Temporal and spatial variations of δ18O in precipitation of the Yarlung Zangbo River Basin

被引：0
作者：
Zhongfang Liu
Lide Tian
Tandong Yao
Tongliang Gong
Changliang Yin
Wusheng Yu
机构：
[1] CAS,Institute of Tibetan Plateau Research
[2] CAS,Key Laboratory of Cryosphere and Environment, Cold and Arid Regions Environmental and Engineering Research Institute
[3] Institute of Tibetan Water Resource Reconnaissance and Designing,undefined
来源：
Journal of Geographical Sciences | 2007年 / 17卷
关键词：
Yarlung Zangbo River Basin; δ; O; precipitation; temporal and spatial variations;
D O I：
暂无
中图分类号：
学科分类号：
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 δ18O in precipitation at four stations (Lhaze, Nugesha, Yangcun and Nuxia) in 2005. The results show that δ18O 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‰/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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页码：317 / 326
页数：9
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