摘要
计算了1951—1990年冬半年逐月以及冬季的PNA、WA、WP、EA、EU型的遥相关强度指数。在此基础上,研究了它们的气候变化特征以及这5个遥相关型强度指数与厄尔尼诺的关系。指出,厄尔尼诺发展的盛期(冬季),以北半球西太平洋型(WP)明显偏弱为主要特征,其次才是太平洋北美型(PNA)偏强。1991年发生的一次厄尔尼诺,在盛期是弱PNA型,弱WP型。此外,还研究了遥相关强度指数用于天气预报的问题。
In this study,the monthly and seasonal telecorrelation intensity indices of the Pacific/North American (PNA), Western Atlantic (WA), Western Pacific (WP), Eastern Atlantic(EA)and Eurasian(EU) patterns for the period from1951 through 1990 are calculated. On this basis,their climatic variations and the relation between the five telecorrelation intensity indices and the El Nino events are examined. It is noted that when El Nino is at its mature stage(winter),the weak WP pattern is mainly characteristic of the circulation and the strong PNA pattern is the next. The mature stage of El Nino occurring in 1991 is found to be characterized by the weak PNA and WP patterns. Besides,the application of the telecorrelation intensity indices to weather prediction is discussed.
出处
《南京气象学院学报》
CSCD
1993年第2期131-138,共8页
Journal of Nanjing Institute of Meteorology
基金
气象院校基金
气候基金
关键词
遥相关
厄尔尼诺
年际变化
强度
telecorrelation
El Nino
drough-flood teleconnection index
intertannual variation
