山西省秋季降水区划及变化规律

Study on the Regionalization and Change Laws of Autumn Rainfall in Shanxi Province

采用主成分（EOF）、旋转主成分分析（REOF）、小波分析方法,对山西省1960～2004年秋季降水标准化距平场进行分区,并对秋季降水异常的空间分布特征、时间变化规律进行分析。结果表明：山西省秋季降水的主要空间异常型表现为全省一致的多雨或少雨型,这是山西省秋季降水异常的主要特征。降水异常区域大致可划分为3个区,即北部区、中部区、南部区。各异常区秋季降水都存在10年以上长周期和3～9年短周期振荡,但其显著周期及其年代变化差异较大。

Using empirical orthogonal function （EOF）, rotated empirical orthogonal function （REOF）and wavelet analysis method, the standardized autumn rainfall field in Shanxi during 1960 - 2004 was divided. And the spatial distribution characteristics and the time change laws of anturmn rainfall anomaly were analyzed. The results showed that the main spatial anomaly of autumn rainfall in Shanxi were rainy type and rainless type in the whole province, which was the main characteristics of autumn rainfall anomaly in Shared. The abnormal regions of antumn rainfall could be divided into 3 regions, including north region, middle re, on and south re, on. The autumn rainfall in each abnormal region has a long periodic oscillation （more than 10 years） and a short periodic oscillation （3- 9 years）, but their significant period and yearly change difference were greater.