1982—1983年强ENSO期间夏季全球低纬地区平均辐散环流分析

ANALYSIS OF THE SUMMER GLOBAL MRAN DIVERGENT CIRCULATION IN THE TROPICS DURING THE 1982-1983 ENSO EPISODE

本文分析1982—1983年强ENSO期间夏季(6—8月)全球低纬度地区平均辐散环流特征发现,在200hPa上存在3个辐散中心和3个辐合中心,它们与热带地区的大尺度纬向环流分布有密切联系。1982年夏季的辐散环流强度明显比1983年夏季的弱,这种差异与这次强ENSO期间夏季热带地区海温异常变化有关系。

An investigation is conducted of the summer (June-August)global mean divergent circulation in the tropics during the 1982-1983ENSO episode. Three divergent and three convergent centers are ob-served at the 200 hPa level, which are closely rolated to the distributionof large-scale zonal circulation in the tropics. It is found that thesummer divergent circulation in 1982 is significantly weaker than theone in 1983. This difference may have something to do with the summersea temperature anomaly in the tropics during the strong ENSO episode.