| Interannual and Decadal Variations of Snow Cover overQinghai-Xizang Plateau and Their Relationships to Summer Monsoon Rainfall in China |
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| 作者姓名： | Chen Lieting Wu Renguang |
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| 作者单位： | Chen Lieting (Institute of Atmospheric Physics，Chinese Academy of Sciences，Beijing 100029)Wu Renguang (Department of Meteorology，University of Hawall at Manoa，Honolulu，HI96822，USA) |
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| 摘 要： | Interannual and decadal variations of winter snow cover over the Qinghai-Xizang Plateau (QXP) are analyzed by using monthly mean snow depth data set of 60 stations over QXP for the period of 1958 through 1992. It is found that the winter snow cover over QXP bears a pronounced quasi-biennial oscillation, and it underwent an obvious decadal transition from a poor snow cover period to a rich snow cover period in the late 1970’s during the last 40 years.It is shown that the summer rainfall in the eastern China is closely associated with the winter snow cover over QXP not only in the interannual variation but also in the decadal variation. A clear relationship exists in the quasi-biennial oscillation between the summer rainfall in the northern part of North China and the southern China and the winter snow cover over QXP. Furthermore, the summer rainfall in the four climate divisions of Qinling-Daba Mountains, the Yangtze-Huaihe River Plain, the upper and lower reaches of the Yangtze River showed a remarkable transition from drought period to rainy period in the end of 1970’s, in good correspondence with the decadal transition of the winter snow cover over QXP.
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| 收稿时间： | 19 May 1999 |
Interannual and decadal variations of snow cover over Qinghai-Xizang Plateau and their relationships to summer monsoon rainfall in China |
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| Chen Lieting,Wu Renguang.Interannual and Decadal Variations of Snow Cover overQinghai-Xizang Plateau and Their Relationships to Summer Monsoon Rainfall in China[J].Advances in Atmospheric Sciences,2000,17(1):18-30. |
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| Authors: | Chen Lieting Wu Renguang |
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| Institution: | Institute of Atmospheric Physics; Chinese Academy of Sciences; Beijing 100029,Department of Meteorology; University of Hawall at Manoa; Honolulu; HI96822; USA |
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| Abstract: | Interannual and decadal variations of winter snow cover over the Qinghai-Xizang Plateau (QXP) are analyzed by using monthly mean snow depth data set of 60 stations over QXP for the period of 1958 through 1992. It is found that the winter snow cover over QXP bears a pronounced quasi-biennial oscillation. and it underwent an obvious decadal transition from a poor snow cover period to a rich snow cover period in the late 1970's during the last 40 years. It is shown that the summer rainfall in the eastern China is closely associated with the winter snow cover over QXP not only in the interannual variation but also in the decadal variation. A clear relationship exists in the quasi-biennial oscillation between the summer rainfall in the northern part of North China and the southern China and the winter snow cover over QXP. Furthermore, the summer rainfall in the four climate divisions of Qinling-Daba Mountains, the Yangtze-Huaihe River Plain, the upper and lower reaches of the Yangtze River showed a remarkable transition from drought period to rainy period in the end of 1970's, in good correspondence with the decadal transition of the winter snow cover over QXP. |
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| Keywords: | Snow cover over Qinghai-Xizang Plateau Summer monsoon rainfall in China Interannual and decadal variations |
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