摘要
A negative correlation between δ 18O in mon-soon 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 ori-gin 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 pat-terns. The method developed in this paper is significantly important for tracing the origin of summer monsoon pre-cipitation.
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.
基金
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)
the project for Outstanding Young Scientists of the National Natural Science Foundation of China(Grant No.40121101).
关键词
夏季季风
氧同位素
降雨量
雷利模型
monsoon, stable isotopes, origin of monsoon precipitation
作者简介
Correspondence should be addressed to Pang Hongxi （email： phx_anu@163.com）
