关键词: 南疆, 夏季高温, 气候分析

Abstract:

Based on the data of sea temperature of North Pacific，500 hPa geopotential height over the North Hemisphere and air tern-perature of Ruoqiang，Qiemo and Hetian stations during 1951—2005，the climatic variation of summer high temperature years in South-err Xinjiang and its climatic background were analyzed．Results show that the emergence of summer high temperature in this region is closely connected with the abnormal variations of atmospheric circulation over the North Hemisphere and sea tempe rature of North Pacif-ic．It is also showed that the character indices of the subtropical high over the Northern Hemisphere in the preceding October and Feb-mary have indication for summer temperature in the region．Namely，since January of each high —summer—temperature year of South-ern Xinjiang，the departure distribution of sea temperature which is high in the southwest sea area and low in the northeast has appeared in North Pacific．and often lasted until May．However，sea temperature variations of the two sea areas were diferent，in January and February，the variation is smaller in southwest sea area while bigger in the northeast，on the contrary，it’S biger in the southwest and smaller in the northeast from March to May．

Key words: Southern Xi~iang, summer high temperature, climatic analysis