春季大气环流异常对山东省夏季高温的影响

Influence of Spring Atmospheric Circulation Anomaly on Summer High Temperature in Shandong Province

摘要: 基于500 hPa月平均高度场NCEP/NCAR资料及山东省夏季高温资料，采用SVD、合成分析等统计方法，分析了春季大气环流异常对山东省夏季高温的影响。结果表明：春季500 hPa高度异常场上有三个关键区影响山东省夏季高温；春季乌拉尔阻高发展不利于山东夏季高温，欧亚高空槽春季异常对山东夏季高温影响不容忽视，欧亚地区纬向环流和亚洲地区经向环流的年代际变化与山东省夏季高温异常年代际变化有很好的对应关系。

Abstract: Based on the 500 hPa monthly mean height field NCEP/NCAR data and the summer high temperature data in Shandong Province, using SVD, synthetic analysis methods and other statistical methods, the influence of the abnormal atmospheric circulation in spring on the summer high temperature in Shandong Province was analyzed. The results show that there are three “key regions” in Spring 500 hPa geopotential height field which have an important influence on summer high temperature in Shandong; the Spring developing blocking high over Ural mountains goes against summer high temperature in Shandong. The effects of Spring high-altitude trough over Eurasia on high temperature should not be disregarded. There is a very nice corresponding relationship of inter-decadal variation between summer high temperature anomaly in Shandong Province and Eurasian Zonal Circulation and Meridional Circulation in Asia in Spring.