不同積云對流參數(shù)化方案對中國東部降水模擬的對比分析

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不同積云對流參數(shù)化方案對中國東部降水模擬的對比分析
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中圖分類號:P426.61
基金項目:國家自然科學(xué)基金資助項目

Effects of cumulus convective parameterization on the precipitation simulation over Eastern China with P-σRCM9 regional climate model

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本文將目前國際上氣候模式中應(yīng)用比較廣泛的三種積云對流參數(shù)化方案引入到P-σRCM9區(qū)域氣候模式中,并考察了不同積云對流參數(shù)化方案對P-σRCM9區(qū)域氣候模式模擬中國降水性能的影響.分析發(fā)現(xiàn)四種積云對流參數(shù)化方案(包括原方案)下模擬的積云對流加熱率基本上都呈現(xiàn)出單峰特征,且加熱峰值出現(xiàn)在對流層中低層.并發(fā)現(xiàn)積云對流參數(shù)化方案對冬季降水平均場和年際變率模擬的影響較小,而對夏季降水模擬的影響更加重要.同時注意到Kuo方案和Anthes-Kuo方案模擬的冬、夏季降水平均場和年際變率均較其他兩個方案更接近觀測.

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Three cumulus convective parameterizations which are comprehensively applied in international climate models at present have been introduced to P-σRCM9 regional climate model, and the effects of each cumulus convective parameterization on the P-σRCM9s performance in simulating the precipitation over China have been examined in this paper. It is shown that the simulated cumulus convective heating rates under the four cumulus convective parameterizations basically have one peak and the peaks appear in mid-lower troposphere. It is also shown that cumulus convective parameterization has little effect on the P-σRCM9s performance in simulating the climatic mean precipitation and precipitation interannual variability, but it has significant effect on simulating the precipitation in summer. Meanwhile, it is noted that the precipitation mean fields and interannual variation in summer and winter simulated with Kuo and Anthes-Kuo schemes are closer to the observation than other two cumulus convective schemes.

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顧茗,黃安寧.不同積云對流參數(shù)化方案對中國東部降水模擬的對比分析.氣象科學(xué),2008,(5):488-493 Gu Ming, Huang Anning. Effects of cumulus convective parameterization on the precipitation simulation over Eastern China with P-σRCM9 regional climate model. Journal of the Meteorological Sciences,2008,(5):488-493

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收稿日期:2007-10-01
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