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Insights into mercury in glacier snow and its incorporation into meltwater runoff based on observations in the southern Tibetan Plateau
Sun, SW (Sun, Shiwei)1,4; Kang, SC (Kang, Shichang)1,3,4; Guo, JM (Guo, Junming)1,4; Zhang, QG (Zhang, Qianggong)2,3; Paudyal, R (Paudyal, Rukumesh)1,4; Sun, XJ (Sun, Xuejun)2,4; Qin, DH (Qin, Dahe)1
Source PublicationJOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
2018-06-01
Volume68Issue:0Pages:130-142
DOI10.1016/j.jes.2018.03.033
AbstractThe Tibetan Plateau (TP) is recognized as "Water Tower of Asia". Yet our understanding of mechanisms influencing incorporation of mercury (Hg) into freshwater in mountain glaciers on the TP remains quite limited. Extensive sampling of environmental matrices (e.g., snow/ice) were conducted on the East Rongbuk glacier on Mt. Everest and Zhadang glacier on Mt. Nyainqentanglha for Hg speciation analysis. Speciated Hg behaved quite different during snowmelt: a preferential early release of DHg (dissolved Hg) was observed at the onset of snowmelt, whereas PHg (particulate-bound Hg) and THg (total Hg) become relatively enriched in snow and released later. Small fraction of Hg in snow was lost during a snowmelt day (18.9%-34.7%) with a large proportion (58.1%-87.3%) contributed by PHg decrease, indicating that the deposited Hg is most likely retained in glacier snow/ice. Furthermore, THg were positively correlated with PHg and crustal major ions (e.g., Ca2+, Mg2+) during snowmelt, indicating that Hg is mainly migrated with particulates. The main pathway of Hg loss during snowmelt was most probably associated with release of PHg with meltwater, which was greatly influenced by ablation intensity of snow/ice. This should be paid particular concern as Hg preserved in mountain glaciers will mostly enter aquatic ecosystem as climate warms, impacting on downstream ecosystems adversely. Obvious decrease of THg during the downstream transport from glacier was observed with a large proportion contributed by PHg decrease. The main removal mechanism of Hg was associated with sedimentation of PHg during the transport process. (C) 2018 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
WOS IDWOS:000439687300013
Language英语
Indexed BySCIE
KeywordICE CORE ATMOSPHERIC MERCURY SEASONAL-VARIATIONS MT. EVEREST ELEMENTAL COMPOSITION ARCTIC SNOWPACK NORTH SLOPE TRANSFORMATIONS NYAINQENTANGLHA ENVIRONMENT
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
Cooperation Status国内
ISSN1001-0742
Department环境变化与地表过程重点实验室
PublisherSCIENCE PRESS
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8635
Collection图书馆
Affiliation1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China;
2.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China;
3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China;
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
Recommended Citation
GB/T 7714
Sun, SW ,Kang, SC ,Guo, JM ,et al. Insights into mercury in glacier snow and its incorporation into meltwater runoff based on observations in the southern Tibetan Plateau[J]. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,2018,68(0):130-142.
APA Sun, SW .,Kang, SC .,Guo, JM .,Zhang, QG .,Paudyal, R .,...&Qin, DH .(2018).Insights into mercury in glacier snow and its incorporation into meltwater runoff based on observations in the southern Tibetan Plateau.JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,68(0),130-142.
MLA Sun, SW ,et al."Insights into mercury in glacier snow and its incorporation into meltwater runoff based on observations in the southern Tibetan Plateau".JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA 68.0(2018):130-142.
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