataru, ISHIWATARI Masaki, NAKAJIMA Kensuke, HAYASHI Yoshi-Yuki

  NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan, Apr. 2005, 日本学術会議 「機械工学委員会・土木工学・建築学委員会合同IUTAM分科会」, An aqua planet experiment is performed to investigate the dependencies of the model representations of the equatorial precipitation activities on the horizontal and vertical resolution. The numerical model utilized is AFES, an AGCM optimized for the Earth Simulator. With the resolution of horizontal truncation at T39 and 48 vertical levels (referred to as the standard run), there appear precipitation disturbances of the scale of several grids, which are advected westward by the background wind. When the vertical resolution is increased to 96 levels from the standard run, precipitation tends to have weak intensity but be widely distributed, and the westward propagating grid-scale disturbances are rarely observed. When the horizontal resolution is increased to T319 from the standard run, a hierarchical structure appears. A large-scale eastward moving precipitation structure is superimposed on a small-scale westward moving structure.


• C254 2004年7月20日に関東地方で発生した猛暑のシミュレーション(顕著現象の予測可能性,専門分科会)

  榎本 剛, 大淵 済

  大会講演予講集, 2005, Japanese, 日本気象学会


• C104 大気大循環モデルで表現される赤道域降水活動の解像度依存性(熱帯大気I)

  山田 由貴子, 三瓶 岳昭, 高橋 芳幸, 吉岡 真由美, 大淵 済, 石渡 正樹, 中島 健介, 林 祥介

  大会講演予講集, 2005, Japanese, 日本気象学会


• D309 火星大気大循環モデルで表現されるダスト巻き上げと輸送(大気力学I)

  高橋 芳幸, 林 祥介, 小高 正嗣, 大淵 済

  大会講演予講集, 2005, Japanese, 日本気象学会


• B208 2004年7月の1か月アンサンブル予測実験(スペシャルセッション「2004年暑夏の原因を探る」)

  榎本 剛, 大淵 済

  大会講演予講集, 2005, Japanese, 日本気象学会


• B155 定常気候フィードバック解析のもう一つの表現法(気候システムII)

  大淵 済

  大会講演予講集, 2005, Japanese, 日本気象学会


• AM05-13-012 A Resolution Dependence of Equatorial Precipitation Activities Represented in a General Circulation Model

  YAMADA Yukiko, TAKAHASHI Yoshiyuki O., HAYASHI Yoshi-Yuki, ISHIWATARI Masaki, OHFUCHI Wataru, NAKAJIMA Kensuke

  日本流体力学会年会講演論文集, 2005, Japanese, 日本流体力学会, Aqua planet experiments are performed in order to investigate horizontal and vertical resolution dependencies of equatorial precipitation activities. The numerical model utilized is AGCM for Earth Simulator (AFES). The cumulus convective scheme is not used. With the increase of vertical resolution from 24 to 96 levels, there are not major differences in precipitation pattern. With the increase of horizontal resolution from T39 to T319, the eastward propagating envelope structures of the westward propagating individual grid-scale disturbances become evident.


• C465 亜熱帯ジェットと中緯度SST勾配がストームトラック活動に与える影響(ストームトラックの力学,専門分科会)

  三瓶 岳昭, 中村 尚, 高橋 芳幸, 大淵 済

  大会講演予講集, 2004, Japanese, 日本気象学会


• C364 高解像度全球大気シミュレーションによる熱帯低気圧の初期発生過程(台風)

  吉岡 真由美, 栗原 宜夫, 大淵 済

  大会講演予講集, 2004, Japanese, 日本気象学会


• D105 水惑星実験における時間・帯状平均量のモデル解像度依存性(大気力学)

  大淵 済, 山田 由貴子, 三瓶 岳昭, 吉岡 真由美, 高橋 芳幸

  大会講演予講集, 2004, Japanese, 日本気象学会


• C302 大気大循環モデルで表現される赤道域降水活動の解像度依存性(熱帯大気I)

  山田 由貴子, 三瓶 岳昭, 高橋 芳幸, 吉岡 真由美, 大淵 済, 石渡 正樹, 中島 健介, 林 祥介

  大会講演予講集, 2004, Japanese, 日本気象学会


• A313 A Resolution Dependency of Equatorial Precipitation Activities Represented in a General Circulation Model

  YAMADA Yukiko, SAMPE Takeaki, TAKAHASHI Yoshiyuki O., YOSHIOKA Mayumi K., Ohfuchi Wataru, ISHIWATARI Masaki, NAKAJIMA Kensuke, HAYASHI Yoshi-Yuki

  日本流体力学会年会講演論文集, 2004, Japanese, 日本流体力学会, Aqua planet experiments are performed in order to investigate horizontal and vertical resolution dependencies of equatorial precipitation activities. The numerical model utilized is AGCM for Earth Simulator (AFES). With the increased vertical resolution from 24 to 96 levels, weak precipitation intensity tends to be widely distributed, and the westward propagating grid-scale disturbances become obscured. With the increased horizontal resolution from T39 to T319, the eastward propagating envelope structures of the westward propagating individual grid-scale disturbances become evident.


• A460 冬季北半球循環場の長周期変動の変調と基本場のモード解析 : アリューシャン・アイスランド低気圧のシーソー現象に着目して(北極振動と中高緯度大気循環)

  山根 省三, 中村 尚, 本田 明治, 大淵 済

  大会講演予講集, 2003, Japanese, 日本気象学会


• A302 超高解像度全球大気モデルによるシミュレーション : その1 : 概要(気候システムII)

  大淵 済, 新宮 哲, 中村 尚, 吉岡 真由美, 榎本 剛, 高谷 康太郎, 山根 省三, 西村 照幸, 彭 新東, 渕上 弘光, 山田 将志, 栗原 宜夫, 二宮 洸三

  大会講演予講集, 2003, Japanese, 日本気象学会


• B407 Conservative Semi-Lagrangian Transport in Spherical Coordinate and the Application in AFES :

  PENG Xindong, XIAO Feng, OHFUCHI Wataru, FUCHIGAMI Hiromitsu

  大会講演予講集, 2003, English, 日本気象学会


• A209 2002年8月に欧州で発生した切離低気圧に対する大西洋上の熱帯低気圧の影響(気象予報)

  榎本 剛, 大淵 済, 中村 尚, Shapiro Melvyn A.

  大会講演予講集, 2003, Japanese, 日本気象学会


• A208 大気大循環モデル中での対流性降雨とグリッド凝結降雨の比の積雲対流パラメタリゼーションと解像度に対する感度(気象予報)

  大淵 済, 高橋 芳幸, 榎本 剛

  大会講演予講集, 2003, Japanese, 日本気象学会


• P144 超高解像度大気大循環シミュレーションから得られた水平波数スペクトル

  高橋 芳幸, 大淵 済, Hamilton Kevin

  大会講演予講集, 2003, Japanese, 日本気象学会


• P315 地球シミュレータ用大気海洋海氷結合モデルCFESの開発

  小守 信正, 高橋 桂子, 小峯 賢治, 大淵 済, 佐川 玄輝, 佐々木 英治, 美山 透, 望月 崇, 本井 達夫, 栗原 宜, 中村 尚, 佐久間 弘文, 佐藤 哲也, CFES Working Team

  大会講演予講集, 2003, Japanese, 日本気象学会


• アリューシャン・アイスランド低気圧の経年変動の内部・外部分散について

  山根 省三, 本田 明治, 中村 尚, 大淵 済

  大会講演予講集, Oct. 2002, Japanese


• Emanuel積雲スキームを用いたAFESによる北半球夏季大循環の再現性

  榎本 剛, 渕上 弘光, 新宮 哲, 大淵 済

  大会講演予講集, Oct. 2002, Japanese


• 高解像度大気大循環モデルで表現される台風

  吉岡 真由美, 大淵 済, 西村 照幸, 山根 省三, 栗原 宜夫

  大会講演予講集, Oct. 2002, Japanese


• 大気大循環モデルの降水に関する考察

  鈴木 恒明, 江守 正多, 大淵 済, 西村 照幸, 松村 伸治

  大会講演予講集, May 2002, Japanese


• 高分解能大気大循環モデルによる気候研究にむけて

  西村 照幸, 大淵 済, 鈴木 恒明, 松村 伸治, 江守 正多, 阿部 彩子, 木本 昌秀

  大会講演予講集, Oct. 2001, Japanese


• 水平-鉛直解像度の組み合わせに対するAGCMダイナミカル・コアの対流圏大循環の感度

  大淵 済

  大会講演予講集, Oct. 2001, Japanese

• Re-consideration on the atmospheric circulation on an aquaplanet: toward the proposal of a new model intercomparison, APE2

  NAKAJIMA Kensuke

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Kyushu University, 01 Apr. 2014 - 31 Mar. 2018

  Numerical experiments using atmospheric general circulation models are conducted with “Aquaplanet” lower boundary conditions where whole of the earth’s surface is covered with ocean. Main findings are as follows. First, a westward propagating large scale organization of precipitation with north-south "zigzag" structure is newly identified, in addition to the well known eastward propagating structure. Second, the structure of 'Walker circulation’, a global stationary circulation feature forced by the anomaly of sea surface temperature, is highly sensitive to the average north-south surface temperature difference of the ocean. Sensitivity of both results to the model specification including physical parameterizations and spatial resolution promotes a new international aquaplanet general circulation model intercomparison project, APE2.


• Basin scale atmosphere and ocean interaction

  Minobe Shoshiro, KOMORI NOBUMASA, INATSU MASARU, YOSHIDA AKIRA, SASAKI YOSHINORI, OFUCHI WATARU, ISOGUCHI OSAMU, KAWAMOTO KAZUAKI, KACHI MISAKO, Schneider Niklas, O'Reilly Christopher H., Small Richard Justin

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Hokkaido University, 01 Apr. 2010 - 31 Mar. 2016

  By using numerical modelling and data analysis, we have discovered the mid-latitude ocean influences on a wide range of atmospheric phenomena, including termination of Baiu rain season over the northwestern North Pacific, the route and strength of tropical cyclones, Europe blocking and its impact on cold spells. We have found that the pressure adjustment mechanism works over major western boundary currents in the mid-latitudes globally. We have developed a new diagnostic method that enable us to determine mechanisms near surface (10 m altitude) winds for time-mean field, and have showed that both the pressure adjustment mechanism and the vertical mixing mechanism working but differently. Also, we have reported for the first time that observed decadal variability of the Kuroshio Extension is due to the jet-trapped Rossby wave, and that the decadal Kuroshio Extension changes impact Japanese coastal sea-level.


• Research on the representation of precipitation structure in general circulation models based on the results of the Aqua-Planet Experiment Project

  HAYASHI Yoshi-yuki, NAKAJIMA Kensuke, OHFUCHI Wataru, TAKAYA Koutarou, ISHIWATARI Masaki, TAKAHASHI Yoshiyuki, WILLIANSON David L., BLACKBURN Michael

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Kobe University, 2009 - 2011

  Comprehensive analyses are made on the output from the general circulation model experiments under idealized lower boundary conditions in the Aqua-Planet Experiment Project(APE), which was participated by 14 modeling groups aiming at climate studies or numerical weather prediction in the world. The results demonstrate a great variety among the structure of tropical precipitation disturbances simulated in the participating models, both in wavenumber space and in real space. In addition, new theoretical insights are obtained, one of which concerns the spectral property of the hierarchical rainfall structure and another concerns the variety of large-scale atmospheric response to a localized sea surface temperature anomaly placed on the equator.