盛夏7月500hPa月平均环流场的EOF分析

EOF ANALYSIS OF MONTHLY 500hPa HEIGHT FIELD IN JULY

使用1951—1992年共42年资料,利用自然正交函数(EOF)展开方法,对7月亚欧地区500hPa 高度场进行了分析,根据前3个特征向量及时间系数将7月月平均环流共划分为5种环流型。

Using the data of monthly 500hPa height field from 1951 to 1992,by means ofanalysis of empirical orthogonal function,the five kinds of circulation patterns overEurasia in July are obtained,indicating the major characteristics of the general circula-tion.The relationship between the coefficient of time and the precipitation over China isalso analysed.