夏季北半球500hPa月平均场遥相关型及其与我国季风降水异常的关系  

NORTHERN SUMMER 500hPa MONTHLY MEAN FIELDTELECONNECTION PATTERNS AND ITS RELATION TO MONSOON RAINFALL ANOMALY IN CHINA

作　　者：施能[1] 朱乾根[1] 古文保[1] 黄静[1] 

机构地区：[1]南京气象学院气象系

出　　处：《南京气象学院学报》1994年第1期1-10,共10页Journal of Nanjing Institute of Meteorology

基　　金：国家基础性研究重大关键项目资助

摘　　要：用一点相关法计算了盛夏北半球５００ｈＰａ遥相关型。得到７月份北半球存在７个遥相关型，８月份有６个遥相关型。确定了它们的中心，计算了各遥相关型的历年强度指数（１９５１～１９９０）．研究了它们的年际变化、月际变化。指出７月份的东亚太平洋型（ＥＡＰ）、北美东西遥相关型（ＮＡＥＷ）；８月份的ＥＡＰ型、欧亚型（ＥＵ）与我国盛夏季风降水关系密切。１９９１年夏季发生的弱ＥＡＰ型是江淮流域大涝的一个重要原因。With the one point correlation method.calculations are made for mid summer500hPa teleconnection patterns,revealing that there exist seven in July and six in Augustwith their centers located and their yearly intensity indices(1951～1990)calculated. The in-terannual and intermonthly variations are examined. It is shown that the East Asian/Pacific(EAP)and Northern American East/West(NAEW)pattern in July and the EAP and Eurasian(EU)patterns in August are closely related to mid summer monsoon rainfall in China. Theweak EAP in 1991 is an important factor of the severe flooding over Jianghuai Valley of that year.

关 键 词：夏季 遥相关型 降水异常 季风 

分 类 号：P434[天文地球—大气科学及气象学]