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Key drivers controlling the stable isotopes in precipitation on the leeward side of the central Himalayas
Ren, W (Ren, Wei)1,2; Yao, TD (Yao, Tandong)2; Xie, SY (Xie, Shiyou)1; Ren, W
Source PublicationATMOSPHERIC RESEARCH
2017
Volume189Issue:0Pages:134-140
DOI10.1016/j.atmosres.2017.01.020
AbstractThe 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.
Subject Area自然地理学
WOS IDWOS:000398007400012
Language英语
Indexed BySCI
KeywordTIBETAN PLATEAU SURFACE SNOW WATER-VAPOR MOISTURE EVAPORATION DELTA-O-18 SOUTH CIRCULATION EXCHANGE MIDDLE
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences ; Meteorology & Atmospheric Sciences
Cooperation Status国内
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8236
Collection图书馆
Corresponding AuthorRen, W
Affiliation1.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.
Recommended Citation
GB/T 7714
Ren, W ,Yao, TD ,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 Ren, W ,Yao, TD ,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 Ren, W ,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.
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