Numerical Simulation of the 1999 Yangtze River Valley Heavy Rainfall Including Sensitivety Experiments with Different SS

With the IAP/LASG GOALS model,the heavy rainfall of the summer of 1999 in the Yangtze River valley is simulated with observational sea surface temperature (SST).Comparing the simulations of 1999 with the corresponding ones of 1998 and the sensitivity experiments with different sea surface temperature anomalies (SSTA) at different ocean regions,the relationships between the floods in the Yangtze River valley and the SSTA in the Pacific and Indian Oceans are studied.The results show that the positive SSTAin the tropical Indian Ocean are a major contributor to the heavy rainfall and may be a very important index to predict the heavy rainfall over the Yangtze River valley in the summer.The simulations also show that the relationships between the SSTA in the tropical eastern Pacific and the heavy rainfall in the Yangtze River valley are very complicated,and the heavy rainfall in the Yangtze River valley can occur in both a decaying and an intensifying El Ninio event and also in a La Nina event.However,the different SSTA of different periods in the above three cases play different parts.

作 者： 郭裕福 王嘉 趙彥   作者單位： LASG,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029  刊 名： 大氣科學進展(英文版)  ISTIC SCI 英文刊名： ADVANCES IN ATMOSPHERIC SCIENCES  年，卷(期)： 2004 21(1)  分類號：   關鍵詞： Yangtze River valley   heavy rainfall   sea surface temperature anomaly   numerical simulation  

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