The Study on Temperature Climatic Change of South China in Spring

Based on the data of monthly mean temperature of Feb. to Apr. from 1951 to 1995 in three provinces of South China, the characteristic of low temperature during spring in South China is studied. Six serious low temperature years include 1957, 1968, 1969, 1984, 1985 and 1988. The low temperature in 1968 is the most serious. Serious low temperature is mainly in March and April. Low temperature is more frequent in Fujian and more serious in Guangxi. There is an obvious phase in interannual change of low temperature. The 80′s low temperature is more frequent, the 90′s is least, and others are normal. In years of serious spring low and high temperature years, there is remarkable difference between the mid high latitudes′ circulation of Asia, the subtropical high of western Pacific, and the SST of tropic Pacific. The close relation is obvious between Spring's low temperature of South China and Asia′s polar vortex, North edge of subtropical high in western Pacific, and the SST of warm pool in the Pacific.

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