夏季风期间我国候降水的分析

本文根据1966—1975,5—9月候降水资料,对夏季风期间我国候降水的区域分布及季节变化进行分析,主要结果如下:1.候平均10毫米等雨量线的南北位移,随着夏季风进退而变化,此线在7—8月位置与夏季风北界基本一致。2.大雨区自南向北位移,只有两个时段明显,7月1候以前大雨区位于30°N以南,7月5候大雨区北移至40°N,这种现象仅在我国东部地区明显,西部地区不明显。3.根据我国各地区候降水分布特征,可将降水分为五个类型。

ANALYSIS OF PENTAD RAINFALL DURING SUMMER MONSOON OVER CHINA

In this paper, by using the Pentad rainfall data from 1966-1975, May-September for 121 stations in China to analyse the seasonal change of Pentad rainfall, major results are summarized as follows.1. The location of Pentad mean rainfall 10mm isohyet from July to August agrees with the Northern limit of summer monsoon.2. In China, large rain region moving from South to North is very obri-ous only in Eastern China, but it is not obvious in Western China.3. According to Pentad rainfall distribution in China, its Pattern may be divided into five types.