气候变化领域集成服务门户(CCPortal): Vegetation Mediated Mercury Flux and Atmospheric Mercury in the Alpine Permafrost Region of the Central Tibetan Plateau

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DOI	10.1021/acs.est.9b06636
	Vegetation Mediated Mercury Flux and Atmospheric Mercury in the Alpine Permafrost Region of the Central Tibetan Plateau
	Sun, Shiwei; Ma, Ming; He, Xiaobo; Obrist, Daniel; Zhang, Qianggong; Yin, Xiufeng; Sun, Tao; Huang, Jie; Guo, Junming; Kang, Shichang; Qin, Dahe
发表日期	2020
ISSN	0013-936X
起始页码	6043
结束页码	6052
卷号	54 期号:10
英文摘要	Measurements of land-air mercury (Hg) exchanges over vegetated surfaces are needed to further constrain Hg fluxes over vegetated terrestrial surfaces. Yet, knowledge of land-air Hg dynamics in alpine grasslands remains poor. Hg fluxes over an alpine meadow were measured throughout a full vegetation period in the central Tibetan Plateau (TP). This TP grassland served as a small source of atmospheric total gaseous Hg (TGM) during vegetation period (0.92 mu g m(-2)) fluxes decreased logarithmically during plant growing season, resulting from the influence of vegetation by light shading and plant Hg uptake, although the latter might be minor due to low biomass at this site. Temporal patterns of TGM indicated the importance of land-air dynamics in regulating TGM levels. During the plant emergence, diel pattern of TGM covaried with Hg emission fluxes resulting in lower concentrations at night and higher concentrations in afternoon. During all other vegetation stages, TGM showed minima before dawn and morning peak shortly after sunrise, in conjunction with corresponding Hg fluxes showing sink before dawn and source after sunrise. Moreover, TGM concentrations showed a decreasing trend with plant growing, further indicating the role of vegetation in driving seasonal TGM variations by regulating land-air Hg dynamics.
WOS研究方向	Engineering ; Environmental Sciences & Ecology
WOS类目	Engineering, Environmental ; Environmental Sciences
来源期刊	ENVIRONMENTAL SCIENCE & TECHNOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158828
作者单位	Ma, M; Kang, SC (corresponding author), Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China.; Kang, SC (corresponding author), CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China.; Kang, SC (corresponding author), Univ Chinese Acad Sci, Beijing 100049, Peoples R China.; Ma, M (corresponding author), Southwest Univ, Coll Resources & Environm, Chongqing 400715, Peoples R China.
推荐引用方式 GB/T 7714	Sun, Shiwei,Ma, Ming,He, Xiaobo,et al. Vegetation Mediated Mercury Flux and Atmospheric Mercury in the Alpine Permafrost Region of the Central Tibetan Plateau[J],2020,54(10).
APA	Sun, Shiwei.,Ma, Ming.,He, Xiaobo.,Obrist, Daniel.,Zhang, Qianggong.,...&Qin, Dahe.(2020).Vegetation Mediated Mercury Flux and Atmospheric Mercury in the Alpine Permafrost Region of the Central Tibetan Plateau.ENVIRONMENTAL SCIENCE & TECHNOLOGY,54(10).
MLA	Sun, Shiwei,et al."Vegetation Mediated Mercury Flux and Atmospheric Mercury in the Alpine Permafrost Region of the Central Tibetan Plateau".ENVIRONMENTAL SCIENCE & TECHNOLOGY 54.10(2020).