气候变化领域集成服务门户(CCPortal): Stable Mercury Isotopes Revealing Photochemical Processes in the Marine Boundary Layer

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DOI	10.1029/2021JD034630
	Stable Mercury Isotopes Revealing Photochemical Processes in the Marine Boundary Layer
	Qiu Y.; Gai P.; Yue F.; Zhang Y.; He P.; Kang H.; Yu X.; Lam P.K.S.; Chen J.; Xie Z.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:16
英文摘要	The marine boundary layer (MBL) is an important transportation and reaction zone of atmospheric mercury on Earth. However, the transformation mechanisms of Hg in the MBL remain unclear. In this study, total suspended particle samples were collected in the MBL during two cruises, and the levels of particulate bound mercury (PBM) and mercury isotopes were analyzed. The results showed that (a) continental anthropogenic emissions have limited contribution to PBM in the MBL; (b) PBM likely experienced the oxidation of Hg0 by Br radicals and subsequent adsorption of Hg2+ on to particulate surfaces, as inferred from the significant negative δ202Hg; (c) the Δ199Hg/Δ201Hg ratio of ∼1.0 suggests that PBM underwent photoreduction, which was influenced by organic compounds, and the contribution of photoreduction to the extent of odd-number mass-independent fractionation in PBM in the MBL was more significant than that of oxidation triggered by Br atoms. This study provides insights into the photochemical processes influencing mercury in the MBL. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	marine boundary layer; mercury isotope; oxidation; particulate bound mercury; photoreduction
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/237112
作者单位	Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei, China; Suzhou Institute for Advanced Study, University of Science and Technology of China, Suzhou, China; Institute of Surface-Earth System Science, Tianjin University, Tianjin, China; College of Resources and Environment, Chongqing School, University of Chinese Academy of Sciences, Chongqing, China; Department of Chemistry, State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong; Center for Excellence in Urban Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China
推荐引用方式 GB/T 7714	Qiu Y.,Gai P.,Yue F.,et al. Stable Mercury Isotopes Revealing Photochemical Processes in the Marine Boundary Layer[J],2021,126(16).
APA	Qiu Y..,Gai P..,Yue F..,Zhang Y..,He P..,...&Xie Z..(2021).Stable Mercury Isotopes Revealing Photochemical Processes in the Marine Boundary Layer.Journal of Geophysical Research: Atmospheres,126(16).
MLA	Qiu Y.,et al."Stable Mercury Isotopes Revealing Photochemical Processes in the Marine Boundary Layer".Journal of Geophysical Research: Atmospheres 126.16(2021).