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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 J.; Kang S.; Yin R.; Guo J.; Lepak R.; Mika S.; Tripathee L.; Sun S.
发表日期	2020
ISSN	16808584
卷号	256
英文摘要	Transboundary Hg pollution from South Asia to the Himalaya-Tibet could be evidenced by using frozen soil Hg isotopic compositions as tracers. © 2019 Elsevier LtdThe concentration and isotopic composition of mercury (Hg) were studied in frozen soils along a southwest-northeast transect over the Himalaya-Tibet. Soil total Hg (HgT) 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 HgT concentrations and soil organic carbon (SOC), indicating that the HgT variation was not governed by SOC. Soil from the southern slopes showed significantly negative mean δ202Hg (−0.53 ± 0.50‰, 2SD, n = 21) relative to those from the northern slopes (−0.12 ± 0.40‰, 2SD, n = 10). The δ202Hg values of the southern slopes are more similar to South Asian anthropogenic Hg emissions. A significant correlation between 1/HgT and δ202Hg 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 Δ199Hg (−0.45 and 0.24‰) were observed in frozen soils. Most of soil samples displayed negative Δ199Hg 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 HgT concentrations and Hg isotopes indicated that Himalaya-Tibet, even its northern part, may have been influenced by transboundary atmospheric Hg pollution from South Asia. © 2019 Elsevier Ltd
英文关键词	Frozen soil; Himalaya-Tibet; Mercury; Transboundary pollution
语种	英语
scopus关键词	Environmental Pollution
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/158490
作者单位	Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100101, China; State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, 100101, China; State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, China; Environmental Chemistry and Technology Program, University of Wisconsin-Madison, Madison, WI 53706, United States; Laboratory of Green Chemistry, School of Engineering Science, Lappeenranta University of Technology, Mikkeli, FI 50130, Finland; University of the Chinese Academy of Sciences, Beijing, 100049, China
推荐引用方式 GB/T 7714	Huang J.,Kang S.,Yin R.,et al. Mercury isotopes in frozen soils reveal transboundary atmospheric mercury deposition over the Himalayas and Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2020,256.
APA	Huang J..,Kang S..,Yin R..,Guo J..,Lepak R..,...&Sun S..(2020).Mercury isotopes in frozen soils reveal transboundary atmospheric mercury deposition over the Himalayas and Tibetan Plateau.,256.
MLA	Huang J.,et al."Mercury isotopes in frozen soils reveal transboundary atmospheric mercury deposition over the Himalayas and Tibetan Plateau".256(2020).