Global warming accelerates uptake of atmospheric mercury in regions experiencing glacier retreat

doi:10.1061/(ASCE)HY.1943-7900.0001766

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Global warming accelerates uptake of atmospheric mercury in regions experiencing glacier retreat
	Xun Wang 4; Ji Luo 5; Wei Yuan 4,6; Che-Jen Lin ; (4,5); Feiyue Wang 7; Chen Liu 4,6; Genxu Wang 5; Xinbin Feng 2,4,6
刊名	PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
	2020
卷号	117 期号:4 页码:2049–2055
关键词	global warming glacier retreat atmospheric mercury deposition
ISSN号	0027-8424
DOI	10.1061/(ASCE)HY.1943-7900.0001766
产权排序	2
文献子类	Article
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-to-vegetation 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 (Hg-0) from the atmosphere. The accelerated uptake enriches the Hg pool size in glacier-retreated areas by a factor of similar to 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 parts per thousand of the global land surface) since the Little Ice Age (similar to 1850). By 2100, an additional similar to 300 Mg of Hg will be sequestered from the atmosphere in glacier-retreated regions globally, which is similar to 3 times the total Hg mass loss by meltwater efflux (similar to 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.
电子版国际标准刊号	1943-7900
语种	英语
WOS记录号	WOS:000536104300004
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/33994]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者	Xinbin Feng
作者单位	1.Center for Advances in Water and Air Quality, Lamar University, Beaumont, TX 77710; 2.Center for Excellence in Quaternary Science and Global Change, Chinese Academy of Sciences, Xian 710061, China 3.Department of Civil and Environmental Engineering, Lamar University, Beaumont, TX 77710; 4.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; 5.Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China; 6.University of Chinese Academy of Sciences, Beijing 100049, China; 7.Centre for Earth Observation Science, and Department of Environment and Geography, University of Manitoba, Winnipeg, MB R3T 2N2, Canada;
推荐引用方式 GB/T 7714	Xun Wang,Ji Luo,Wei Yuan,et al. Global warming accelerates uptake of atmospheric mercury in regions experiencing glacier retreat[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2020,117(4):2049–2055.
APA	Xun Wang.,Ji Luo.,Wei Yuan.,Che-Jen Lin.,.,...&Xinbin Feng.(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),2049–2055.
MLA	Xun Wang,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):2049–2055.