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DOI	10.1016/j.atmosenv.2014.06.043
	Concentrations of trace elements in wet deposition over the central Himalayas, Nepal
	Tripathee, Lekhendra; Kang, Shichang; Huang, Jie; Sharma, Chhatra Mani; Sillanpaa, Mika; Guo, Junming; Paudyal, Rukumesh
发表日期	2014
ISSN	1352-2310
EISSN	1873-2844
卷号	95
英文摘要	Atmospheric pollutants transported from south Asia may impose a serious impact on human and ecosystem health in the central Himalayan region, Nepal. In order to investigate trace elements in atmospheric wet deposition in the southern slope of the Himalayas, precipitation samples were collected for over a year from four stations: Kathmandu (1314 m.a.s.l), Dhunche (2065 m.a.s.l), Dimsa (3078 m.a.s.l) and Gosainkunda (4417 m.a.s.l) characterized as urban, semi-urban, rural or remote site, respectively. A total of 221 samples were collected and concentrations of 10 trace elements (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, Cd, and Pb) were examined. The highest concentrations of elements were found at urban site (Kathmandu) and lowest at remote site (Gosainkunda). The seasonal differences of elemental concentrations in Kathmandu was not clear between monsoon and non-monsoon seasons as local sources predominated over regional sources. On the contrary, the other three sites showed a distinct seasonal variation with higher loadings of trace elements during non-monsoon and lower during monsoon. EFs calculations at all sites showed that most of elements (Cr, Co, Ni, Cu, Zn, Cd and Pb) were from anthropogenic sources and some (Al, Fe and Mn) were originated from crustal sources. Furthermore, principal component analysis (PCA) also indicated that the precipitation chemistry was mostly influenced by crustal and anthropogenic sources in Nepalese Himalayas. The result from the present study is an indication that long-range transport of pollutants has a significant impact on the high altitude remote areas in the central Himalayan regions. (C) 2014 Elsevier Ltd. All rights reserved.
关键词	Trace elements Seasonal variation Wet deposition Central Himalayas Nepal
学科领域	Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences ; Meteorology & Atmospheric Sciences
来源期刊	ATMOSPHERIC ENVIRONMENT
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/111713
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	Tripathee, Lekhendra,Kang, Shichang,Huang, Jie,et al. Concentrations of trace elements in wet deposition over the central Himalayas, Nepal[J]. 中国科学院西北生态环境资源研究院,2014,95.
APA	Tripathee, Lekhendra.,Kang, Shichang.,Huang, Jie.,Sharma, Chhatra Mani.,Sillanpaa, Mika.,...&Paudyal, Rukumesh.(2014).Concentrations of trace elements in wet deposition over the central Himalayas, Nepal.ATMOSPHERIC ENVIRONMENT,95.
MLA	Tripathee, Lekhendra,et al."Concentrations of trace elements in wet deposition over the central Himalayas, Nepal".ATMOSPHERIC ENVIRONMENT 95(2014).