Seasonal variations of stable isotope in precipitation and moisture transport at Yushu,eastern Tibetan Plateau

查看全文 作　　者：TIAN [1,2]LiDe;MA [1]LingLong;YU [1]WuSheng;LIU [1]ZhongFang;YIN [2]ChangLiang;ZHAO [1]ZhongPing;TANG [1]Wei;WANG [2]Yu

机构地区：[1]Laboratory of Tibetan Environment Changes and Land Surface Processes,Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100085,China;[2]State Key Laboratory of Cryosphere Sciences,Chinese Academy of Sciences,Lanzhou 730000,China

出　　处：《Science China Earth Sciences》索引2008年第51卷第8期,共8页

基　　金：the National Basic Research Program of China (Grant No.2005CB422002);National Natural Science Foundation of China (Grand Nos.40671043,40571039 and 40121101) 摘　　要：Precipitation δ 18O at Yushu, eastern Tibetan Plateau, shows strong fluctuation and lack of clear seasonality. The seasonal pattern of precipitation stable isotope at Yushu is apparently different from either that of the southwest monsoon region to the south or that of the inland region to the north. This different seasonal pattern probably reflects the shift of different moisture sources. In this paper, we present the spatial comparison of the seasonal patterns of precipitation δ 18O, and calculate the moisture transport flux by using the NCAR/NCEP reanalysis data. This allows us to discuss the relation between moisture transport flux and precipitation δ 18O. This study shows that both the southwest monsoon from south and inland air mass transport from north affected the seasonal precipitation δ 18O at Yushu, eastern Tibetan Plateau. Southwest monsoon brings the main part of the moisture, but southwest transport flux is weaker than in the southern part of the Tibetan Plateau. However, contribution of the inland moisture from north or local evaporation moisture is enhanced. The combined effect is the strong fluctuation of summer precipitation δ 18O at Yushu and comparatively poor seasonality. 关键词：TIBETAN Plateau YUSHU PRECIPITATION stable ISOTOPE moisture transport

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Seasonal variations of stable isotope in precipitation and moisture transport at Yushu,eastern Tibetan Plateau

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