( 2 ) sxsp anomaly is closely related to the abnormity of 500hpa geopotential height field over the east of ural and yakutsk area , western ridge point and area of subtropical high , the cold air abnormity from north of china and the position of upper level westerly jet over east asia ( 2 )三峡库区夏季降水异常与大气环流异常密切相关：与500hpa乌拉尔山以东高度场异常、雅库茨克以东高度场异常、副热带高压面积及西伸脊点、北方冷空气异常、 200hpa东亚高空西风急流位置异常偏南(偏北)密切相关。
