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学科主题: 地理学::自然地理学
题名: Insights into mercury deposition and spatiotemporal variation in the glacier and melt water from the central Tibetan Plateau
作者: Paudyal, R (Paudyal, Rukumesh)1, 4, 5; Kang, SC (Kang, Shichang)1, 3, 5; Huang, J (Huang, Jie)2, 3; Tripathee, L (Tripathee, Lekhendra)1, 4; Zhang, QG (Zhang, Qianggong)2, 3; Li, XF (Li, Xiaofei)1, 6; Guo, JM (Guo, Junming)1; Sun, SW (Sun, Shiwei)1, 5; He, XB (He, Xiaobo)1, 6; Sillanpaa, M (Sillanpaa, Mika)7
通讯作者: Kang, SC
关键词: ICE CORE ; SPATIAL-DISTRIBUTION ; CLIMATE-CHANGE ; SNOW ; SPECIATION ; CHINA ; RIVER ; ACCUMULATION ; ATMOSPHERE ; TRANSPORT
刊名: SCIENCE OF THE TOTAL ENVIRONMENT
发表日期: 2017
DOI: 10.1016/j.scitotenv.2017.05.145
卷: 599, 期:0, 页:2046-2053
收录类别: SCI
合作性质: 国际
文章类型: Article
类目[WOS]: Environmental Sciences ; Environmental Sciences & Ecology
研究领域[WOS]: Environmental Sciences & Ecology
英文摘要: Long-term monitoring of global pollutant such as Mercury (Hg) in the cryosphere is very essential for understanding its bio-geochemical cycling and impacts in the pristine environment with limited emission sources. Therefore, from May 2015 to Oct 2015, surface snow and snow-pits from Xiao Dongkemadi Glacier and glacier melt water were sampled along an elevation transect from 5410 to 5678 m a.s.l. in the central Tibetan Plateau (TP). The concentration of Hg in surface snow was observed to be higher than that from other parts of the TP. Unlike the southern parts of the TP, no clear altitudinal variation was observed in the central TP. The peak Total Hg (Hgr) concentration over the vertical profile on the snow pits corresponded with a distinct yellowish-brown dust layer supporting the fact that most of the Hg was associated with particulate matter. It was observed that only 34% of Hg in snow was lost when the surface snow was exposed to sunlight indicating that the surface snow is less influenced by the post-depositional process. Significant diurnal variation of HgT concentration was observed in the river water, with highest concentration observed at 7 pm when the discharge was highest and lowest concentration during 7-8 am when the discharge was lowest. Such results suggest that the rate of discharge was influential in the concentration of HgT in the glacier fed rivers of the TP. The estimated export of HgT from Dongkemadi river basin is 747.43 g yr(-1), which is quite high compared to other glaciers in the TP. Therefore, the export of global contaminant Hg might play enhanced role in the Alpine regions as these glaciers are retreating at an alarming rate under global warming which may have adverse impact on the ecosystem and the human health of the region.(C) 2017 Elsevier B.V. All rights reserved.
语种: 英语
WOS记录号: WOS:000405253500098
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7933
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Chinese Acad Sci, State Key Lab Cryospher Sci, Northwest Inst Ecoenvironm & Resources, Donggang West Rd 320, Lanzhou 730000, Peoples R China.
2.Chinese Acad Sci, Key Lab Tibetan Environm Changes & Land Surface P, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China.
3.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100085, Peoples R China.
4.HERI, Kathmandu, Nepal.
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
6.State Key Lab Cryospher Sci, Tanggula Cryosphere & Environm Observat Stn, Lanzhou 730000, Peoples R China.
7.Lappeenranta Univ Technol, Lab Green Chem, Sammonkatu 12, FI-50130 Mikkeli, Finland.

Recommended Citation:
Paudyal, R ,Kang, SC ,Huang, J ,et al. Insights into mercury deposition and spatiotemporal variation in the glacier and melt water from the central Tibetan Plateau[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2017,599(0):2046-2053.
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