用自然正交函数展开方法对1961～1995年西南汛期(6～8月)降水大尺度变化特征进行分析，并在此基础上用典型相关分析方法研究了1～8月印度洋海温距平场与西南汛期降水场的遥相关分布特征。结果表明：西南汛期降水的地域差异显著，年际和年代际变化明显，其变化与印度洋海温变化有一定联系，分析还进一步表明，当印度洋海温呈某种特定的配置时，特别是南印度洋中西部海温的异常变化对西南汛期降水的异常分布有一定作用。揭示了印度洋海温变化在西南汛期降水异常分布中的信号现象，说明特定的印度洋海温分布可以作为西南汛期旱涝预报的信号因子。%Based on the empirical orthogonal function (EOF) ,the characteristics of large scale variations of precipitation anomaly during rainy season (from Jun to Aug)in South-West China for the period 1961～1995 is analyzed,and the teleconnection distribution charac-teristics between sea surface temperature (SST)over India Ocean and precipitation during rainy season in South-West China were studied by using the method of CCA. The results in-dicated that precipitation distribution from one area to others and interannual changes are different evidently, and its variations is related to the variations of SST over India Ocean.Otherwise,the analysis showed also that the different distribution of SST over India Ocean will affect the precipitation distribution during rainy season in South-West China. Therefore,the rainy rainfall in South-West China may be forecasted by analyzing the characteristics of SST distribution over India Ocean.
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