气候变化领域集成服务门户(CCPortal): Global warming accelerates uptake of atmospheric mercury in regions experiencing glacier retreat

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DOI	10.1073/pnas.1906930117
	Global warming accelerates uptake of atmospheric mercury in regions experiencing glacier retreat
	Wang X.; Luo J.; Yuan W.; Lin C.-J.; Wang F.; Liu C.; Wang G.; Feng X.
发表日期	2020
ISSN	0027-8424
起始页码	2049
结束页码	2055
卷号	117 期号:4
英文摘要	As global climate continues to warm, melting of glaciers releases a large quantity of mercury (Hg) originally locked in ice into the atmosphere and downstream ecosystems. Here, we show an opposite process that captures atmospheric Hg through glacier-tovegetation succession. Our study using stable isotope techniques at 3 succession sites on the Tibetan Plateau reveals that evolving vegetation serves as an active "pump" to take up gaseous elemental mercury (Hg0) from the atmosphere. The accelerated uptake enriches the Hg pool size in glacier-retreated areas by a factor of ∼10 compared with the original pool size in the glacier. Through an assessment of Hg source-sink relationship observed in documented glacier-retreated areas in the world (7 sites of tundra/steppe succession and 5 sites of forest succession),we estimate that 400 to 600 Mg of Hg has been accumulated in glacier-retreated areas (5% of the global land surface) since the Little Ice Age (∼1850). By 2100, an additional ∼300 Mg of Hg will be sequestered from the atmosphere in glacier-retreated regions globally, which is ∼3 times the total Hg mass loss by meltwater efflux (∼95 Mg) in alpine and subpolar glacier regions. The recapturing of atmospheric Hg by vegetation in glacier-retreated areas is not accounted for in current global Hg models. Similar processes are likely to occur in other regions that experience increased vegetation due to climate or land use changes, which need to be considered in the assessment of global Hg cycling. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Atmospheric mercury deposition; Glacier retreat; Global warming
语种	英语
scopus关键词	mercury; stable isotope; water; mercury; alpine tundra; Article; atmospheric deposition; bioaccumulation; controlled study; deglaciation; greenhouse effect; land use; priority journal; source sink relationship; Tibet; vegetation; air pollutant; chemistry; ecosystem; environmental monitoring; ice cover; metabolism; plant; soil pollutant; water pollutant; Air Pollutants; Ecosystem; Environmental Monitoring; Global Warming; Ice Cover; Mercury; Plants; Soil Pollutants; Tibet; Water Pollutants, Chemical
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158854
作者单位	Wang, X., State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China; Luo, J., Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, China; Yuan, W., State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China, University of Chinese Academy of Sciences, Beijing, 100049, China; Lin, C.-J., Center for Advances in Water and Air Quality, Lamar University, Beaumont, TX 77710, United States, Department of Civil and Environmental Engineering, Lamar University, Beaumont, TX 77710, United States; Wang, F., Centre for Earth Observation Science, Department of Environment and Geography, University of Manitoba, Winnipeg, MB R3T 2N2, Canada; Liu, C., State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 5...
推荐引用方式 GB/T 7714	Wang X.,Luo J.,Yuan W.,et al. Global warming accelerates uptake of atmospheric mercury in regions experiencing glacier retreat[J],2020,117(4).
APA	Wang X..,Luo J..,Yuan W..,Lin C.-J..,Wang F..,...&Feng X..(2020).Global warming accelerates uptake of atmospheric mercury in regions experiencing glacier retreat.Proceedings of the National Academy of Sciences of the United States of America,117(4).
MLA	Wang X.,et al."Global warming accelerates uptake of atmospheric mercury in regions experiencing glacier retreat".Proceedings of the National Academy of Sciences of the United States of America 117.4(2020).