研究者詳細 - 野沢　徹

MISC - 野沢　徹

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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年

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年

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年5月

B234 地球温暖化による大気大循環の変化

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

日本流体力学会年会講演論文集 2002 268 - 269 2002年

記述言語：日本語出版者・発行元：日本流体力学会

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年5月

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年

記述言語：英語出版者・発行元：Meteorological 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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その他リンク： http://dl.ndl.go.jp/info:ndljp/pid/10611922

将来のエアロゾル分布・放射強制力及び東アジアにおける越境汚染に関するシミュレーション

竹村俊彦, 中島映至, 野沢徹, 青木一真

天気 48 ( 12 ) 929 - 930 2001年