Key drivers controlling the stable isotopes in precipitation on the leeward side of the central Himalayas
文献类型：期刊论文
| 作者 | Yao, TD (Yao, Tandong)2; Ren, W (Ren, Wei)1,2; Xie, SY (Xie, Shiyou)1; Ren, W |
| 刊名 | ATMOSPHERIC RESEARCH
 |
| 出版日期 | 2017 |
| 卷号 | 189期号:0页码:134-140 |
| 关键词 | TIBETAN PLATEAU SURFACE SNOW WATER-VAPOR MOISTURE EVAPORATION DELTA-O-18 SOUTH CIRCULATION EXCHANGE MIDDLE |
| DOI | 10.1016/j.atmosres.2017.01.020 |
| 文献子类 | Article |
| 英文摘要 | The Himalayas, as a barrier to the monsoonal moisture transport, cause an arid climate on the leeward side. This study investigates the mechanisms of isotopic variations in precipitation on the leeward side of the central Himalayas. Data of Xigaze, which is just north of the central Himalayas, suggest precipitation falls overwhelmingly in the summer monsoon season and subcloud evaporation plays an important role in altering the stable isotopes in precipitation due to the arid climate. Precipitation at Xigaze demonstrates a significant isotopic amount effect, whereby there is a significantly negative correlation between rainfall amount and delta O-18. Such a result is found to partly arise from the effect of subcloud evaporation, as reflected by increasing evaporative signatures (higher delta O-18 but lower d-excess (d-excess = delta D-8 delta O-18)) in rainfall with decreasing rainfall amount. Spatially, a pseud-altitude effect on precipitation delta O-18 and d-excess is observed on the leeward side of the central Himalayas. Lower d-excess but higher delta O-18 in precipitation are found at Xigaze than at Tingri, and this is likely caused by the stronger subcloud evaporation at the lower-altitude site of Xigaze due to its longer descent distance from the cloud base to the ground rather than the rain out process. Additionally, a synoptic survey of streamwaters across the central Himalayas helps to confirm that the spatial variation in isotopic values of precipitation is closely related to the difference in moisture source between windward and leeward sides and the degree of subcloud evaporation on the leeward side. These findings augment our understanding of local-to regional-scale hydroclimate in the central Himalayas. (C) 2017 Elsevier B.V. All rights reserved. |
| 学科主题 | 自然地理学 |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000398007400012 |
| 源URL | [http://ir.itpcas.ac.cn/handle/131C11/8236]  |
| 专题 | 青藏高原研究所_图书馆 |
| 通讯作者 | Ren, W |
| 作者单位 | 1.Southwest Univ, Sch Geog Sci, Chongqing 400715, Peoples R China. 2.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Yao, TD ,Ren, W ,Xie, SY ,et al. Key drivers controlling the stable isotopes in precipitation on the leeward side of the central Himalayas[J]. ATMOSPHERIC RESEARCH,2017,189(0):134-140. |
| APA | Yao, TD ,Ren, W ,Xie, SY ,&Ren, W.(2017).Key drivers controlling the stable isotopes in precipitation on the leeward side of the central Himalayas.ATMOSPHERIC RESEARCH,189(0),134-140. |
| MLA | Yao, TD ,et al."Key drivers controlling the stable isotopes in precipitation on the leeward side of the central Himalayas".ATMOSPHERIC RESEARCH 189.0(2017):134-140. |
入库方式： OAI收割
来源：青藏高原研究所
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