Origin of summer monsoon rainfall identified by δ18O in precipitation

A negative correlation between δ18O 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 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.

作 者： PANG Hongxi HE Yuanqing ZHANG Zhonglin LU Aigang GU Juan ZHAO Jingdong   作者單位： PANG Hongxi,ZHANG Zhonglin,LU Aigang,GU Juan,ZHAO Jingdong(Key Laboratory of Cryosphere and Environment, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China)

HE Yuanqing(Key Laboratory of Cryosphere and Environment, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;Institute of Tibetan Plateau Research, Chinese Academy of Sciences,Beijing 100085, China) 

刊 名： 科學(xué)通報(bào)（英文版）  SCI 英文刊名： CHINESE SCIENCE BULLETIN  年，卷(期)： 2005 50(23)  分類(lèi)號(hào)： P4  關(guān)鍵詞： monsoon   stable isotopes   origin of monsoon precipitation  

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