气候变化领域集成服务门户(CCPortal): Mercury distribution and variation on a high-elevation mountain glacier on the northern boundary of the Tibetan Plateau

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DOI	10.1016/j.atmosenv.2014.07.023
	Mercury distribution and variation on a high-elevation mountain glacier on the northern boundary of the Tibetan Plateau
	Huang, Jie; Kang, Shichang; Guo, Junming; Sillanpaa, Mika; Zhang, Qianggong; Qin, Xiang; Du, Wentao; Tripathee, Lekhendra
发表日期	2014
ISSN	1352-2310
EISSN	1873-2844
卷号	96
英文摘要	In July 2013, snow/ice and streamwater samples were retrieved from a high-elevation mountain glacier (Laohugou Glacier No. 12) on the northern boundary of the Tibetan Plateau and were analysed for total Hg (Hg-T). Concentration levels of Hg-T in snow samples were higher than those from the central and southern part of the Tibetan Plateau. Most of the Hg in the snow/ice was found to be associated with particulate matter. A small daily variation of Hg-T in surface snow further suggested that snow Hg on the Tibetan Plateau was less influenced by the effect of post-depositional processes such as photoreduction. The variations in Hg-T peak concentration on the vertical profiles of the snowpits indicated that settling of particulate matter and percolation of snowmelt had caused an increase in Hg concentrations with increasing depth. No positive relationship was found between Hg-T and elevation in our study region, indicating that the "altitude effect" on Hg in surface snow may only exist on extremely high-elevation glaciers. Moreover, Hg-T concentrations in the surface ice were found to be the highest observed in this glacier. With ongoing climate warming, this is of particular concern in western China as the accumulated Hg released by accelerated glacier thinning and retreat may endanger ecosystems and human health in the glacier-fed downstream regions. (C) 2014 Elsevier Ltd. All rights reserved.
关键词	Mercury Snow/ice Distribution Variation Laohugou glacier no. 12 Tibetan Plateau
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/111712
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	Huang, Jie,Kang, Shichang,Guo, Junming,et al. Mercury distribution and variation on a high-elevation mountain glacier on the northern boundary of the Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2014,96.
APA	Huang, Jie.,Kang, Shichang.,Guo, Junming.,Sillanpaa, Mika.,Zhang, Qianggong.,...&Tripathee, Lekhendra.(2014).Mercury distribution and variation on a high-elevation mountain glacier on the northern boundary of the Tibetan Plateau.ATMOSPHERIC ENVIRONMENT,96.
MLA	Huang, Jie,et al."Mercury distribution and variation on a high-elevation mountain glacier on the northern boundary of the Tibetan Plateau".ATMOSPHERIC ENVIRONMENT 96(2014).