THE SUMMER ANOMALY LOW TEMPERATURE OF CHINESE NORTHEAST REGION IN CONNECTION WITH THE ACTIVITY OF 100 MB LEVEL POLAR VORTEX AND SOUTHASIA HIGH PRESSURE

In this Paper, we had computed the geopotential anomaly field and the latitude geostrophic wind velocity of north hemispher 100 mb level. It was discussed that the activity of polar vortex and southasia high has a connection with the summer low temperature of Chinese Northeast Region.Following conclusions were obtained: 1.The anomaly cold summer of Chinese Northeast Region is becomed by the weak suthasia high and the usual activity of polar cold air in middle latitude. 2.Winter (Nov-Feb.)100 cob level pacific high has a connection with sucomer southasia high.The correlation coefficient of them is 0.62. 3.It is show that there are three kinds of frequency graphs of five months (Jan.-May.)100 cob level polar vortex: a) When the arctic vortex is always activity in the north polar region, the summer temperature of Chinese Northeast Region is warm. b) When the arctic vortex is always activity in Eurasia, the sucomer temperature of Chinese Northeast Region is cold irrespective of intensity or weak the southasia high. c) When there are two frequency centres of frequency graph of five months (Jan.-May.)arctic vortex located specifically at Eurasia and north America, the summer temperature of Chinese Northeast Region is determined by high or low of southasia high. They are correlation to each other.4.The summer temperature of northeast region has a connection with winter snow-cover Eurasia area and sonwfall of Chinghai-Tibet plateau. They are anti-correlations each other.