General Circulation over the Northern Hemisphere in 1994 and Its Impact
General circulation features over the Northern Hemisphere in 1994 are analysed. It is shown that the subtropical high over the west Pacific is stronger than normal and extends to the west,in mid-summer it moves northward abnormally. Zonal circtilation is dominant in Eurasian 9 and Polar vortex in the Northern Hemisphere is smaller in area and weaker in strength than normal. In midlatitude of the East Asia,high pressure systems keep stable in summer,and frontal zone in westerly moves northward. At 100hpa, the South Asia high is stronger in strength, further to the north and eastward than normal. A new El Nino event is forming over the tropical Pacific. The anormaly of both the atomspheric circulation and the tropical ocean exerts a significant impact on the weather and climate in China.