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Ishiwatari Masaki
| Faculty of Science Earth and Planetary Sciences Cosmosciences | Professor |
Researcher basic information
■ Degree■ URL
researchmap URLホームページURL■ Various IDs
J-Global ID■ Research Keywords and Fields
Research Keyword
- 大気大循環モデル
- 暴走温室状態
- 系外惑星
- 降水分布
- 同期回転惑星
- 多重平衡解
- 全球凍結状態
- エネルギーバランスモデル
- 太陽定数
- 熱輸送
- 気候多様性
- 暴走室温状態
- 生命存在可能性
- 表面温度分布
- 雲スキーム
- 自転角速度
- 惑星大気
- 気象学
- データベース
- 情報システム
- 海面熱フラックス
- 地球観測
- 水惑星
- 環境分析
- ハドレー循環
- 海面水温
- データストレージ
- GCM
- 積雲と大規模運動の相互作用
- 情報基盤
- Natural Science, Atmospheric and hydrospheric sciences
- Natural Science, Astronomy
- Natural Science, Solid earth sciences
- Bachelor's degree program, School of Science
- Master's degree program, Graduate School of Science
- Doctoral (PhD) degree program, Graduate School of Science
Research activity information
■ Papers- The circulation pattern and day-night heat transport in the atmosphere of a synchronously rotating aquaplanet: Dependence on planetary rotation rate
S. Noda; M. Ishiwatari; K. Nakajima; Y. O. Takahashi; S. Takehiro; M. Onishi; G. L. Hashimoto; K. Kuramoto; Y. -Y. Hayashi
ICARUS, 282, 1, 18, Jan. 2017, [Peer-reviewed]
English, Scientific journal - A Numerical Study of Convection in a Condensing CO2 Atmosphere under Early Mars-Like Conditions
Tatsuya Yamashita; Masatsugu Odaka; Ko-ichiro Sugiyama; Kensuke Nakajima; Masaki Ishiwatari; Seiya Nishizawa; Yoshiyuki O. Takahashi; Yoshi-Yuki Hayashi
Journal of the Atmospheric Sciences, 73, 10, 4151, 4169, American Meteorological Society, Oct. 2016, [Peer-reviewed]
English, Scientific journal - Martian dust devil statistics from high-resolution large-eddy simulations
Nishizawa, Seiya; Odaka, Masatsugu; Takahashi, Yoshiyuki O.; Sugiyama, Ko-ichiro; Nakajima, Kensuke; Ishiwatari, Masaki; Takehiro, Shin-ichi; Yashiro, Hisashi; Sato, Yousuke; Tomita, Hirofumi; Hayashi, Yoshi-Yuki
Geophysical Research Letters, 43, 9, 4180, 4188, 2016, [Peer-reviewed]
English, 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
JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN, 91A, 91, 141, Sep. 2013, [Peer-reviewed]
English, 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
JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN, 91A, 143, 193, Sep. 2013, [Peer-reviewed]
English, Scientific journal - Effective hydrodynamic hydrogen escape from an early Earth atmosphere inferred from high-accuracy numerical simulation
Kiyoshi Kuramoto; Takafumi Umemoto; Masaki Ishiwatari
EARTH AND PLANETARY SCIENCE LETTERS, 375, 312, 318, Aug. 2013, [Peer-reviewed]
English, Scientific journal - Baroclinic modes in the atmosphere on Venus simulated by AFES
Sugimoto, N; M. Takagi; Y. Matsuda; Y. O. Takahashi; M. Ishiwatari; Y.-Y. Hayashi
Theor. Appl. Mech. Japan, 61, 11, 21, 2013, [Peer-reviewed]
English, Scientific journal - 木星の大気構造と雲対流
杉山 耕一朗; 中島 健介; 小高 正嗣; 石渡 正樹; 倉本 圭; 高橋 芳幸; 林 祥介
遊・星・人, 21, 39, 44, 2012, [Peer-reviewed]
Japanese, Scientific journal - THE APE ATLAS
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. Kitoh; R. Stratton
NCAR Technical Note, 2012, [Peer-reviewed]
English, Scientific journal - Numerical modeling for Venus atmosphere based on AFES (Atmospheric GCM For the Earth Simulator)
N. Sugimoto; M. Takagi; Y. Matsuda; Y. O. Takahashi; M. Ishiwatari; Y.-Y. Hayashi
System Simulation and Scientific Computing, 70, 78, 2012, [Peer-reviewed]
English, Scientific journal - Dependence of equatorial precipitation activity on the vertical profile of radiative cooling in an aqua-planet experiment
Nakajima, K; Y. Yamada; M. Ishiwatari; Y.-Y. Hayashi
Nagare Multimedia, 2012, [Peer-reviewed]
English, Scientific journal - "Gtool5": a Fortran90 library of input/output interfaces for self-descriptive multi-dimensional numerical data
M. Ishiwatari; E. Toyoda; Y. Morikawa; S. Takehiro; Y. Sasaki; S. Nishizawa; M. Odaka; N. Otobe; Y. O. Takahashi; K. Nakajima; T. Horinouchi; M. Shiotani; Y.-Y. Hayashi; Gtool development group
Geosci. Model Dev., 5, 2, 449, 455, Copernicus {GmbH}, 2012, [Peer-reviewed]
English, Scientific journal - The Aqua Planet Experiment (APE): CONTROL SST Simulation
Blackburn, M; D. L. Williamson; K. Nakajima; W. Ohfuchi; Y. O. Takahashi; Y.-Y. Hayashi; H. Nakamura; M. Ishiwatari; J. 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. Kitoh; R. Stratton
J, Meteor. Soc. Japan, 91A, 71, 56, 2012, [Peer-reviewed]
English, Scientific journal - The Aqua Planet Experiment (APE): Response to changed meridional SST profil
Blackburn, M; D. L. Williamson; K. Nakajima; W. Ohfuchi; Y. O. Takahashi; Y.-Y. Hayashi; H. Nakamura; M. Ishiwatari; J. 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. Kitoh; R. Stratton
J, Meteor. Soc. Japan, 91A, 71, 56, 2012, [Peer-reviewed]
Scientific journal - Toward high resolution simulation for the atmosphere r
N. Sugimoto; M. Takagi; Y. Matsuda; Y.O. Takahashi; M. Ishiwatari; Y.-Y. Hayashi
Proceedings of International Conference on Simulation Technology, momoko, 2012, [Peer-reviewed] - Intermittent cumulonimbus activity breaking the three-layer cloud structure of Jupiter
K. Sugiyama; K. Nakajima; M. Odaka; M. Ishiwatari; K. Kuramoto; Y. Morikawa; S. Nishizawa; Y. O. Takahashi; Y-Y. Hayashi
GEOPHYSICAL RESEARCH LETTERS, 38, Jul. 2011, [Peer-reviewed]
English, Scientific journal - Eigen modes of a linear shear flow in shallow water on an equatorial β-plane(Nagare-Multimedia)
TANIGUCHI Hiroshi; ISHIWATARI Masaki
Journal of Japan Society of Fluid Mechanics, 27, 4, 337, 338, 日本流体力学会, Aug. 2008
English, Scientific journal, Eigen modes of a linear shear flow in shallow water on an equatorialβ-plane are obtained over a wide parameter range. High-order unstable modes, neutral modes, and continuous modes are examined based on the results of Taniguchi and Ishiwatari (2006) that investigates mainly the lowest order most unstable modes. It is found that some continuous modes have equatorial Rossby wave like structures, and that high-order zonally symmetric unstable modes are caused by resonance between eastward mixed Rossby-gravity modes and continuous modes or by resonance between eastward inertial gravity modes and continuous modes. Neutral modes whose dispersion curves intersect with nearby dispersion curves of other neutral modes are also examined. Behaviors of dispersion curves of equatorial Kelvin modes and westward mixed Rossby-gravity modes are observed in cases that the two curves come closer. - 地球流体データベース・解析・可視化のための新しいサーバ兼デスクトップツール Gfdnavi の開発
堀之内武; 西澤誠也; 渡辺知恵美; 森川靖大; 神代剛; 石渡正樹; 林祥介; 塩谷雅人
Proceedings of Data Engineering Workshop, D2, D8, 2007, [Peer-reviewed]
Japanese, Scientific journal - Dependence of equilibrium states of gray atmosphere on solar constant: from the runaway greenhouse to the snowball states
Ishiwatari, M; K. Nakajima; S. Takehiro; Y.-Y. Hayashi
J.Geophys. Res., 112, 2007, [Peer-reviewed]
Scientific journal - Physical interpretation of unstable modes of a linear shear flow in shallow water on an equatorial beta-plane
Hiroshi Taniguchi; Masaki Ishiwatari
JOURNAL OF FLUID MECHANICS, 567, 1, 26, Nov. 2006, [Peer-reviewed]
English, Scientific journal - SPMODEL: A Series of Hierarchical Spectral Models for Geophyiscal Fluid Dynamics(Nagare-Multimedia)
TAKEHIRO Shin-ichi; ODAKA Masatsugu; ISHIOKA Keiichi; ISHIWATARI Masaki; HAYASHI Yoshi-Yuki; SPMODEL Development Group
Journal of Japan Society of Fluid Mechanics, 25, 5, 485, 486, 日本流体力学会, Oct. 2006
English, Scientific journal, A series of spectral models which facilitate the execution of standard numerical experiments in geophysical fluid dynamics problems have been developed. Readability and modifiability of the program source codes are given priority in its design. The introduction of systematic function naming rules and the utilization of array-handling features enhanced by Fortran90 have permitted the program source codes to be written in a form that may be readily derived from the mathematical expressions of the original governing equations. - A resolution dependence of equatorial precipitation activities represented in a general circulation model
Yamada, Y; T. Sampe; Y.O. Takahashi; M.K. Yoshioka; W. Ohfuchi; M. Ishiwatari; K. Nakajima; Y.-Y. Hayashi
Theor. Appl. Mech. Japan, 54, 289, 297, 2005, [Peer-reviewed]
English, Scientific journal - Initial development of tropical precipitation patterns in response to a local warm SST area: An aqua-planet ensemble study
K Nakajima; E Toyoda; M Ishiwatari; S Takehiro; YY Hayashi
JOURNAL OF THE METEOROLOGICAL SOCIETY OF JAPAN, 82, 6, 1483, 1504, Dec. 2004
English, Scientific journal - Linear stability of thermal convection in rotating systems with fixed heat flux boundaries
SI Takehiro; M Ishiwatari; K Nakajima; YY Hayashi
GEOPHYSICAL AND ASTROPHYSICAL FLUID DYNAMICS, 96, 6, 439, 459, 2002, [Peer-reviewed]
English, Scientific journal - A numerical study on the appearence of runaway greenhouse state in a three-dimensional gray atmosphere
Ishiwatari, M; S. Takehiro; K. Nakajima; Y.-Y. Hayashi
J. Atmos. Sci., 59, 3223, 3238, 2002, [Peer-reviewed]
English, Scientific journal - 火星大気の放射対流とダストの混合
小高 正嗣; 中島 健介; 石渡 正樹; 林 洋介
ながれ : 日本流体力学会誌, 20, 6, 427, 428, The Japan Society of Fluid Mechanics, 25 Dec. 2001
Japanese - Numerical modeling of Jupiter's moist convection layer
K Nakajima; S Takehiro; M Ishiwatari; YY Hayashi
GEOPHYSICAL RESEARCH LETTERS, 27, 19, 3129, 3132, Oct. 2000, [Peer-reviewed]
English, Scientific journal - The effects of thermal boundary condition on convection in rapidly rotating spherical shells
Takehiro, S; M. Ishiwatari; K. Nakajima; Y.-Y. Hayashi
Theoretical and Applied Mech., 48, 415, 421, 1999, [Peer-reviewed]
English, Scientific journal - Coupled ocean-atmospheric waves on the equatorial front
SP Xie; M Ishiwatari; H Hashizume; K Takeuchi
GEOPHYSICAL RESEARCH LETTERS, 25, 20, 3863, 3866, Oct. 1998, [Peer-reviewed]
English, Scientific journal - A numerical study of the Martian atmospheric convection with a two-dimensional anelastic model
ODAKA Masatsugu; NAKAJIMA Kensuke; TAKEHIRO Shin-ichi; ISHIWATARI Masaki; HAYASHI Yoshi-yuki
Earth, planets and space, 50, 5, 431, 437, May 1998
English - Tropical Precipitation Patterns in Response to a Local Warm SST Area Placed at the Equator of an Aqua Planet
Hosaka Masahiro; Ishiwatari Masaki; Takehiro Shin-ichi; Nakajima Kensuke; Hayashi Yoshi-Yuki
Journal of the Meteorological Society of Japan. Ser. II, 76, 2, 289, 305, 社団法人日本気象学会, Apr. 1998
English, Aqua planet experiments are performed in order to investigate the effects of an equatorial warm sea surface temperature(SST) area on the tropical large-scale precipitation patterns. The numerical model utilized is a spherical three-dimensional primitive system with resolution of T42L16 and with simplified hydrological processes. The warm SST area is placed at the equator of an aqua planet whose basic SST distribution is zonally uniform and symmetric about the equator. The calculated tropical precipitation distributions are characterized by the appearance of an east-west asymmetry; precipitation decreases to the west of the warm SST area, while it increases in the longitudinally wide area to the east. The east-west asymmetry appears regardless of the cumulus parameterization schemes utilized(the convective adjustment scheme and the Kuo scheme). In the western region to the warm SST area, an increase of the stability due to a temperature rise in the middle layer is observed and correspondingly downward flow is recognized. These are consistent with the decrease of precipitation. In the eastern region, although a temperature rise appears in the middle layer, the stability decreases due to the increase of water vapor in the lower layer caused by the meridional moisture convergence. This destabilization is consistent with the increase of precipitation. Experiments in which the wind velocity used in the evaluation of the surface evaporation is fixed are performed to show that WISHE(Wind Induced Surface Heat Exchange)mechanism is not a principal cause for the generation of the east-west asymmetry of the precipitation pattern. - 暴走温室状態の発生条件
石渡正樹
遊・星・人, 7, 125, 133, 1998, [Peer-reviewed]
Japanese, Scientific journal - Convection in a rotating cylindrical annulus with fixed heat flux boundaries
Shin-ichi Takehiro; Masaki Ishiwatari; Kensuke Nakajima; Yoshi-Yuki Hayashi
Nagare Multimedia, 1998, [Peer-reviewed]
English, Scientific journal - The dependency of the structure of the thee-dimensional gray atmosphere on the solar constant and the runaway greenhouse states
Masaki Ishiwatari
Nagare Multimedia, 1998, [Peer-reviewed]
English, Scientific journal - The effects of thermal conditions on the cell sizes of two-dimensional convection
Ishiwatari, M; S. Takehiro; Y.-Y. Hayashi
J.Fluid Mech., 281, 33, 50, 1994, [Peer-reviewed]
English, Scientific journal
- B168 系外惑星大気の3次元計算のための放射モデル開発(惑星大気科学の現在,スペシャル・セッション)
大西 将徳; はしもと じょーじ; 倉本 圭; 高橋 芳幸; 石渡 正樹; 高橋 康人; 林 祥介, 大会講演予講集, 106, 145, 145, 30 Sep. 2014
社団法人日本気象学会, Japanese - B158 火星ダスト巻き上げスキームのDCPAMへの実装及び地表面ダストフラックス診断実験(惑星大気科学の現在,スペシャル・セッション)
荻原 弘尭; 高橋 芳幸; 石渡 正樹; 小高 正嗣; 林 祥介, 大会講演予講集, 106, 135, 135, 30 Sep. 2014
社団法人日本気象学会, Japanese - B160 初期火星大気中の主成分凝結対流の二次元数値実験 : 雲分布の凝結核数混合比に対する依存性(惑星大気科学の現在,スペシャル・セッション)
山下 達也; 小高 正嗣; 杉山 耕一朗; 中島 健介; 石渡 正樹; 西澤 誠也; 高橋 芳幸; 林 祥介, 大会講演予講集, 106, 137, 137, 30 Sep. 2014
社団法人日本気象学会, Japanese - B167 同期回転惑星の大気循環における雲の効果に関する数値実験(惑星大気科学の現在,スペシャル・セッション)
石渡 正樹; 阿部 豊; 倉本 圭; 高橋 芳幸; 中島 健介; 林 祥介, 大会講演予講集, 106, 144, 144, 30 Sep. 2014
社団法人日本気象学会, Japanese - O1-03 火星ダスト巻き上げスキームの大気大循環モデルDCPAMへの実装及びダスト巻き上げフラックス診断実験(口頭発表セッション1 惑星大気,口頭発表)
荻原 弘尭; 高橋 芳幸; 石渡 正樹; 小高 正嗣; 林 祥介, 日本惑星科学会秋期講演会予稿集, 2014, "O1, 03", 10 Sep. 2014
日本惑星科学会, Japanese - O2-05 巨大ガス惑星の雲層構造と放射冷却過程(口頭発表セッション2 系外惑星,口頭発表)
高橋 康人; はしもと じょーじ; 石渡 正樹; 高橋 芳幸; 大西 将徳; 倉本 圭, 日本惑星科学会秋期講演会予稿集, 2014, "O2, 05", 10 Sep. 2014
日本惑星科学会, Japanese - O1-05 同期回転惑星大気の数値実験 : 昼夜間熱輸送に関する検討(口頭発表セッション1 惑星大気,口頭発表)
石渡 正樹; 阿部 豊; 倉本 圭; 高橋 芳幸; 中島 健介; 林 祥介, 日本惑星科学会秋期講演会予稿集, 2014, "O1, 05", 10 Sep. 2014
日本惑星科学会, Japanese - O1-06 初期火星大気中の主成分凝結対流の二次元数値実験 : 雲分布の凝結核数混合比に対する依存性(口頭発表セッション1 惑星大気,口頭発表)
山下 達也; 小高 正嗣; 杉山 耕一朗; 中島 健介; 石渡 正樹; 西澤 誠也; 高橋 芳幸; 林 祥介, 日本惑星科学会秋期講演会予稿集, 2014, "O1, 06", 10 Sep. 2014
日本惑星科学会, Japanese - P343 金星雲層を想定した鉛直対流の数値計算(ポスターセッション)
杉山 耕一朗; 川畑 拓也; 小高 正嗣; 中島 健介; 石渡 正樹, 大会講演予講集, 105, 319, 319, 30 Apr. 2014
社団法人日本気象学会, Japanese - D102 雲の存在を考慮した同期回転惑星大気の数値実験(大気力学,口頭発表)
石渡 正樹; 阿部 豊; 倉本 圭; 高橋 芳幸, 大会講演予講集, 104, 95, 95, 31 Oct. 2013
社団法人日本気象学会, Japanese - P334 初期火星大気中の主成分凝結対流の二次元数値実験 : 臨界飽和比と凝結核数密度に対する依存性(ポスター・セッション)
山下 達也; 小高 正嗣; 杉山 耕一朗; 中島 健介; 石渡 正樹; 林 祥介, 大会講演予講集, 103, 326, 326, 30 Apr. 2013
社団法人日本気象学会, Japanese - D411 木星大気の雲対流の直接数値計算:雲対流の間欠性に関する考察(大気力学,口頭発表)
杉山 耕一朗; 小高 正嗣; 中島 健介; 石渡 正樹; 倉本 圭; 高橋 芳幸; 西澤 誠也; 林 祥介, 大会講演予講集, 103, 376, 376, 30 Apr. 2013
社団法人日本気象学会, Japanese - General Circulations of Atmosphere of Synchronously Rotating Planets Covered with Ocean
Noda Satoshi; Ishiwatari Masaki; Nakajima Kensuke; Takahashi Yoshiyuki; Takehiro Shin-ichi; Onishi Masanori; Nishizawa Seiya; Hayashi Yoshi-Yuki, NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan, 62, 0, 2013
Circulations of atmosphere of synchronously rotating planets, which have perpetual dayside and nightside, are investigated by using a general circulation model with simplified hydrological processes.Results of experiments with various planetary rotation rate and solar constant show that the upper limit of solar constant with which equilibrium states are maintained is almost independent of rotation rate. The upper limit is determined by the radiation limit.In cases where equilibrium states are obtained, the amount of day-night energy transport is independent of rotation rate and determined by the difference between dayside mean insolation flux and radiation limit, although circulation changes., National Committee for IUTAM, Japanese - O4-03 火星境界層乱流のLES実験(口頭発表セッション4(惑星大気,衝突科学I),口頭発表)
西澤 誠也; 八代 尚; 宮本 佳明; 小高 正嗣; 高橋 芳幸; 林 祥介; 富田 浩文; 竹広 真一; 石渡 正樹; 中島 健介; 佐藤 陽祐; 杉山 耕-朗; Team SCALE; 地球流体竜脳倶楽部, 日本惑星科学会秋期講演会予稿集, 2012, 39, 39, 24 Oct. 2012
日本惑星科学会, Japanese - C156 火星境界層乱流のLES実験(スペシャル・セッション「惑星大気科学の課題と将来の探査計画」,口頭発表)
西澤 誠也; 八代 尚; 宮本 佳明; 小高 正嗣; 高橋 芳幸; 林 祥介; 富田 浩文; 竹広 真一; 石渡 正樹; 中島 健介; 佐藤 陽祐; 杉山 耕一朗; Team SCALE; 地球流体電脳倶楽部, 大会講演予講集, 102, 137, 137, 30 Sep. 2012
社団法人日本気象学会, Japanese - C160 惑星大気大循環モデルdcpamを用いた金星設定における放射強制変更実験(スペシャル・セッション「惑星大気科学の課題と将来の探査計画」,口頭発表)
石渡 正樹; 馬場 健聡; 高橋 芳幸; 竹広 真一; 林 祥介, 大会講演予講集, 102, 141, 141, 30 Sep. 2012
社団法人日本気象学会, Japanese - C163 AFESを用いた金星大気の傾圧不安定に関する研究(スペシャル・セッション「惑星大気科学の課題と将来の探査計画」,口頭発表)
杉本 憲彦; 高木 征宏; 松田 佳久; 高橋 芳幸; 石渡 正樹; 林 祥介, 大会講演予講集, 102, 144, 144, 30 Sep. 2012
社団法人日本気象学会, Japanese - B310 火星極冠上空を想定した主成分凝結対流の二次元数値実験(降水システムII,一般口頭発表)
山下 達也; 小高 正嗣; 杉山 耕一朗; 中島 健介; 石渡 正樹; 高橋 芳幸; 西澤 誠也; 林 祥介, 大会講演予講集, 101, 309, 309, 30 Apr. 2012
社団法人日本気象学会, Japanese - Atmospheric structure and cloud convection in Jupiter's atmosphere(
Sciences toward future explorations for the Jovian and Saturnian systems)
Sugiyama K; Nakajima K; Odaka M; Ishiwatari M; Kuramoto K; Takahashi Y. O; Hayashi Y.-Y, Planetary People, 21, 1, 39, 44, 25 Mar. 2012
光の透過性の問題で,木星雲層の大気構造の観測は断片的・間接的にならざるを得ず,その構造は未だよくわかっていない.1970年代に,鉛直1次元の平衡雲凝結モデルによって大気構造が理論的に調べられ,組成の異なる3成分の雲が別々の高度に分かれて存在するという描像が作られた.この描像は,一般的に受け入れられているが,大気の運動や降水等の雲微物理過程によって変化するはずである.筆者らはH_2OとNH_3の凝結とNH_4SHの生成反応を考慮した雲解像モデルを開発し,多数の雲の生成消滅が繰り返された結果として決まる大気構造を調べてきた.本稿ではこれまでの木星雲層の大気構造の認識を概観しつつ,筆者らの最近の研究結果を紹介する., 日本惑星科学会, Japanese - D111 惑星大気計算のための大循環モデルならびに雲解像モデルの構築(大気力学,一般口頭発表)
高橋 芳幸; 杉山 耕一朗; 小高 正嗣; 石渡 正樹; 佐々木 洋平; 西澤 誠也; 中島 健介; 竹広 真一; 林 祥介, 大会講演予講集, 100, 290, 290, 31 Oct. 2011
社団法人日本気象学会, Japanese - D113 同期回転惑星大気における熱収支の自転角速度依存性(大気力学,一般口頭発表)
納多 哲史; 石渡 正樹; 中島 健介; 高橋 芳幸; 森川 靖大; 西澤 誠也; 林 祥介, 大会講演予講集, 100, 292, 292, 31 Oct. 2011
社団法人日本気象学会, Japanese - S21-04 木星型惑星を想定したH_2-He大気の鉛直一次元放射対流平衡モデル : 大気冷却率と熱構造の下部境界条件依存性(口頭セッション21:惑星観測,口頭発表)
高橋 康人; 倉本 圭; 石渡 正樹, 日本惑星科学会秋期講演会予稿集, 2011, 39, 39, 23 Oct. 2011
日本惑星科学会, Japanese - S32-05 同期回転惑星大気における熱収支の自転角速度依存性(口頭セッション32:惑星環境進化,口頭発表)
納多 哲史; 石渡 正樹; 中島 健介; 高橋 芳幸; 森川 靖大; 西澤 誠也; 林 祥介, 日本惑星科学会秋期講演会予稿集, 2011, 75, 75, 23 Oct. 2011
日本惑星科学会, Japanese - S32-06 共通のプログラムスタイルを持つ大気大循環モデルと雲解像モデルの開発(口頭セッション32:惑星環境進化,口頭発表)
高橋 芳幸; 杉山 耕一朗; 小高 正嗣; 石渡 正樹; 佐々木 洋平; 西澤 誠也; 中島 健介; 竹広 真一; 林 祥介, 日本惑星科学会秋期講演会予稿集, 2011, 76, 76, 23 Oct. 2011
日本惑星科学会, Japanese - D104 主成分凝結を伴う2次元大気対流の準平衡状態(惑星大気,一般口頭発表)
山下 達也; 小高 正嗣; 杉山 耕一朗; 中島 健介; 石渡 正樹; 高橋 芳幸; 西澤 誠也; 林 祥介, 大会講演予講集, 99, 223, 223, 30 Apr. 2011
社団法人日本気象学会, Japanese - D106 同期回転惑星における暴走限界の自転角速度・日射分布依存性(惑星大気,一般口頭発表)
納多 哲史; 石渡 正樹; 中島 健介; 高橋 芳幸; 森川 靖大; 西澤 誠也; 林 祥介, 大会講演予講集, 99, 225, 225, 30 Apr. 2011
社団法人日本気象学会, Japanese - 121 同期回転惑星における太陽定数増大実験(オーラルセッション3 内惑星・ハビタブルプラネット)
納多 哲史; 石渡 正樹; 中島 健介; 高橋 芳幸; 森川 靖大; 西澤 誠也; 林 祥介, 日本惑星科学会秋期講演会予稿集, 2010, 21, 21, 06 Oct. 2010
日本惑星科学会, Japanese - D311 同期回転惑星における太陽定数増大実験(大気力学,口頭発表)
納多 哲史; 石渡 正樹; 中島 健介; 高橋 芳幸; 森川 靖大; 西澤 誠也; 林 祥介, 大会講演予講集, 98, 319, 319, 30 Sep. 2010
社団法人日本気象学会, Japanese - D405 同期回転惑星の大気大循環とその自転角速度依存性(大気力学,一般口頭発表)
納多 哲史; 石渡 正樹; 中島 健介; 高橋 芳幸; 森川 靖大; 西澤 誠也; 林 祥介, 大会講演予講集, 97, 209, 209, 30 Apr. 2010
社団法人日本気象学会, Japanese - P103 主成分凝結を伴う火星大気対流の二次元数値実験(ポスターセッション)
山下 達也; 小高 正嗣; 杉山 耕一朗; 中島 健介; 石渡 正樹; 林 祥介, 大会講演予講集, 97, 220, 220, 30 Apr. 2010
社団法人日本気象学会, Japanese - C307 大気大循環モデルを用いた陸と海のある惑星の大気大循環計算(スペシャル・セッション「惑星大気の多様性」)
高橋 芳幸; 林 祥介; 石渡 正樹; 森川 靖大; 中島 健介, 大会講演予講集, 96, 229, 229, 31 Oct. 2009
社団法人日本気象学会, Japanese - C308 系外惑星の気候探索をめざした数値モデルの開発(スペシャル・セッション「惑星大気の多様性」)
石渡 正樹; 高橋 芳幸; 杉山 耕一朗; 小高 正嗣; 中島 健介; 林 祥介; 地球流体電脳倶楽部dcmodelプロジェクト, 大会講演予講集, 96, 230, 230, 31 Oct. 2009
社団法人日本気象学会, Japanese - 309 惑星大気雲対流モデルの開発(オーラルセッション10 惑星気象・惑星大気)
杉山 耕一朗; 山下 達也; 小高 正嗣; 中島 健介; 高橋 芳幸; 竹広 真一; 石渡 正樹; 林 祥介, 日本惑星科学会秋期講演会予稿集, 2009, 60, 60, 28 Sep. 2009
日本惑星科学会, Japanese - A two dimensional numerical experiment of atmospheric convection with condensation of the major component
YAMASHITA Tatsuya; ODAKA Masatsugu; SUGIYAMA Ko-ichiro; NAKAJIMA Kensuke; ISHIWATARI Masaki; HAYASHI Yoshi-Yuki, Proceedings, ... meeting of Japan Society of Fluid Mechanics, 2009, 44, 44, 02 Sep. 2009
A 2D non-hydrostatic model to simulate atmospheric convection with condensation of major component is developed. We use quasi-compressible equations with taking cloud particles growth by diffusion process into account. Horizontally uniform body heating/cooling is introduced instead of explicite calculation of the atmospheric radiative transfer. As initial temperature profile, we choose profile of Martian polar cap. For the case with critical saturation ratio (S_<cr>) of 1.35 without falling of cloud particle, after 30 day integration, quasi-equilibrium state is realized. In this state, region above 1km height is covered with clouds. In case with S_<cr>=1.0 without falling of cloud particle, no quasi-equilibrium state seem to be realized. In cases of S_<cr>=1.0, and 1.35 with falling of cloud particle, quasi-equilibrium states seem to exist, which will be confirmed with further time integrations. The results for cases without falling of cloud particle suggest that structure of cloud convection is significantly changed according to the value of S_<cr>., Japan Society of Fluid Mechanics, Japanese - Report: GFD Dennou Club dcmodel/davis tutorial seminar
Ishiwatari Masaki; GFD-Dennou Club; dcmodel project; GFD-Dennou Club; davis project, Planetary People, 18, 2, 125, 127, 25 Jun. 2009
The Japanese Society for Planetary Sciences, Japanese - A402 階層的数値モデルのためのデータ入出力ライブラリGtoo15の設計と開発(大気力学・中高緯度大気)
森川 靖大; 高橋 芳幸; 小高 正嗣; 石渡 正樹; 林 祥介, 大会講演予講集, 95, 73, 73, 30 Apr. 2009
社団法人日本気象学会, Japanese - A405 大気主成分の凝結を考慮した二次元湿潤対流の基礎的数値実験(大気力学・中高緯度大気)
山下 達也; 小高 正嗣; 杉山 耕一朗; 中島 健介; 石渡 正樹; 林 祥介, 大会講演予講集, 95, 76, 76, 30 Apr. 2009
社団法人日本気象学会, Japanese - 107 同期回転惑星大気における循環構造(惑星の形成および惑星大気,オーラルセッション1)
石渡 正樹; 中島 健介; 森川 靖大; 高橋 芳幸; 小高 正嗣; 倉本 圭; 林 祥介, 日本惑星科学会秋期講演会予稿集, 2008, 7, 7, 01 Nov. 2008
日本惑星科学会, Japanese - 201 火星大気における渦を伴う鉛直対流の三次元数値計算(火星と水星の科学,オーラルセッション5)
小高 正嗣; 山下 達也; 杉山 耕一朗; 中島 健介; 石渡 正樹; 林 祥介, 日本惑星科学会秋期講演会予稿集, 2008, 35, 35, 01 Nov. 2008
日本惑星科学会, Japanese - 202 大気主成分の凝結を考慮した二次元雲対流モデルによる火星大気の数値計算(火星と水星の科学,オーラルセッション5)
山下 達也; 小高 正嗣; 杉山 耕一朗; 中島 健介; 石渡 正樹; 林 祥介, 日本惑星科学会秋期講演会予稿集, 2008, 36, 36, 01 Nov. 2008
日本惑星科学会, Japanese - D304 可変性と可読性を考慮した大気大循環モデルの開発 : ソースコードの簡潔さを重視したモデル設計(スペシャル・セッション「惑星大気の新しい観測と理論」)
森川 靖大; 石渡 正樹; 高橋 芳幸; 杉山 耕一朗; 小高 正嗣; 中島 健介; 林 祥介, 大会講演予講集, 94, 325, 325, 31 Oct. 2008
社団法人日本気象学会, Japanese - D308 3次元非静力学モデルによる火星大気対流の数値計算 : 2次元モデル計算との比較(スペシャル・セッション「惑星大気の新しい観測と理論」)
小高 正嗣; 山下 達也; 杉山 耕一朗; 中島 健介; 石渡 正樹; 林 祥介, 大会講演予講集, 94, 329, 329, 31 Oct. 2008
社団法人日本気象学会, Japanese - Development of a three dimensional non-hydrostatic model for Martian atmosphere and a numerical simulation of thermal convection
ODAKA Masatsugu; YAMASHITA Tatsuya; SUGIYAMA Ko-ichiro; NAKAJIMA Kensuke; ISHIWATARI Masaki; HAYASHI Yoshi-Yuki, Proceedings, ... meeting of Japan Society of Fluid Mechanics, 2008, 378, 378, 04 Sep. 2008
We develop a three dimensional non-hydrostatic model and perform a numerical simulation of thermal convection in the Martian atmosphere without background wind and dust radiative heating. The numerical model based on the two dimensional quasi-compressible model developed by Sugiyama et al. (2008). The atmospheric radiative transfer is not calculated explicitly, and a horizontally uniform body cooling is introduced below 5km height. After 12 hours of integration, the thermal convection whose horizontal scale of updraft region is several km is developed. The upward wind velocity reaches from 10 to 15m/sec while the downward wind velocity is about several m/sec. At the lowest level of the three dimensional model (z=50m), isolated vertical vortexes which horizontal scale is about several hundred m are developed frequently. This result suggests that the vertical vortex like dust devils may be naturally developed accompanied with the convective motion without background wind., Japan Society of Fluid Mechanics, Japanese - Eigen modes of a linear shear flow in shallow water on an equatorial .BETA.-plane
TANIGUCHI Hiroshi; ISHIWATARI Masaki, nagare, 27, 4, 337, 338, 2008
Eigen modes of a linear shear flow in shallow water on an equatorial β-plane are obtained over a wide parameter range. High-order unstable modes, neutral modes, and continuous modes are examined based on the results of Taniguchi and Ishiwatari (2006) that investigates mainly the lowest order most unstable modes. It is found that some continuous modes have equatorial Rossby wave like structures, and that high-order zonally symmetric unstable modes are caused by resonance between eastward mixed Rossby-gravity modes and continuous modes or by resonance between eastward inertial gravity modes and continuous modes. Neutral modes whose dispersion curves intersect with nearby dispersion curves of other neutral modes are also examined. Behaviors of dispersion curves of equatorial Kelvin modes and westward mixed Rossby-gravity modes are observed in cases that the two curves come closer., The Japan Society of Fluid Mechanics, Japanese - B259 赤道β平面浅水系の線形シアー流中で発生する「交差モード」の解釈(大気力学)
谷口 博; 石渡 正樹, 大会講演予講集, 92, 157, 157, 30 Sep. 2007
社団法人日本気象学会, Japanese - B305 可変性と可読性を考慮した大気大循環モデルの開発と湿潤惑星の数値実験(スペシャルセッション「さまざまな対流」)
森川 靖大; 石渡 正樹; 杉山 耕一朗; 高橋 芳幸; 小高 正嗣; 中島 健介; 林 祥介, 大会講演予講集, 92, 166, 166, 30 Sep. 2007
社団法人日本気象学会, Japanese - B306 同期回転惑星の大気大循環の数値計算(スペシャルセッション「さまざまな対流」)
石渡 正樹; 中島 健介; 森川 靖大; 高橋 芳幸; 小高 正嗣; 倉本 圭; 林 祥介, 大会講演予講集, 92, 167, 167, 30 Sep. 2007
社団法人日本気象学会, Japanese - A numerical experiment of a moist planet with a general circulation model
MORIKAWA Yasuhiro; SUGIYAMA Ko-ichiro; TAKAHASHI Yoshiyuki O; ODAKA Masatsugu; ISHIWATARI Masaki; NAKAJIMA Kensuke; HAYASHI Yoshi-Yuki, Proceedings, ... meeting of Japan Society of Fluid Mechanics, 2007, 246, 246, 06 Aug. 2007
Aiming for constructing an atmospheric general circulation model (GCM) with high readability and flexibility, desired program structures have been considered and their implementation tests have been performed. A flexible GCM whose programs can be easily changed is useful for investigating the structures of various planetary atmospheres from the viewpoint of comparative planetary science. In order to consider moist atmospheric circulations such as Earth and Jupiter, we have performed following attempts for facilitating exchanges of physical processes; (1) a design of physical process modules, (2) a development of a library for the production of test programs, (3) an improvement of document auto-generation library RDoc., Japan Society of Fluid Mechanics, Japanese - D465 水惑星実験における赤道域降水パターンに対する鉛直乱流混合過程の影響(熱帯大気)
山田 由貴子; 石渡 正樹; 中島 健介; 林 祥介, 大会講演予講集, 91, 236, 236, 30 Apr. 2007
社団法人日本気象学会, Japanese - P224 地球流体データの公開・共有・解析・可視化のためのツールGfdnaviの開発
堀之内 武; 西澤 誠也; 渡辺 知恵美; 神代 剛; 塩谷 雅人; 森川 靖大; 林 祥介; 石渡 正樹; 電脳davisプロジェクト, 大会講演予講集, 91, 306, 306, 30 Apr. 2007
社団法人日本気象学会, Japanese - Document generation for numerical models by RDoc.
MORIKAWA Yasuhiro; ISHIWATARI Masaki; HORINOUCHI Takeshi; ODAKA Masatsugu; HAYASHI Yoshi-Yuki, Tenki, 54, 2, 185, 190, 28 Feb. 2007
社団法人日本気象学会, Japanese - A numerical experiment of a moist planet as an idealization of Jovian atmosphere with a general circulation model
Morikawa Yasuhiro; Sugiyama Ko-ichiro; Takahashi Yoshiyuki; Odaka Masatsugu; Ishiwatari Masaki; Nakajima Kensuke; Hayashi Yoshi-Yuki, Abstracts for fall meeting of the Japanese Society for Planetary Science, 2007, 0, 93, 93, 2007
For the purpose of performing comprehensive numerical experiments on various moist atmospheres including terrestrial and Jovian atmospheres, an atmospheric general circulation model flexible in changing program codes is designed and implemented. It is often necessary to exchange numerical schemes of indeterminate physical processes such as cumulus process. In order to facilitate those exchanges, (1) a general design for physical process modules with initializing routines is presented, (2) a standard procedure for testing each physical process is presented and a common library for constructing test programs is developed., THE JAPANESE SOCIETY FOR PLANETARY SCIENCES - A GCM experiment on an atmosphere of a synchronously rotating planet.
Ishiwatari Masaki; Nakajima Kensuke; Morikawa Yasuhiro; Takahashi Yoshiyuki; Odaka Masatsugu; Kuramoto Kiyoshi; Hayashi Yoshi-yuki, Abstracts for fall meeting of the Japanese Society for Planetary Science, 2007, 0, 95, 95, 2007
Extrasolar planets near stars is considered to rotatesynchronously due to strong tidal force. On a synchronously rotating planet, one side is permanentlyilluminated while the other side is in perpetual darkness. Joshi et al. (1997) performs an atmospheric GCM simulation on a synchronouslyrotating planet, but their model does not contain hydrologic processes. In this study, a GCM experiment is performed fora moist atmosphere on a synchronously rotating planet, and atmospheric circulation and heat transport are examined. The results indicate thatlongitudinal heat transport in the low latitudinal region is caused by propagation of equatorial Kelvin and Rossby waves,and that in the higher latitudinal regionis caused by baroclinic eddies., THE JAPANESE SOCIETY FOR PLANETARY SCIENCES - P356 大気大循環モデルの赤道域対流圏に表れた2種類のケルビン波的シグナル
山田 由貴子; 石渡 正樹; 中島 健介; 林 祥介, 大会講演予講集, 90, 404, 404, 30 Sep. 2006
社団法人日本気象学会, Japanese - 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, 89, 204, 204, 30 Apr. 2006
社団法人日本気象学会, Japanese - D401 RDocを用いた数値モデルのドキュメント生成(大気力学II)
森川 靖大; 石渡 正樹; 堀之内 武; 小高 正嗣; 林 祥介, 大会講演予講集, 89, 238, 238, 30 Apr. 2006
社団法人日本気象学会, Japanese - SPMODEL: A Series of Hierarchical Spectral Models for Geophyiscal Fluid Dynamics
TAKEHIRO Shin-ichi; ODAKA Masatsugu; ISHIOKA Keiichi; ISHIWATARI Masaki; HAYASHI Yoshi-Yuki; SPMODEL Development Group, nagare, 25, 5, 485, 486, 2006
A series of spectral models which facilitate the execution of standard numerical experiments in geophysical fluid dynamics problems have been developed. Readability and modifiability of the program source codes are given priority in its design. The introduction of systematic function naming rules and the utilization of array-handling features enhanced by Fortran90 have permitted the program source codes to be written in a form that may be readily derived from the mathematical expressions of the original governing equations., The Japan Society of Fluid Mechanics, Japanese - Development of a general circulation model for planetary atmospheres: the GFD Dennou Club DCPAM
Morikawa Yasuhiro; Ishiwatari Masaki; Takahashi Yoshiyuki; Odaka Masatsugu; Hayashi Yoshi-Yuki, Abstracts for fall meeting of the Japanese Society for Planetary Science, 2006, 0, 68, 68, 2006
Aiming for an atmospheric general circulation model (GCM) with a flexible and readable source code, a dynamical core is newly designed and its implementation tests are performed. In order to improve the flexibility and readability of the model, the source code is hierarchically structured by the use of modules and derived-type variables, array-valued functions are frequently used for operating array-valued variables, a set of naming rules are newly introduced for variables and functions, and a tool set for automatic generation of reference document (RDoc) are improved. The dynamical core developed here is named DCPAM, and is provided at http://www.gfd-dennou.org/ ., THE JAPANESE SOCIETY FOR PLANETARY SCIENCES - D304 東西一様基本場に於ける慣性不安定(5) : 高次モードの解釈(大気力学I)
谷口 博; 石渡 正樹, 大会講演予講集, 88, 272, 272, 31 Oct. 2005
社団法人日本気象学会, Japanese - P123 火星大気湿潤対流のための非静力学モデルの定式化
小高 正嗣; 北守 太一; 杉山 耕一朗; 中島 健介; 高橋 芳幸; 石渡 正樹; 林 祥介, 大会講演予講集, 88, 320, 320, 31 Oct. 2005
社団法人日本気象学会, Japanese - P388 ソフトウェアとしての可読性を重視した全球プリミティブモデル
森川 靖大; 石渡 正樹; 高橋 芳幸; 小高 正嗣; 林 祥介, 大会講演予講集, 88, 481, 481, 31 Oct. 2005
社団法人日本気象学会, Japanese - 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, Proceedings, ... meeting of Japan Society of Fluid Mechanics, 2005, 267, 267, 05 Sep. 2005
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., Japan Society of Fluid Mechanics, Japanese - AM05-13-013 Design and implementation tests of a dynamical core for a general circulation model with a flexible and readable source code
MORIKAWA Yasuhiro; ISHIWATARI Masaki; TAKAHASHI Yoshiyuki O; ODAKA Masatsugu; HAYASHI Yoshi-Yuki, Proceedings, ... meeting of Japan Society of Fluid Mechanics, 2005, 268, 268, 05 Sep. 2005
Aiming for an atmospheric general circulation model (GCM) with readability and flexibility, a dynamical core is newly designed and implemented. Readability and flexibility are expected to be increased by the use of advantageous features of Fortran 90 and by proposing a programming style. The programming style is to help us imagine the corresponding equations of the original physical system. The implemented dynamical core is examined by the benchmark test for GCM dynamical core proposed by Held and Suarez (1994). According to the results of 1200 day integration with the horizontal resolutions of T21, T42, and T63, it is confirmed that the Hadley circulation and mid-latitudinal disturbances are well expressed., Japan Society of Fluid Mechanics, Japanese - 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, 87, 152, 152, 30 Apr. 2005
社団法人日本気象学会, Japanese - 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, 54, 0, 123, 123, 2005
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., National Committee for IUTAM - Formulation of a non-hydrostatic model for moist convection in theMartian atmosphere
Odaka Masatsugu; Kitamori Taichi; Sugiyama Ko-ichiro; Nakajima Kensuke; Takahashi Yoshiyuki; Ishiwatari Masaki; Hayashi Yoshi-Yuki, Abstracts for fall meeting of the Japanese Society for Planetary Science, 2005, 0, 93, 93, 2005
Formulation of a non-hydrostatic model for moist convection associated with condensation of major atmospheric component in the Martian atmosphere is examined. When the supersaturation of carbon dioxide is small or the time scal of condensation is longer than that of sound wave, a modified quasi-compressible system in which a mass source term associated with condensation is introduced in the continuity equation can be adapted for the Martian atmospheric moist convection. We develop a 2D non-hydrostatic model based on the formulation of modified quasi-compressible system and investigate flow patterns associated with the Martian atmospheric moist convection with steady thermal forcing., THE JAPANESE SOCIETY FOR PLANETARY SCIENCES - Numerical modeling of cloud convection in Titan's atmosphere
Nakajima Kensuke; Ishiwatari Masaki; Takehiro Shin-ichi; Hayashi Yoshi-Yuki, Abstracts for fall meeting of the Japanese Society for Planetary Science, 2005, 0, 96, 96, 2005
The structure of convective clouds in Titan's troposphere and their role in methane cycle between the atmosphere and the ground surface are investigated using a fluid dynamical model containing parameterized microphysical processes. Cloud convection is driven by a body cooling in the troposphere and heat and methane fluxes from the ground surface. Preliminary result shows the followings: (i) Titan's ground surface must be considerably dry in order to explain the observed methane undersaturation in the lower atmosphere, (ii) even with such dry surface conditiion, cloud convection is active, (iii) most of the methane rain produced in the convective clouds evaporates in unsaturated lower troposphere., THE JAPANESE SOCIETY FOR PLANETARY SCIENCES - 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, 86, 259, 259, Oct. 2004
社団法人日本気象学会, Japanese - D111 東西一様基本場に於ける慣性不安定(4) : 中立波の共鳴による東西非対称モードと東西対称モードの解釈(大気力学)
谷口 博; 石渡 正樹, 大会講演予講集, 86, 304, 304, Oct. 2004
社団法人日本気象学会, Japanese - 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, Proceedings, ... meeting of Japan Society of Fluid Mechanics, 2004, 490, 491, 09 Aug. 2004
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., Japan Society of Fluid Mechanics, Japanese - A341 Physical Interpretation of Unstable Modes of a Linear Shear Flow in Shallow Water on an Equatorial β-Plane
TANIGUCHI Hiroshi; ISHIWATARI Masaki, Proceedings, ... meeting of Japan Society of Fluid Mechanics, 2004, 516, 517, 09 Aug. 2004
Unstable modes of a linear shear flow in shallow water on an equatorial β-plane are obtained over a wide range of a non-dimensional parameter corresponding to Lamb parameter, and are interpreted physically by the use of the concept of resonance between neutral waves. The results indicate that there exist two resonating types for most unstable modes: (i) the resonance of equatorial Kelvin modes and continuous modes, (ii) the resonance of equatorial Kelvin modes and westward mixed Rossby-gravity modes. Examinations of dispersion curves suggests that unstable modes of type (ii) mode with zonally asymmetric structure is the same kind of instability as so-called zonally symmetric inertial unstable modes., Japan Society of Fluid Mechanics, Japanese - P122 階層的地球流体力学スペクトルモデル集SPMODEL
小高 正嗣; 石渡 正樹; 竹広 真一; 石岡 圭一; 林 祥介, 大会講演予講集, 85, 244, 244, May 2004
社団法人日本気象学会, Japanese - P165 スマトラ島西岸域における西方伝播する雲域の持続性について
上延 史; 石渡 正樹; 森 修一; 濱田 純一; Tauhid Yudi Iman; 村田 文絵; 荒木 龍蔵; Sribimawati Tien, 大会講演予講集, 85, 287, 287, May 2004
社団法人日本気象学会, Japanese - P221 水惑星実験における赤道域降水活動の放射冷却率鉛直分布依存性
山田 由貴子; 石渡 正樹; 中島 健介; 林 祥介, 大会講演予講集, 85, 325, 325, May 2004
社団法人日本気象学会, Japanese - Tropical Precipitation Patterns in Response to a Local Warm SST Area : an Ensemble Aqua Planet Study
NAKAJIMA Kensuke; YAMADA Yukiko; ISHIWATARI Masaki; HAYASHI YoshiYuki, Proceedings, ... meeting of Japan Society of Fluid Mechanics, 2003, 154, 155, 28 Jul. 2003
The initial development of the atmospheric response to a warm SST anomaly placed at the equator is examined by way of an ensemble switch-on experiment with an aqua planet GCM. An ensemble average of the size of 128 satisfactory reduces the transient noise and reveal the character of the response which follows. In a few days after the switch-on of the SST anomaly, a convection center develops, and a global increase of surface pressure occurs as a barotropic response to the heating. The response afterward is consistent with Gill (1980); a warm Kelvin/Rossby wave-like anomaly is emitted to the east/west of the convection center, except that the characteristic wave speed is that of moist gravity waves. After several days, precipitation is intensified/suppressed to the east/west of the SST anomaly because of the surface frictional convergence/divergence caused by relative low/high pressure anomaly along the equator in the Kelvin/Rossby wave-like response., Japan Society of Fluid Mechanics, Japanese - Dependency of equilibrium states of gray atmosphere on solar constant : from the runaway greenhouse to the snowball states
ISHIWATARI Masaki; NAKAJIMA Kensuke; TAKEHIRO Shinichi; HAYASHI YoshiYuki, Proceedings, ... meeting of Japan Society of Fluid Mechanics, 2003, 156, 157, 28 Jul. 2003
Multiple equilibrium solutions of gray atmosphere are investigated for various values of solar constant. Models used are a three-dimensional primitive model (GCM) and a one-dimensional energy balance model (EBM). Solutions obtained by models are only ice-covered states for small values of solar constant, and only runaway greenhouse states for large values of solar constant. For intermediate values, multiple solutions are obtained, for instance, a combination of ice-covered state, partially ice-covered state and the runaway greenhouse state. The large ice cap instability discussed in previous EBMs also occurs in GCM, since a partially ice-covered state with ice line latitude lower than 20 degree is not obtained. Contrary to results of EBMs, an equilibrium solution in which ice line latitude is 22 degree is obtained in GCM. The solution is maintained by condensation heating near ice line latitude., Japan Society of Fluid Mechanics, Japanese - Development of a general circulation model for the Earth type planetary atmosphere AGCM6
ODAKA Masatsugu; ISHIWATARI Masaki; TAKEHIRO Shinichi; ISHIOKA Keiichi; TOYODA Eizi; HAYASHI YoshiYuki, Proceedings, ... meeting of Japan Society of Fluid Mechanics, 2003, 158, 159, 28 Jul. 2003
GFD Dennou CLub AGCM6 is now being designed as an atmospheric general circulation model that helps us to understand dynamics and to perform a comparative study of the planetary atmospheres. The major target is to develop a software structure which enables us to change the model geometry and to build in or remove physical and/or dynamical processes with ease. For the purpose of considering AGCM6 architecture, we are now reinforcing the SPMODEL library. The SPMODEL library is designed to be a series of spectral models of typical equation systems which appear in the field of geophysical fluid dynamics. The spherical shallow water model of SPMODEL library is now provided and can be utilized for further designing of the dynamical core of AGCM6, Japan Society of Fluid Mechanics, Japanese - B153 灰色大気の平衡状態の太陽定数依存性 : 暴走温室状態から全球凍結状態まで(力学を介しての横断的理解)
石渡 正樹; 中島 健介; 竹広 真一; 林 祥介, 大会講演予講集, 83, 92, 92, 21 May 2003
社団法人日本気象学会, Japanese - 熱帯大気の暖水域に対する応答 : アンサンブル水惑星実験による時間発展の抽出
中島 健介; 石渡 正樹; 竹広 真一; 豊田 英司; 林 祥介, 大会講演予講集, 82, 234, 234, 09 Oct. 2002
Japanese - Simple numerical GFD experiments by use of spectral models constructed with ISPACK and gtool4
Takehiro Shinichi; Ishioka Keiichi; Toyoda Eizi; Ishiwatari Masaki; Hayashi YoshiYuki, Proceedings, ... meeting of Japan Society of Fluid Mechanics, 2002, 68, 69, 23 Jul. 2002
A set of spectral models suitable for performing standard numerical experiments of geophysical and planetary fluid dynamics problems is developed. Our policy for the development of the program codes is, 1) anyone can read, use and modify the source programs; 2) the sources programs should be so understandable that anyone can re-build and modify the programs; 3) visualization and post-processing should be performed easily. For the first and second requirements, Fortran90 modules for spectral models are prepared by wrapping the subroutines of ISPACK Fortran77 library. The programs can be clearly understandable, since they can be written in a similar form to the mathematical expressions with the help of a systematic function naming and array handling features of Fortran90. The self descriptive data format 'gtool4' is used for output to satisfy the third requirement. Commands for simple post-processing of gtool4 data, such as visualizing and arithmetic operations, are also developed., Japan Society of Fluid Mechanics, Japanese - すべての気象データに使えるデータベースの要件 : gtool4プロジェクトを通じて見えてきたもの
豊田 英司; 石渡 正樹; 竹広 真一; 林 祥介; 地球流体電脳倶楽部Davisプロジェクト, 大会講演予講集, 81, 438, 438, May 2002
Japanese - Numerical simulation of cloud convection in the atmosphere of Titan: A preliminary study
Nakajima Kensuke; Takehiro Shin-ichi; Ishiwatari Masaki; Hayashi Yoshi-Yuki, Abstracts for fall meeting of the Japanese Society for Planetary Science, 2002, 0, 58, 58, 2002
THE JAPANESE SOCIETY FOR PLANETARY SCIENCES - A numerical simulation of thermal convection in the Martian lower atmosphere with a two-dimensional anelastic model
ODAKA Masatsugu; NAKAJIMA Kensuke; ISHIWATARI Masaki; HAYASHI Yoshi-yuki, ながれ : 日本流体力学会誌, 20, 6, 507, 508, 25 Dec. 2001
Japanese - 熱帯大気の暖水域に対する応答 : アンサンブル水惑星実験による時間発展の抽出(続報)
中島 健介; 豊田 英司; 石渡 正樹; 林 祥介, 大会講演予講集, 80, 10 Oct. 2001
Japanese - A two-dimensional numerical simulation of Martian atmospheric convection : dust injection due to convective wind
ODAKA Masatsugu; NAKAJIMA Kensuke; ISHIWATARI Masaki; HAYASHI YoshiYuki, Proceedings, ... meeting of Japan Society of Fluid Mechanics, 2001, 513, 514, 31 Jul. 2001
A numerical simulation of possible Martian atmospheric convection driven by diurnally-varying radiative heating is performed with a two-dimensional anelastic model employing radiative process appropriate for clear sky conditions. The simulated convection has kilometer-size circulation cell which extends about 5 km horizontally and 10 km vertically. The values of calculated surface stress produced by the kilometer-size convection frequently exceed the minimum threshold value for raising dust from the surface. This result implies that kilometer-size convection forced by diurnally-varying radiative heating may strongly contribute to the dust injection into the Martian atmosphere., Japan Society of Fluid Mechanics, Japanese - 火星大気放射対流の数値計算 : 対流の風によるダストの巻き上げ
小高 正嗣; 中島 健介; 石渡 正樹; 林 祥介, 大会講演予講集, 79, 384, 384, 08 May 2001
Japanese - 多次元数値データの自己記述的入出力ライブラリ gtool4/Fortran90 の開発 : Fortran 90 モジュール構成と移植性
豊田 英司; 石渡 正樹; 林 祥介; 竹広 真一; 堀之内 武; 地球流体電脳倶楽部; davis プロジェクト, 大会講演予講集, 78, 429, 429, 18 Oct. 2000
Japanese - Development of gtool4 : a self-descriptive storage format for multi-dimensional numerical data
TOYODA Eizi; ISHIWATARI Masaki; HAYASHI YoshiYuki; AKAHORI Koji; NUMAGUTI Atusi; GFD-Dennou Club; Davis Project, Proceedings, ... meeting of Japan Society of Fluid Mechanics, 2000, 361, 362, 25 Jul. 2000
Storage format for multi-dimensional numerical data is developed for the purpose of researches mainly on geophysical fluid phenomena. In order to achieve platform-independency, netCDF is used for low-level file format. NetCDF conventions for variables and attributes are presented to realize self-descriptiveness, which flexibly support visualization information and various kind of grid-structure. A visualization and analysis software written in Fortran 90 is now under development in order to demonstrate self-descriptiveness of the data format, Japan Society of Fluid Mechanics, Japanese - A two-dimensional numerical simulation of Martian atmospheric convection : comparison with a one-dimensional model with parameterized convection
ODAKA Masatsugu; NAKAJIMA Kensuke; ISHIWATARI Masaki; HAYASHI YoshiYuki, Proceedings, ... meeting of Japan Society of Fluid Mechanics, 2000, 399, 400, 25 Jul. 2000
Numerical simulation of Martian atmospheric convection under dust-free condition is performed by use of a 2-dimensional (2D) anelastic atmospheric model. The result of 2D simulation is compered with that of a 1-dimensional (1D) model where the convection is parameterized as vertical diffusion. Treatment of physical processes other than the convection are same in the two models. The 2D model simulation with diurnal change of surface temperature shows that vertical wind velocity reaches 30m/sec and horizontal wind velocity exceeds 20m/sec. The vertical wind velocity is by an order of magnitude larger than that in the 1D model diagnosed from the simulated vertical diffusion coefficient. These results suggest that dust injection to Martian atmosphere can be accomplished by the convective wind superposed on large scale wind., Japan Society of Fluid Mechanics, Japanese - Dependency of inertial instability mode on Lamb's parameter
TANIGUCHI Hiroshi; ISHIWATARI Masaki, Proceedings, ... meeting of Japan Society of Fluid Mechanics, 2000, 407, 408, 25 Jul. 2000
We investigate the linear stability of linear shear flows in order to consider the selection mechanism of the zonal wavenumber of disturbances. The linearized non-dimensional primitive equations on the equatorial beta-plane are solved. Values of Lamb's parameter (E) are 0.0031622 ∿ 31622777. The results indicate that unstable modes appear with E greater than 0.1,and that symmetric modes are most unstable for E greater than 16., Japan Society of Fluid Mechanics, Japanese - The ice ball condition for the planet with gray atmoshpere
ISHIWATARI Masaki; NAKAJIMA Kensuke; TAKEHIRO Shinichi; HAYASHI YoshiYuki, Proceedings, ... meeting of Japan Society of Fluid Mechanics, 2000, 409, 410, 25 Jul. 2000
The condition of global frozen state (ice ball state) for the planet covered with gray atmosphere is considered by performing the numerical parameter studies with atmospheric general circulation model. When ice albed is 0.2,global frozen states emerge under the condition that the value of solar constant is less than 1100 W/m^2, Japan Society of Fluid Mechanics, Japanese - 多次元数値データの自己記述的格納形式 gtool4 の開発
豊田 英司; 石渡 正樹; 林 祥介; 赤堀 浩司; 堀之内 武; 沼口 敦, 大会講演予講集, 77, 395, 395, 24 May 2000
Japanese - Response of the Tropical Atmosphere to a Localized Warm SST Area:Tme-Development Observed in an Aqua-Planet Ensemble Experiment
TOYODA Eizi; NAKAJIMA Kensuke; ISHIWATARI Masaki; HAYASHI Yoshi-Yuki, ながれ : 日本流体力学会誌, 18, 6, 414, 415, 25 Dec. 1999
Japanese - P409 Numerical simulation of moist convection in Jovian atmosphere : sensitivity to vertical wind shear
Nakajima K; Takehiro S; Ishiwatari M; Hayashi Y. -Y, Abstracts Fall Meeting of the Japanese Society for Planetary Sciences, 1999, 39, 39, 13 Nov. 1999
The Japanese Society for Planetary Sciences, Japanese - P412 A numerical simulation of Martian atmospheric convection driven by radiative forcing
Odaka M; Nakajima K; Ishiwatari M; Hayashi Y. -Y, Abstracts Fall Meeting of the Japanese Society for Planetary Sciences, 1999, 42, 42, 13 Nov. 1999
The Japanese Society for Planetary Sciences, Japanese - On Inertial instability of Zonal Symmetric Flows - the mechanism of the selection of zonal wavenumber -
TANIGUCHI Hiroshi; ISHIWATARI Masaki, 年会一般講演, 18, 485, 486, 29 Jul. 1999
Japanese - Response of the Tropical Atmosphere to a Localized Warm SST Area: Time-Development Observed in an Aqua-Planet Experiment
TOYODA Eizi; NAKAJIMA Kensuke; ISHIWATARI Masaki; HAYASHI Yoshi-Yuki, 年会一般講演, 18, 503, 504, 29 Jul. 1999
Japanese - 熱フラックス固定境界条件での回転系の熱対流 (回転流の数理)
竹広 真一; 石渡 正樹; 中島 健介; 林 祥介, 数理解析研究所講究録, 1075, 85, 100, Jan. 1999
京都大学, Japanese - Numerical Simulation of Martian Atmospheric Convection
ODAKA Masatsugu; NAKAJIMA Kensuke; TAKEHIRO Shin-Ichi; ISHIWATARI Masaki; HAYASHI Yoshi-Yuki, 年会一般講演, 17, 365, 366, Jul. 1998
Japanese - The condition for emerging of the runaway greenhouse state (
Planetary Atmospheres)
ISHIWATARI Masaki, Planetary People, 7, 2, 125, 133, 25 Jun. 1998
The Japanese Society for Planetary Sciences, Japanese - 回転球殻内の熱対流と熱境界条件の影響 (総特集 地球内部の数値シミュレ-ション)
竹広 真一; 石渡 正樹; 中島 健介, 月刊地球, 20, 5, 298, 304, May 1998
海洋出版, Japanese - P418 Finite amplitude convection in rotating spherical shells and induced mean zonal flows
Takehiro S; Ishiwatari M; Nakajima K; Hayashi Y.-Y, Abstracts Fall Meeting of the Japanese Society for Planetary Sciences, 1997, 60, 60, 15 Sep. 1997
The Japanese Society for Planetary Sciences, Japanese - 603 The runaway limit of three-dimensional atmospheres : the effects of solar radiation distribution and rotation
Ishiwatari M; Nakajima K; Takehiro S; Hayashi Y.-Y, Abstracts Fall Meeting of the Japanese Society for Planetary Sciences, 1997, 83, 83, 15 Sep. 1997
The Japanese Society for Planetary Sciences, Japanese - 606 Numerical simulation of convection in Martian lower atmosphere
Odaka M; Nakajima K; Takehiro S; Ishiwatari M; Hayashi Y.-Y, Abstracts Fall Meeting of the Japanese Society for Planetary Sciences, 1997, 86, 86, 15 Sep. 1997
The Japanese Society for Planetary Sciences, Japanese - 705 Numerical simulation of moist convection in Jovian atmosphere
Nakajima K; Takehiro S; Ishiwatari M; Hayashi Y.-Y, Abstracts Fall Meeting of the Japanese Society for Planetary Sciences, 1997, 93, 93, 15 Sep. 1997
The Japanese Society for Planetary Sciences, Japanese - Numerical Simulation of Jovian Cloud Convection
NAKAJIMA Kensuke; TAKEHIRO Shin-ichi; ISHIWATARI Masaki; HAYASHI Yoshi-yuki, 年会一般講演, 16, 531, 532, Jul. 1997
Japanese - The energy transport of the gray atmospheres with increased solar flux
ISHIWATARI Masaki; NAKAJIMA Kensuke; TAKEHIRO Shin-ichi; HAYASHI Yoshi-yuki, 年会一般講演, 16, 533, 534, Jul. 1997
Japanese - The Effects on the Tropical Precipitation Patterns due to a Local Warm SST Area Placed at the Equator of an Aqua Planet
HOSAKA Masahiro; ISHIWATARI Masaki; TAKEHIRO Shin-ichi; NAKAJIMA Kensuke; HAYASHI Yoshi-yuki, 年会一般講演, 16, 537, 538, Jul. 1997
Japanese - 熱帯域にある局所的な暖水域が熱帯降水分布に与える影響
保坂 征宏; 石渡 正樹; 竹広 真一; 中島 健介; 林 祥介, 大会講演予講集, 70, 206, 206, 06 Nov. 1996
Japanese - 501 The integration of the runaway greenhouse state and determination of the runaway limit
Ishiwatari M; Nakajima K; Takehiro S; Hayashi Y. -Y, Abstracts Fall Meeting of the Japanese Society for Planetary Sciences, 1996, 63, 63, 02 Oct. 1996
The Japanese Society for Planetary Sciences, Japanese - Long Term Integrations of Runaway Greenhouse States
ISHIWATARI Masaki; NAKAJIMA Kensuke; HAYASHI Yoshi-yuki, 年会一般講演, 15, 469, 470, Jul. 1996
Japanese - 402 The heat budget in the runaway greenhouse state
Ishiwatari M; Nakajima K; Hayashi Y. -Y, Abstracts Fall Meeting of the Japanese Society for Planetary Sciences, 1995, 402, 402, 13 Nov. 1995
The Japanese Society for Planetary Sciences, Japanese - 251 Numerical simulations of the runaway greenhouse : comparison betwenn the 1D and 3D systems
Ishiwatari M; Hayashi Y. -Y, Abstracts Fall Meeting of the Japanese Society for Planetary Sciences, 1994, 251, 251, 03 Oct. 1994
The Japanese Society for Planetary Sciences, Japanese - 206 Numerical simulations of an atmosphere with a condensable component as the major element
Ishiwatari M; Hayashi Y. -Y, Abstracts Fall Meeting of the Japanese Society for Planetary Sciences, 1993, 206, 206, 15 Oct. 1993
The Japanese Society for Planetary Sciences, Japanese - 月例会「長期予報と大気大循環」の報告 : 熱的境界条件が2次元対流セルサイズに及ぼす影響
石渡 正樹; 竹広 真一; 林 祥介, 天気, 40, 5, 357, 357, 31 May 1993
社団法人日本気象学会, Japanese
