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Accumulation of Atmospheric Mercury in Glacier Cryoconite over Western China
Huang, J (Huang, Jie)1,2; Kang, SC (Kang, Shichang)3,9; Ma, M (Ma, Ming)4; Guo, JM (Guo, Junming)3; Cong, ZY (Cong, Zhiyuan)1,2; Dong, ZW (Dong, Zhiwen)3; Yin, RS (Yin, Runsheng)5; Xu, JZ (Xu, Jianzhong)3; Tripathee, L (Tripathee, Lekhendra)3; Ram, K (Ram, Kirpa)1,2,6; Wang, FY (Wang, Feiyue)7,8

Cryoconite is a granular aggregate, comprised of both mineral and biological material, and known to accumulate atmospheric contaminants. In this study, cryoconite was sampled from seven high-elevation glaciers in Western China to investigate the spatial and altitudinal patterns of atmospheric mercury (Hg) accumulation in the cryoconite. The results show that total Hg (Hg-T) concentrations in cryoconite were significant with relatively higher Hg accumulation in the southern glaciers (66.0 +/- 29.3 ng g(-1)), monsoon-influenced regions, than those in the northern glaciers (42.5 +/- 20.7 ng g(-1)), westerlies-influenced regions. The altitudinal profile indicates that Hg-T concentrations in the northern glaciers decrease significantly with altitude, while those in the southern glaciers generally increase toward higher elevations. Unexpectedly high accumulation of methyl-Hg (MeHg) with an average of 1.0 +/- 0.4 ng g(-1) was also detected in the cryoconite samples, revealing the surface of cryoconite could act as a potential site for Hg methylation in alpine environments. Our preliminary estimate suggests a storage of similar to 34.3 +/- 17.4 and 0.65 +/- 0.28 kg of Hg-T and MeHg from a single year of formation process in the glacier cryoconite. Therefore, glacier cryoconite could play an important role in Hg storage and transformation, which may result in downstream effects on glacier-fed ecosystems under climate warming scenario.

Subject AreaEnvironmental Sciences
WOS IDWOS:000472682900005
Indexed BySCI
KeywordTibetan Plateau Heavy-metals Spatial-distribution Ice Deposition Dust Snow Methylmercury Speciation Himalayas
WOS Research AreaEngineering ; Environmental Sciences & Ecology
WOS SubjectEngineering, Environmental ; Environmental Sciences
Cooperation Status国际
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Document Type期刊论文
Corresponding AuthorHuang, J (Huang, Jie)
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China;
2.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China;
3.Chinese Acad Sci, Northeast Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China;
4.Southwest Univ, Coll Resources & Environm, Chongqing 400715, Peoples R China;
5.Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550002, Guizhou, Peoples R China;
6.Banaras Hindu Univ, Inst Environm & Sustainable Dev, Varanasi 221005, Uttar Pradesh, India;
7.Univ Manitoba, Ctr Earth Observat Sci, Winnipeg, MB R3T 2N2, Canada;
8.Univ Manitoba, Dept Environm & Geog, Winnipeg, MB R3T 2N2, Canada;
9.Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
Recommended Citation
GB/T 7714
Huang, J ,Kang, SC ,Ma, M ,et al. Accumulation of Atmospheric Mercury in Glacier Cryoconite over Western China[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2019,53(12):6632-6639.
APA Huang, J .,Kang, SC .,Ma, M .,Guo, JM .,Cong, ZY .,...&Wang, FY .(2019).Accumulation of Atmospheric Mercury in Glacier Cryoconite over Western China.ENVIRONMENTAL SCIENCE & TECHNOLOGY,53(12),6632-6639.
MLA Huang, J ,et al."Accumulation of Atmospheric Mercury in Glacier Cryoconite over Western China".ENVIRONMENTAL SCIENCE & TECHNOLOGY 53.12(2019):6632-6639.
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