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DOI	10.1016/j.envpol.2019.113432
	Mercury isotopes in frozen soils reveal transboundary atmospheric mercury deposition over the Himalayas and Tibetan Plateau
	Huang, Jie; Kang, Shichang; Yin, Runsheng; Guo, Junming; Lepak, Ryan; Mika, Sillanpaa; Tripathee, Lekhendra; Sun, Shiwei
通讯作者	Huang, J (通讯作者)
发表日期	2020
ISSN	0269-7491
EISSN	1873-6424
卷号	256
英文摘要	The concentration and isotopic composition of mercury (Hg) were studied in frozen soils along a southwest-northeast transect over the Himalaya-Tibet. Soil total Hg (Hg-T) concentrations were significantly higher in the southern slopes (72 +/- 54 ng g(-1), 2SD, n = 21) than those in the northern slopes (43 +/- 26 ng g(-1), 2SD, n = 10) of Himalaya-Tibet. No significant relationship was observed between Hg T concentrations and soil organic carbon (SOC), indicating that the Hg-T variation was not governed by SOC. Soil from the southern slopes showed significantly negative mean delta Hg-202 (-0.53 +/- 0.50 parts per thousand, 2SD, n = 21) relative to those from the northern slopes (-0.12 +/- 0.40 parts per thousand, 2SD, n = 10). The delta Hg-202 values of the southern slopes are more similar to South Asian anthropogenic Hg emissions. A significant correlation between 1/Hg-T and delta Hg-202 was observed in all the soil samples, further suggesting a mixing of Hg from South Asian anthropogenic emissions and natural geochemical background. Large ranges of Delta Hg-199 (-0.45 and 0.24 parts per thousand) were observed in frozen soils. Most of soil samples displayed negative Delta Hg-199 values, implying they mainly received Hg from gaseous Hg(0) deposition. A few samples had slightly positive odd-MIF, indicating precipitation-sourced Hg was more prevalent than gaseous Hg(0) in certain areas. The spatial distribution patterns of Hg-T concentrations and Hg isotopes indicated that Himalaya-Tibet, even its northern part, may have been influenced by transboundary atmospheric Hg pollution from South Asia. (C) 2019 Elsevier Ltd. All rights reserved.
关键词	INDEPENDENT FRACTIONATION SPATIAL-DISTRIBUTION PRECIPITATION HG PERMAFROST SIGNATURES TRANSPORT DYNAMICS REGION VAPOR
英文关键词	Mercury; Transboundary pollution; Frozen soil; Himalaya-Tibet
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000504757200087
来源期刊	ENVIRONMENTAL POLLUTION
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/259990
推荐引用方式 GB/T 7714	Huang, Jie,Kang, Shichang,Yin, Runsheng,et al. Mercury isotopes in frozen soils reveal transboundary atmospheric mercury deposition over the Himalayas and Tibetan Plateau[J]. 中国科学院青藏高原研究所,2020,256.
APA	Huang, Jie.,Kang, Shichang.,Yin, Runsheng.,Guo, Junming.,Lepak, Ryan.,...&Sun, Shiwei.(2020).Mercury isotopes in frozen soils reveal transboundary atmospheric mercury deposition over the Himalayas and Tibetan Plateau.ENVIRONMENTAL POLLUTION,256.
MLA	Huang, Jie,et al."Mercury isotopes in frozen soils reveal transboundary atmospheric mercury deposition over the Himalayas and Tibetan Plateau".ENVIRONMENTAL POLLUTION 256(2020).