摘要
近年来的许多观测事实表明,全球大气环流的变化存在着相关性。Wallace和Gutzler发现大气环流的异常存在着五种遥相关型:太平洋北美型,西大西洋型,东大西洋型,西太平洋型和欧亚型。黄荣辉从理论和数值试验方面指出,冬季热带东太平洋海温的异常会引起中高纬度大气环流的异常。黄荣辉等人近期的研究还揭示出夏季热带西太平洋海温的异常,会在东南亚。
In this paper 5°×10° latitude-longitude grid point data of daily 500 hPa geopotential height over the Northern Hemisphere in Summer (June-August) during 1980's are used. The conclusions can be drawn as follows:1.Summer heat source anomaly of tropical western Pacific causes anomaly of summer general circulation over the Northern Hemisphere. Teleconnection of general circulation similar to PNA pattern was formed from Southeastern Asia, East Asia to North American.2.During the year of peak period of an El Nino event such as 1980, 1983 and 1987, the subtropical high of western Pacific was significantly strengthened. in summer and the ridge line and point were moved to the south and west than the normal respectively. It causes plentiful rainfall along the Chang Jiang and the Huai He river basins in summer.3. During the year of peak period in a counter-El Nino event such as 1985, the intensity of subtropical high of western Pacific in summer was near the normal, but the ridge line was located in the north of the normal as well as the ridge point withdrew intensely eastward. It causes severe drought along the Chang Jiang and the Huai He river basins in summer.
出处
《气象学报》
CSCD
北大核心
1991年第4期559-563,共5页
Acta Meteorologica Sinica
基金
国家自然科学基金
