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4-PHASE CLIMATE CHANGE FEATURES IN THE LAST 100 YEARS OVER CHINA

Shi Neng(Nanjing Institute of Meteorology, Nanjing,210044)Chen Jiaqi (Manjing Geogrophical and Lake Research institute.Academia Sinica. Nanjing, 210008)Tu Qipu (Nanjing Institute Institute of Meteorology Nanjing, 210044)  
n this study, the climate trend of the annual average air temperature and total annual rainfall in China in the present century has been examined. It is noted that the Northwest.the North China have become notably warmer this century but the rainfall trend has not been evident. mainly negative. In the 1980s China's rainfall and temperature showed noticeable regional features f warm and dry in North China, cold and dry in the Southwest.warm and wet in the Northeast area, cold and wet in the middle-lower reaches of the Changjing River.Besides. the 4-phase climate features and differences of this century have been studied.It is found that on the scale of tens of years there was considerably less rainfall in most of China in the warm background than in the cold background. The increase of temperature which started from the 1970's was mainly experienced in the Northwest and Northeast,while in the southen part of the Huanghe River the temperature increase did not even reach the level of the 1940' s.The corresponding rainfall feature is that most of the areas experienced much less rainfall except in the south of the Huaihe River and over reaches of the Changjiang and Huaihe Revers.
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