| Origin of summer monsoon rainfall identified by δ18O in precipitation |
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| 作者姓名： | PANG Hongxi HE Yuanqing ZHANG Zhonglin LU Aigang GU Juan ZHAO Jingdong |
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| 作者单位： | [1]Key Laboratory of Cryosphere and Environment, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China [2]Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, China |
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| 基金项目： | Acknowledgements This work was supported by the National Natural Science Foundation of China （Grant Nos. 90511007, 40501014 and 90302006）, funding from CAREE, Chinese Academy of Sciences （Grant No. 2004102）, the Hundred Talents Program of Chinese Academy of Sciences （Grant No. 2004401） and the project for 0utstanding Young Scientists of the National Natural Science Foundation of China （Grant No. 40121101）. |
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| 摘 要： | A negative correlation between δ^18O in monsoon precipitation and f, the ratio of precipitable water in monsoon region to that in water source area, is hypothesized. Using the Rayleigh model, a new method for identifying origin of summer monsoon rainfall is developed based on the hypothesis. In order to validate the method, the isotopic data at New Delhi, a typical station in the southwest monsoon region, and Hong Kong, a typical station in the southeast monsoon region, were collected and analyzed for case studies. The case studies indicate that the water source areas of the monsoon rairdall at the two stations identified by the method are accordant with the general atmosphere circulation patterns. The method developed in this paper is significantly important for tracing the origin of summer monsoon precipitation.
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| 关 键 词： | 夏季季风 氧同位素 降雨量 雷利模型 |
| 收稿时间： | 2005-07-01 |
| 修稿时间： | 2005-07-012005-08-29 |
Origin of summer monsoon rainfall identified by δ18O in precipitation |
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| PANG Hongxi HE Yuanqing ZHANG Zhonglin LU Aigang GU Juan ZHAO Jingdong.Origin of summer monsoon rainfall identified by δ18O in precipitation[J].Chinese Science Bulletin,2005,50(23):2761-2764. |
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| Authors: | Pang Hongxi He Yuanqing Zhang Zhonglin Lu Aigang Gu Juan Zhao Jingdong |
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| Institution: | (1) Key Laboratory of Cryosphere and Environment, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 730000 Lanzhou, China;(2) Institute of Tibetan Plateau Research, Chinese Academy of Sciences, 100085 Beijing, China |
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| Abstract: | A negative correlation between δ18O in monsoon precipitation andf, the ratio of precipitable water in monsoon region to that in water source area, is hypothesized. Using the Rayleigh model,
a new method for identifying origin of summer monsoon rainfall is developed based on the hypothesis. In order to validate
the method, the isotopic data at New Delhi, a typical station in the southwest monsoon region, and Hong Kong, a typical station
in the southeast monsoon region, were collected and analyzed for case studies. The case studies indicate that the water source
areas of the monsoon rainfall at the two stations identified by the method are accordant with the general atmosphere circulation
patterns. The method developed in this paper is significantly important for tracing the origin of summer monsoon precipitation. |
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| Keywords: | monsoon stable isotopes origin of monsoon precipitation |
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