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DOI	10.1016/j.atmosres.2014.07.030
	Seasonal variations of trace elements in precipitation at the largest city in Tibet, Lhasa
	Guo, Junming; Kang, Shichang; Huang, Jie; Zhang, Qianggong; Tripathee, Lekhendra; Sillanpaa, Mika
发表日期	2015
ISSN	0169-8095
EISSN	1873-2895
卷号	153
英文摘要	Precipitation samples were collected from March 2010 to August 2012 at an urban site in Lhasa, the capital and largest city of Tibet. The volume weighted mean (VWM) concentrations of 17 trace elements in precipitation were higher during the non-monsoon season than in the monsoon season, but inverse seasonal variations occurred for wet deposition fluxes of most of the trace elements. Concentrations for most of trace elements were negatively correlated with precipitation amount, indicating that below-cloud scavenging of trace elements was an important mechanism contributing to wet deposition of these elements. The elements Al, Sc, V, Cr, Mn, Fe, Mn, Ni, and U displayed low crustal enrichment factors (EFs), whereas Co, Cu, Zn, As, Cd Sn, Pb, and Bi showed high EF values in precipitation, suggesting that anthropogenic activities might be important contributors of these elements at Lhasa However, this present work indicates a much lower anthropogenic emission at Lhasa than in seriously polluted regions. Our study will not only provide insights for assessing the current status of the atmospheric environment in Lhasa but also enhance our understanding for updating the baseline for environmental protection over the Tibetan Plateau. (C) 2014 Elsevier B.V. All rights reserved.
关键词	Trace elements Wet deposition Seasonal variations Lhasa Tibet
学科领域	Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
来源期刊	ATMOSPHERIC RESEARCH
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111777
作者单位	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	Guo, Junming,Kang, Shichang,Huang, Jie,et al. Seasonal variations of trace elements in precipitation at the largest city in Tibet, Lhasa[J]. 中国科学院西北生态环境资源研究院,2015,153.
APA	Guo, Junming,Kang, Shichang,Huang, Jie,Zhang, Qianggong,Tripathee, Lekhendra,&Sillanpaa, Mika.(2015).Seasonal variations of trace elements in precipitation at the largest city in Tibet, Lhasa.ATMOSPHERIC RESEARCH,153.
MLA	Guo, Junming,et al."Seasonal variations of trace elements in precipitation at the largest city in Tibet, Lhasa".ATMOSPHERIC RESEARCH 153(2015).