| 雅鲁藏布江流域降水中氧稳定同位素的时空变化 |
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| 引用本文： | 刘忠方,田立德,姚檀栋,巩同梁,尹常亮,余武生.雅鲁藏布江流域降水中氧稳定同位素的时空变化[J].地理学报(英文版),2007,17(3). |
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| 作者姓名： | 刘忠方 田立德 姚檀栋 巩同梁 尹常亮 余武生 |
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| 作者单位： | Institute of Tibetan Plateau Research CAS，Institute of Tibetan Plateau Research，CAS，Institute of Tibetan Plateau Research，CAS，Institute of Tibetan Water Resource Reconnaissance and Designing，Key Laboratory of Cryosphere and Environment，Cold and Arid Regions Environmental and Engineering Research Institute，CAS，Institute of Tibetan Plateau Research，CAS，Beijing 100085，China，Beijing 100085，China Key Laboratory of Cryosphere and Environment，Cold and Arid Regions Environmental and Engineering Research Institute，CAS，Lanzhou 730000，China，Beijing 100085，China Key Laboratory of Cryosphere and Environment，Cold and Arid Regions Environmental and Engineering Research Institute，CAS，Lanzhou 730000，China，Lhasa 850000，China，Lanzhou 730000，China，Beijing 100085，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 precipita-tion of the Yarlung Zangbo River Basin based on the variations of δ18O in precipitation at four stations (Lhaze,Nugesha,Yangcun and Nuxia) in 2005. The results show that δ18O of pre-cipitation has distinct seasonal changes in the Yarlung Zangbo River Basin. The higher value of δ18O 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,18O of precipitation is gradually depleted. Thus,δ18O of precipitation decreases gradually from the downstream to the upstream,and the lapse rate of δ18O in precipitation is approximately 0.34‰/100m and 0.7‰/100km for the two reasons. During monsoon precipitation,spatial variation of δ18O in precipitation is dominated by the amount effect in the large scale synoptic condition.
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| 关 键 词： | Yarlung Zangbo River Basin δ18O precipitation temporal and spatial variations |
Temporal and spatial variations of δ18O in precipitation of the Yarlung Zangbo River Basin |
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| LIU Zhongfang,TIAN Lide,YAO Tandong,GONG Tongliang,YIN Changliang,YU Wusheng.Temporal and spatial variations of δ18O in precipitation of the Yarlung Zangbo River Basin[J].Journal of Geographical Sciences,2007,17(3). |
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| Authors: | LIU Zhongfang TIAN Lide YAO Tandong GONG Tongliang YIN Changliang YU Wusheng |
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| Abstract: | This paper reveals the temporal and spatial variations of stable isotope in precipitation of the Yarlung Zangbo River Basin based on the variations ofδ18O in precipitation at four stations (Lhaze, Nugesha, Yangcun and Nuxia) in 2005. The results show thatδ18O of precipitation has distinct seasonal changes in the Yarlung Zangbo River Basin. The higher value of δ18O 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, 18O of precipitation is gradually depleted. Thus, δ18O of precipitation decreases gradually from the downstream to the upstream, and the lapse rate of δ18O in precipitation is approximately 0.34%o/100m and 0.7%o/100km for the two reasons. During monsoon precipitation, spatial variation of δ18O in precipitation is dominated by the amount effect in the large scale synoptic condition. |
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| Keywords: | Yarlung Zangbo River Basin precipitation temporal and spatial variations |
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