青海省夏季降水变化特征

Variation Characteristics of Summer Precipitation in Qinghai Province

本文采用常规统计法分析青海省1960—2008年夏季6—8月降水量空间分布特征和时间变化规律,用Mann-Kendall突变检测法、经验正交函数分析(EOF)及小波分析等方法检验降水突变特征,结果表明:青海省降水总量年际变化波动明显,最高值最低值差值不大;降水在青海省呈斜板式从最高向西北部逐渐减少。

In this paper,conventional statistical method is used to analyze the spatial distribution characteristics and temporal variation law of precipitation from June to August in summer from 1960 to 2008 in Qinghai Province.Mann Kendall mutation detection method,empirical orthogonal function(EOF)and wavelet analysis are used to test the abrupt change characteristics of precipitation.The results show that the annual variation of total precipitation in Qinghai province fluctuates obviously,and the difference between the highest and lowest precipitation is small Qinghai Province is inclined plate,gradually decreasing from the highest to the northwest.