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DOI	10.1080/16000889.2020.1721967
	The main controls of the precipitation stable isotopes at Kathmandu, Nepal
	Adhikari N.; Gao J.; Yao T.; Yang Y.; Dai D.
发表日期	2020
ISSN	2697491
起始页码	1
结束页码	17
卷号	72 期号:1
英文摘要	Precipitation stable isotopes (2H and 18O) are adequately understood on their climate controls in the Tibetan Plateau, especially the north of Himalayas via about 30 years’ studies. However, knowledge of controls on precipitation stable isotopes in Nepal (the south of Himalayas), is still far from sufficient. This study described the intra-seasonal and annual variations of precipitation stable isotopes at Kathmandu, Nepal from 10 May 2016 to 21 September 2018 and analysed the possible controls on precipitation stable isotopes. The enriched δD and δ18O values were identified during non-monsoon season and depleted values were found during monsoon season, showing remarkable intra-seasonal characteristics of monsoon influence. The local meteoric water line suggested a strong influence of evaporation during rainfall in non-monsoon season and significant impact of non-equilibrium processes on precipitation during monsoon season. Temperature–δ18O exhibited negative correlation for overall samples and showed no significant correlation in seasonal scales, which was attributed to the influence of monsoon moisture. The positive correlation was observed between δ18O and outgoing longwave radiation (OLR) in monsoon season, suggesting the significant impact of convective activity on temporal variations of precipitation stable isotopes. During April, and May of 2016 and 2017, variation of precipitation stable isotopes are probably related with the mixing of multi-moisture combined with the westerlies transport. Our study suggested that the moisture transport processes are the main controls of precipitation stable isotopes at Kathmandu. © 2020, © 2020 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
英文关键词	Indian monsoon; Kathmandu; precipitation; stable isotopes; westerlies
语种	英语
scopus关键词	Tellus, Series B: Chemical and Physical Meteorology
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158489
作者单位	Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, CAS, Beijing, China
推荐引用方式 GB/T 7714	Adhikari N.,Gao J.,Yao T.,et al. The main controls of the precipitation stable isotopes at Kathmandu, Nepal[J]. 中国科学院青藏高原研究所,2020,72(1).
APA	Adhikari N.,Gao J.,Yao T.,Yang Y.,&Dai D..(2020).The main controls of the precipitation stable isotopes at Kathmandu, Nepal.,72(1).
MLA	Adhikari N.,et al."The main controls of the precipitation stable isotopes at Kathmandu, Nepal".72.1(2020).