Comparative Research on the Precipitation Variation in the Regions Susceptible to Global Climate Change in China——A case study in Heilongjiang,Xinjiang and Tibet
中国气候变化敏感区降水量区域对比——以黑龙江、新疆和西藏三省区为例

The study on regional response to global climatic changes in China has arouse concerns while the research on global climatic change has been one of major issues in current natural science over the past 40 years. According to the daily precipitation data from 93 national meteorological stations from 1961 to 2008, the comparative studies were made on the variation process and the characteristics of both annual precipitation and seasonal precipitation among Heilongjiang, Xinjiang and Tibet. Firstly, the annual precipitation of Heilongjiang is decreasing gradually while that of Xinjiang and Tibet is increasing, especially after 1995. The increasing tendencies of Xinjiang and Tibet are very instinct. Secondly, the growth is different although the precipitation of the three provincial units all have increasing trends in winter and spring. Xinjiang has the largest growth, followed by Heilongjiang, and Tibet has the smallest increase in spring, and the largest increase in winter. But the changing tendencies are not instinct. Thirdly, the variation trends of the rainfall in summer and autumn are the same as the annual precipitation with slight decrease in Heilongjiang and slight increase in Xinjiang and Tibet. The increasing tendencies are very instinct. Fourthly, 61.5% of the meteorological stations in Heilongjiang show obvious changes in winter and 64.7% of the stations in Tibet have such changes in spring, while 20 of the stations in Xinjiang present instinct changing tendencies in annual precipitation. Fifthly, both annual and seasonal precipitations have obvious changes in Xinjiang and Heilongjiang and are relatively stable in Tibet.