| Temporal and spatial variations of δ^18O in precipitation of the Yarlung Zangbo River Basin |
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| 作者姓名： | LIU Zhongfang TIAN Lide YAO Tandong GONG Tongliang YIN Changliang YU Wusheng |
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| 作者单位： | [1]Institute of Tibetan Plateau Research, CAS, Beijing 100085, China [2]Key Laboratory of Cryosphere and Environment, Cold and Arid Regions Environmental and Engineering Research Institute, CAS, Lanzhou 730000, China [3]Institute of Tibetan Water Resource Reconnaissance and Designing, Lhasa 850000, China |
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| 基金项目： | National Natural Science Foundation of China, No.40121101; No.40671043; No.40571039; National Basic Research Program of China, No.2005CB422002; Knowledge Innovation Program of the Chinese Academy of Sciences, No.KZCX3- SW-339 |
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| 摘 要： | This paper reveals the temporal and spatial variations of stable isotope in precipitation of the Yarlung Zangbo River Basin based on the variations of δ^18O in precipitation at four stations （Lhaze, Nugesha, Yangcun and Nuxia） in 2005. The results show that δ^18O of precipitation has distinct seasonal changes in the Yarlung Zangbo River Basin. The higher value of δ^18O occurs in spring prior to monsoon precipitation, and the lower value occurs during monsoon precipitation. From the spatial variations, with the altitude-effect and rainout process during moisture transport along the Yarlung Zangbo River Valley, δ^18O of precipitation is gradually depleted. Thus, δ^18O of precipitation decreases gradually from the downstream to the upstream, and the lapse rate of δ^18O in precipitation is approximately 0.34‰/100m and 0.7%J‰/100km for the two reasons. During monsoon precipitation, spatial variation of δ^18O in precipitation is dominated by the amount effect in the large scale synoptic condition.
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| 关 键 词： | 雅鲁藏布江盆地 时空变换 降水 δ^18O |
| 收稿时间： | 28 October 2007 |
| 修稿时间： | 2007-03-282007-04-30 |
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