INTERANNUAL CHANGE IN TELECONNECTIONS OF GENERAL CIRCULATION IN SUMMER DURING 1980’S OVER THE NORTHERN HEMISPHERE

In this paper 5°×100 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-E1 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.