Insights into mercury in glacier snow and its incorporation into meltwater runoff based on observations in the southern Tibetan Plateau
文献类型：期刊论文
| 作者 | Paudyal, R (Paudyal, Rukumesh)1,4; Qin, DH (Qin, Dahe)1; 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; Sun, XJ (Sun, Xuejun)2,4 |
| 刊名 | JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
 |
| 出版日期 | 2018-06-01 |
| 卷号 | 68期号:0页码:130-142 |
| 关键词 | ICE CORE ATMOSPHERIC MERCURY SEASONAL-VARIATIONS MT. EVEREST ELEMENTAL COMPOSITION ARCTIC SNOWPACK NORTH SLOPE TRANSFORMATIONS NYAINQENTANGLHA ENVIRONMENT |
| ISSN号 | 1001-0742 |
| DOI | 10.1016/j.jes.2018.03.033 |
| 英文摘要 | The 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研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000439687300013 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.itpcas.ac.cn/handle/131C11/8635]  |
| 专题 | 青藏高原研究所_图书馆 |
| 作者单位 | 1.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. |
| 推荐引用方式 GB/T 7714 | Paudyal, R ,Qin, DH ,Sun, SW ,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 | Paudyal, R .,Qin, DH .,Sun, SW .,Kang, SC .,Guo, JM .,...&Sun, XJ .(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 | Paudyal, R ,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. |
入库方式： OAI收割
来源：青藏高原研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。