西太平洋副热带高压脊线变化与我国汛期降水的关系  

VARIATIONS OF SUMMER RAINFALL OVER CHINA IN RELATION TO THE GEOGRAPHICAL LOCALITY OF SUBTROPICAL HIGH RIDGE OVER WEST PACIFIC

作　　者：沙万英[1] 郭其蕴[1] 

机构地区：[1]中国科学院地理研究所

出　　处：《应用气象学报》1998年第S1期32-39,共8页Journal of Applied Meteorological Science

基　　金：国家"九五"重中之重科技项目

摘　　要：利用最近４６年（１９５１～１９９６年）完整而系统的副高特征量资料和全国１６０个站降水量资料进行相关普查，得出副高脊线与汛期降水关系最好．因此，我们着重讨论了副高脊线的变化与我国汛期降水的关系．研究表明副高脊线与汛期降水的高相关集中在两个时段，即同期和副高脊线超前１年左右相关最好；从区域分布看，较大范围的高相关区主要集中在长江中游—江南、东北的东南部—华北东部、河套、黄淮—江淮的东部沿海及华南中部．同时随着副高季节性北跳，高相关区也随之北移．orrelation coefficients between monthly rainfall of 160 stations over China in summer and monthly subtropical high indexes in summer and in preceding seasons were calculated based on the data from 1951 to 1996. It is shown that the geographical locality of subtropical high ridge is closely correlated to summer rainfall variability. The high correlation coefficients fell into two time intervals in summer months of the same year and in summer months of the previous year. The geographical distribution of correlation coefficients showed that the highest correlations were found mainly from middle reach of the Changjiang River to south of it, from southeast of Northeast China to eastern North China, from middle reach of the Huanghe River to eastern littoral region of HuangheHuaihe River, and in the middle of South China. The geophraphical location of the highest correlation migrated to the north in accordance with the seasonal northward movement of the subtropical high.

关 键 词：副热带高压脊线 汛期降水 相关分析 

分 类 号：P426.6[天文地球—大气科学及气象学] P424.3