河南省2002年夏季高温少雨成因

从副高特征量和500hPa高度场以及高度距平场角度，分析了2002年夏季河南省气候特征，并分析了海温、太阳黑子等特征量对夏季降水的影响。结果表明：2002年夏季副热带高压偏南，北方冷空气活动偏弱，大陆暖高压强盛发展并维持，是造成河南省夏季高温少雨的直接原因；赤道中、东太平洋维持弱的暖事件和太阳活动异常以及天文背景的影响，是造成2002年河南省夏季高温少雨的间接原因。

Climatic Causes of High Temperature and Less Rainfall over Henan in 2002 Summer

By using the grid value of characteristic quantity of subtropical high, high field of 500hPa and height anomaly field, we analyze the climatic character in Henan province in 2002 summer and explored the influences of marine temperature and sunspot on summer rainfall. It comes to conclusion that the cause of high temperature and less rainfall stays on several factors as followings: subtropical high is to the south; cool air in the north is inactive; warm high on mainland remains strong; weak warm events are maintained on the equator and East-Pacific; solar activity is abnormal; astronomical background. The first three are direct causes, while the others are indirect.