气候变化领域集成服务门户(CCPortal): New evidence for atmospheric mercury transformations in the marine boundary layer from stable mercury isotopes

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DOI	10.5194/acp-20-9713-2020
	New evidence for atmospheric mercury transformations in the marine boundary layer from stable mercury isotopes
	Yu B.; Yang L.; Wang L.; Liu H.; Xiao C.; Liang Y.; Liu Q.; Yin Y.; Hu L.; Shi J.; Jiang G.
发表日期	2020
ISSN	1680-7316
起始页码	9713
结束页码	9723
卷号	20 期号:16
英文摘要	The marine boundary layer (MBL) is the largest transport place and reaction vessel of atmospheric mercury (Hg). The transformations of atmospheric Hg in the MBL are crucial for the global transport and deposition of Hg. Herein, Hg isotopic compositions of total gaseous mercury (TGM) and particle-bound Hg (PBM) collected during three cruises to Chinese seas in summer and winter were measured to reveal the transformation processes of atmospheric Hg in the MBL. Unlike the observation results at inland sites, isotopic compositions of TGM in the MBL were affected not only by mixing continental emissions but also largely by the oxidation of Hg0 primarily derived by Br atoms. 199Hg values of TGM were significantly positively correlated with air temperature in summer, indicating that processes inducing positive mass-independent fractionation of odd isotopes in TGM could be more active at low temperatures, while the relative processes might be weak in winter. In contrast, the positive 199Hg and high ratios of 199Hgg•201Hg in PBM indicated that alternative oxidants other than Br or Cl atoms played a major role in the formation of Hg(II) in PBM, likely following the nuclear volume effect. Our results suggest the importance of local Hg environmental behaviors caused by an abundance of highly reactive species and provide new evidence for understanding the complicated transformations of atmospheric Hg in the MBL. © 2020 BMJ Publishing Group. All rights reserved.
语种	英语
scopus关键词	boundary layer; isotopic composition; mercury (element); oxidation; seasonal variation; stable isotope; transformation; China
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/247579
作者单位	State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310000, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China; Institute of Environment and Health, Jianghan University, Wuhan, 430056, China
推荐引用方式 GB/T 7714	Yu B.,Yang L.,Wang L.,et al. New evidence for atmospheric mercury transformations in the marine boundary layer from stable mercury isotopes[J],2020,20(16).
APA	Yu B..,Yang L..,Wang L..,Liu H..,Xiao C..,...&Jiang G..(2020).New evidence for atmospheric mercury transformations in the marine boundary layer from stable mercury isotopes.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(16).
MLA	Yu B.,et al."New evidence for atmospheric mercury transformations in the marine boundary layer from stable mercury isotopes".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.16(2020).