我国初夏降水的短期气候变化和成因分析

我国６月份的降水趋势按大范围多雨区的分布位置可以分为三种类型：北方类，长江类和华南类。这种不同的降水分布型与亚洲地区西风环流，西太平洋副高以及印缅纸槽等环流系统的变化有关。分析表明，近４０年来６月降水分布型存在着年代际的气候振动，他们可能是大气及海温的短期气候变化的结果。

The Short-term Climatic Change of Precipitation and Its Formation Cause in Early Summer in China

Distributions of large rain regions and precipitation tendency of the whole country in June can be divided into three types: North China type,Changjiang type and South China type. Such distributions of precipitation types associate with Westly circulation change and position in Asia and West Pacific Subtropical high and Indian-Burma low trough. The analysis suggests that the precipitation types in June is related to climatic oscillation of a adecade in recent forty years. It may be associated with influences of atmospheric circulation as well as short-term climatic change of SST.