| NUMERICAL STUDY OF INFLUENCE OF THE SSTA IN WESTERN PACIFIC WARM POOL ON RAINFALL IN THE FIRST FLOOD PERIOD IN SOUTH CHINA |
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| 作者姓名： | 陈艺敏 钱永甫 王 汶 蒋国华 |
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| 作者单位： | Department of Atmosphere Sciences，Nanjing University，Nanjing 210093 China，Department of Atmosphere Sciences，Nanjing University，Nanjing 210093 China |
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| 基金项目： | sponsored by the NSFC key project (40233037) and the “National Key Developing Programme for Basic Science” project (2004CB418300) |
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| 摘 要： | 1 INTRODUCTION The flood period in South China (SC) lasts long and rains heavily. Its relationship with the SST in the near sea has been studied by Chinese meteorologists early. Liang1] found that the rainfall of Guangdong in warm water years of South China Sea (SCS) is more than in cold water years. Xie et al2]. analyzed the relations between the rainfall in Guangdong flood period (from April to September) and SST in northwest Pacific, and built prognostic equations for monthl…
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| 关 键 词： | CCM3 numerical simulation rainfall in the first flood period in South China SSTA abnormality in western Pacific warm pool P-σnine-layer regional climate model |
NUMERICAL STUDY OF INFLUENCE OF THE SSTA IN WESTERN PACIFIC WARM POOL ON RAINFALL IN THE FIRST FLOOD PERIOD IN SOUTH CHINA |
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| CHEN Yi-min,QIAN Yong-fu,WANG Wen and JIANG Guo-hua.NUMERICAL STUDY OF INFLUENCE OF THE SSTA IN WESTERN PACIFIC WARM POOL ON RAINFALL IN THE FIRST FLOOD PERIOD IN SOUTH CHINA[J].Journal of Tropical Meteorology,2005,11(1):86-96. |
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| Authors: | CHEN Yi-min QIAN Yong-fu WANG Wen and JIANG Guo-hua |
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| Institution: | Department of Atmosphere Sciences, Nanjing University, Nanjing 210093 China |
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| Abstract: | A brief introduction of a global atmospheric circulation model CCM3, which is used to simulate the precipitation in China, the height and the flow fields of the atmosphere, is made and the reliability of simulation is analyzed. According to the negative correlation between rainfall in the first flood period in South China (FFSC) and sea surface temperature anomalies (SSTA) in a key region in western Pacific warm pool (West Region), two sensitive experiments are designed to investigate the effects of the latter on the former and the possible physical mechanism is discussed. It is found that in cold water (warm water) years, the rainfall in South China (SC) is far more (less) than normal, while the rainfall in the middle and low reaches of the Yangtze River is relatively less (more). The best correlative area of precipitation is located in Guangdong Province. It matches the diagnostic result well. The effect of SSTA on precipitation of FFSC is realized through the abnormality of atmospheric circulation and tested by a P-σnine-layer regional climate model. Moreover, the simulated result of the P-σmodel is basically coincident with that of the CCM3. |
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| Keywords: | CCM3 numerical simulation rainfall in the first flood period in South China SSTA abnormality in western Pacific warm pool P-σnine-layer regional climate model |
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