热带地区流场异常与江淮特大暴雨成因的研究  

A STUDY ON THE RELATIONSHIP BETWEEN ANOMALOUS FLOW FIELDS IN TROPICS WITH TORRENTIAL RAINFALL OCCURRED OVER EASTERN CHINA

作　　者：王文东[1] 杨祖芳[1] 何立富[1] 

机构地区：[1]国家气象中心

出　　处：《海洋预报》1994年第1期15-21,共7页Marine Forecasts

基　　金：国家气象局85重点研究课题的资助

摘　　要：本文通过计算和对比分析，得到１９９１年春、夏江淮地区特大暴雨形成的五个基本特征：西北太平洋上副高显著偏西、偏北；较弱的西南季风与东南气流汇合成强西南气流伸向江淮地区；偏东风与强西南风形成的辐合带在江淮地区维持；江淮地区对流层中下部为强上升运动、上部为辐散；１３０°Ｅ附近南半球向北半球的较强越赤道气流持续。Five basic features causing the torrential rain over eastern China durings late spring and early summer in 1991 are shown based on the compution and analysis,they are:(1)Subtropic high located wester and norther;(2)Strong southwester extending to eastern China, was formed by combining weaker southwest monsoon and southeast flow;(3)convergence zone exsisting continuously over eastern China,was formed by conbining easterly and strong southwesterly;(4)strong ascending motion occurred in middle and lower troposphere and divergence appeared in the upper over eastern China; (5)Stronger cross-equator flow insisted near 130°E.

关 键 词：流场异常 暴雨 成因 热带地区 

分 类 号：P426.62[天文地球—大气科学及气象学]