Faculty Profiles - NOZAWA Toru

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B154 全球3次元エアロゾル輸送・放射モデルを用いたエアロゾル直接・間接効果による気候変動の解析(気候システムI)

竹村俊彦, 野沢徹, 江守正多

大会講演予講集 84 103 - 103 2003

D303 全球3次元エアロゾル輸送・放射モデルを用いた雲・エアロゾル相互作用のパラメタリゼーション(物質循環II)

竹村俊彦, 野沢徹, 久芳奈遠美

大会講演予講集 84 285 - 285 2003

地球温暖化の影響対策研究から見た気候モデル研究

江守正多, 高橋潔, 野沢徹, 神沢博

大会講演予講集 81 28 - 28 2002.5

Changes in the Atmospheric General Circulation due to the Global Warming

NOZAWA Toru, EMORI Seita, TSUSHIMA Yoko, TAKEMURA Toshihiko, NAKAJIMA Teruyuki, ABE Ayako, KIMOTO Masahide

2002 268 - 269 2002

Language：Japanese

Responses in the atmospheric general circulation to the global warming are studied with the Center for Climate System Research (CCSR) / National Institute for Environmental Studies (NIES) coupled ocean-atmosphere general circulation model (CGCM). Atmospheric concentration of the carbon dioxide is gradually increased by 1% per year for 150 years. The Hadley cells in the low latitudes are expanded into up-and pole-ward, and their intensity is increased in the northern winter while it is decreased in the northern summer. The Ferrell cells in the middle latitudes shift into the poleward. The westerly jet in the middle latitudes also shifts into up- and pole-ward because the barotropic zone gets narrow due to the expansion of the Hadley cell. In the northern winter, the westerly jet gets strong in the northern part of the Pacific and Atlantic Ocean suggesting that the extratropical cyclones are intensified.

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温暖化実験にみられるCCSR/NIES CGCMの気候感度について

野沢徹, 阿部彩子, 對馬洋子, 江守正多, 沼口敦, 竹村俊彦, 中島映至, 木本昌秀

大会講演予講集 79 135 - 135 2001.5

Importance of Cumulus Parameterization for Precipitation Simulation over East Asia in June :

Emori Seita, Nozawa Toru, Numaguti Atusi, Uno Itsushi

Journal of the Meteorological Society of Japan. Ser. II 79 ( 4 ) 939 - 947 2001

Language：English Publisher：Meteorogical Society of Japan

A regional climate model, NIES/CCSR RAMS, was used with the ECMWF objective analysis data as boundary conditions to reproduce the precipitation pattern over East Asia in June, including that accompanying the Baiu front. In the control experiment, the simulated precipitation pattern was unrealistic, mainly in two respects:precipitation over the Baiu front was too weak, and strong precipitation was found over the North Pacific subtropical high at around 20°N. According ot the ECMWF data, strong potential instability is maintained over the subtropical high, under which condition, the cumulus parameterization used in the model predicts strong precipitation to stabilize the atmosphere. Because the lower free atmosphere is very dry over the subtropical high, it is conjectured that the development of deep cumulus convection is suppressed by this dry air in the real atmosphere. When the cumulus parameterization was modified to include this assumption, the intensity of precipitation over the Baiu front as well as the unrealistic precipitation pattern over the subtropical high was clearly ameliorated. The intensification of precipitation over the Baiu front is considered to be due to the increased water vapor transport to the Baiu front, and the decreased stability with respect to the moist convection around the Baiu front. In semi-prognostic experiments with CCSR/NIES AGCM, this modification was found to be also effective in many other parts of the globe. Because problems in precipitation distribution similar to that discussed in the present sutdy are found in many other climate models, the modification of cumulus parameterization suggested here could also be effective in those models.

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Other Link： http://dl.ndl.go.jp/info:ndljp/pid/10611922

Simulation of Future Aerosol Distribution, Radiative Forcing, and Long-range Transport in East Asia

Takemura Toshihiko, Nakajima Teruyuki, Nozawa Toru, Aoki Kazuma

48 ( 12 ) 929 - 930 2001

大気海洋結合モデルによる将来の気候変化見通し実験における対流圏エアロゾルの気候影響

野沢徹, 江守正多, 沼口敦, 竹村俊彦, 中島映至, 阿部彩子, 木本昌秀

大会講演予講集 77 57 - 57 2000.5

多種類のエアロゾルによる直接・間接効果を考慮した場合の全球大気海洋結合モデルを用いた気候変化実験

野沢徹, 江守正多, 沼口敦, 竹村俊彦, 中島映至, 阿部彩子, 木本昌秀

大会講演予講集 76 35 - 35 1999.11

CSU-RAMSによる東アジア領域の気候再現実験(その2)

江守正多, 野沢徹, 沼口敦, 鵜野伊津志

大会講演予講集 75 P354 1999.4

Climate numerical model and effect related to the global warming problem.Preliminary research on the integration of countermeasure evaluation numerical model.

神沢博, 野沢徹, 江守正多, 甲斐沼美紀子, 増井利彦, 森田恒幸, 原沢英夫, 高橋潔

地球環境研究総合推進費平成10年度研究成果報告集(中間報告6) 18 - 23 1999

IPCCシナリオに基づく全球大気海洋結合モデルによる気候変化実験

江守正多, 阿部彩子, 沼口敦, 野沢徹, 木本昌秀

大会講演予講集 73 150 - 150 1998.5

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