关键词：
盛夏降水;时空分布;西太平洋副热带高压;极涡;海温;辽宁省
摘 要：
利用辽宁省52个测站,1961—2014年7月20日至8月30日逐日降水量资料,采用EOF分析、合成分析、相关分析等方法,对盛夏辽宁降水的空间异常特征及时间变化规律进行诊断研究,并对造成辽宁盛夏降水空间分布异常的影响因子进行系统分析。结果表明:从气候平均角度看,辽宁盛夏降水存在3次变化过程,这3次过程较好地对应了西太平洋副热带高压第2次北跳及南撤的过程;辽宁盛夏降水的空间异常分布既有全区一致的分布,也存在着东西反向变化的特点;极涡的位置、不同的水汽输送路径及不同的海温关键区是造成不同降水空间分布的主要影响因子。
译 名：
Analysis on Characteristics of Spatial and Temporal Distributions of Midsummer Precipitation and Its Influencing Factors in Liaoning Province
作 者：
LI Fei;LIN Rong;Shenyang Regional Climate Center in Liaoning Province;
关键词：
midsummer precipitation;;spatial and temporal distributions;;WPSH;;polar vortex;;sea surface temperature;;Liaoning Province
摘 要：
Using the daily precipitation of 52 stations in Liaoning Province from July 20 to August 30 during 1961-2014,the characteristics of spatial and temporal distributions of midsummer precipitation and its controlling factors were analyzed by EOF method,synthetic analysis,correlation analysis,etc. Results showed that midsummer precipitation in Liaoning Province changed three times,these three changes were corresponding to the second north jump and the southward retreat of WPSH.The anomalies distribution of spatial and temporal distributions of midsummer precipitation showed a characteristic of coherence and reverse of north and south.The position of polar vortex,different water vapor transport and SST key region were the important factors resulting in different spatial distribution of precipitation.
