我国东部持续性暴雨水汽输送特征的比较分析  

Comparison of water vapor transport for the persistent heavy rainfall events over eastern China

作　　者：陈明亚[1] 汤燕冰[1] 郭巧慧 

机构地区：[1]浙江大学地球科学系,浙江杭州310027 [2]洪家国家基准气候站,浙江台州318015

出　　处：《浙江大学学报（理学版）》2014年第3期338-347,共10页Journal of Zhejiang University（Science Edition）

基　　金：国家自然科学基金资助项目(41075033)

摘　　要：运用基于拉格朗日方法的气流轨迹模式(HYSPLIT),并结合欧拉方法,分析了江淮、江南和华南3个不同区域多个PHR过程期间的水汽通道和水汽输送特征以及通道建立和维持的天气学条件.不同区域PHR过程发生时,水汽通道及其贡献率、异常环流特征等都不同,且这些差异主要集中在南海和西太平洋地区.从水汽收支来看,华南与另外2个区域的差异较大.从水汽通道和异常环流的角度上看,江南与另外2个区域的差异较大.By using the HYSPLIT model, the water vapor transport of several most severe persistent heavy rainfall （PHR） events over Yangtze River-Huaihe River Valley（YH）, South of the Yangtze River（YS） and Southeast Coastal Area（ES） was analyzed. Also, the characteristics of vapor transport and the large scale background, which is responsible for the establishment and maintenance of the vapor passages, were analyzed. The results reveal that there are many differences which are mainly concentrated in the Western Pacific and the South China Sea. The vapor budget for the PHR events occurring in ES is significantly different from those in YH and YS. The vapor passages and related abnormal background for the PHR events occurring in YS possess distinctive characteristics.

关 键 词：持续性暴雨过程 水汽输送通道 异常环流 

分 类 号：P426[天文地球—大气科学及气象学]