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Using Mercury Isotopes To Understand Mercury Accumulation in the Montane Forest Floor of the Eastern Tibetan Plateau
Xun Wang;  Ji Luo;  Runsheng Yin;  Wei Yuan;  Che-Jen Lin;  Jonas Sommar;  Xinbin Feng;  Haiming Wang;  Cynthia Lin
2017
Source PublicationEnvironmental Science & Technology
Volume51Issue:2Pages:801-809
Abstract

Mercury accumulation in montane forested areas plays an important role in global Hg cycling. In this study, we measured stable Hg isotopes in soil and litter samples to understand Hg accumulation on the forest floor along the eastern fringe of the Tibetan Plateau (TP). The low atmospheric Hg inputs lead to the small Hg pool size (23 +/- 9 mg m(-2) in 0-60 cm soil horizon), up to 1 order of magnitude lower than to -0.05 parts per thousand) in the litter at low elevations (3100 to 3600 m) suggests an influence of local anthropogenic emissions, whereas the more significant negative Delta Hg-199 (-0.38 to -0.15 parts per thousand) at high elevations (3700 to 4300 m) indicates impact from long-range transport. Hg input from litter is more important than wet deposition to Hg accumulation on the forest floor, as evidenced by the negative Delta Hg-199 found in the surface soil samples. Correlation analyses of Delta Hg-199 versus total carbon and leaf area index suggest that litter biomass production is a predominant factor in atmospheric Hg inputs to the forest floor. Precipitation and temperature show indirect effects on Hg accumulation by influencing litter biomass production in the eastern TP.

KeywordGaseous Elemental Mercury Timberline Coniferous Forests Western United-states Atmospheric Mercury Spatial-distribution Stable-isotopes Wet Deposition Southwestern China Elevation Gradient Free Troposphere
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/7780
Collection矿床地球化学国家重点实验室
Affiliation1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
2.University of Chinese Academy of Sciences, Beijing 100049, China
3.Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, and Ministry of Water Conservancy, Chengdu 610041, China
4.State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
5.Environmental Chemistry and Technology Program, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
6.Center for Advances in Water and Air Quality, Lamar University, Beaumont, Texas 77710, United States
7.The McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
First Author Affilication中国科学院地球化学研究所
Corresponding Author Affilication中国科学院地球化学研究所
Recommended Citation
GB/T 7714
Xun Wang;Ji Luo;Runsheng Yin;Wei Yuan;Che-Jen Lin;Jonas Sommar;Xinbin Feng;Haiming Wang;Cynthia Lin. Using Mercury Isotopes To Understand Mercury Accumulation in the Montane Forest Floor of the Eastern Tibetan Plateau[J]. Environmental Science & Technology,2017,51(2):801-809.
APA Xun Wang;Ji Luo;Runsheng Yin;Wei Yuan;Che-Jen Lin;Jonas Sommar;Xinbin Feng;Haiming Wang;Cynthia Lin.(2017).Using Mercury Isotopes To Understand Mercury Accumulation in the Montane Forest Floor of the Eastern Tibetan Plateau.Environmental Science & Technology,51(2),801-809.
MLA Xun Wang;Ji Luo;Runsheng Yin;Wei Yuan;Che-Jen Lin;Jonas Sommar;Xinbin Feng;Haiming Wang;Cynthia Lin."Using Mercury Isotopes To Understand Mercury Accumulation in the Montane Forest Floor of the Eastern Tibetan Plateau".Environmental Science & Technology 51.2(2017):801-809.
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