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DOI	10.1088/1748-9326/ab7b26
	Is oxidation of atmospheric mercury controlled by different mechanisms in the polluted continental boundary layer vs. remote marine boundary layer?
	Gabay M.; Raveh-Rubin S.; Peleg M.; Fredj E.; Tas E.
发表日期	2020
ISSN	17489318
卷号	15 期号:6
英文摘要	Deposition of atmospheric mercury is of global concern, primarily due to health effects associated with efficient bioaccumulation of mercury in marine food webs. Although oxidation of gaseous elementary mercury (GEM), the major fraction of atmospheric mercury, is a critical stage in regulating atmospheric mercury deposition efficiency, this oxidation is currently not well-characterized, limiting modeling-based assessments of mercury in the environment. Based on a previous study, we hypothesized that the oxidation of GEM is predominantly controlled by multistep bromine- A nd chlorine-induced oxidation (MBCO) in the remote marine boundary layer (RMBL), and by photochemical smog oxidants, primarily ozone (O3) and hydroxyl radical (OH), in the polluted continental boundary layer (PCBL). To test this hypothesis, we used the following analyses: (i) application of a newly developed criterion to evaluate the gaseous oxidized mercury (GOM)-O3 association based on previous studies in the RMBL and PCBL; (ii) measurement-based box simulations of GEM oxidation in the RMBL and at a PCBL site; and (iii) measurement-based analysis of photochemical oxidation vs. other processes which potentially influence GOM. Our model simulations indicated that the MBCO mechanism can reproduce GOM levels in the RMBL, but not in the PCBL. Our data analysis suggested the important role of photochemical smog oxidants in GEM oxidation in the PCBL, potentially masked by the effect of relative humidity and entrainment of free tropospheric air. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	Atmospheric mercury oxidation; field measurements; GEM; GOM; hydroxyl radical; ozone; photochemistry
语种	英语
scopus关键词	Air entrainment; Air pollution; Atmospheric humidity; Biochemistry; Chemical contamination; Deposition; Oxidants; Oxidation; Atmospheric mercury; Atmospheric mercury deposition; Different mechanisms; Gaseous oxidized mercuries; Induced oxidations; Marine boundary layers; Measurement based analysis; Photochemical oxidation; Atmospheric boundary layer; atmospheric chemistry; atmospheric deposition; boundary layer; hydroxyl radical; mercury (element); oxidant; oxidation; ozone; relative humidity; troposphere
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154013
作者单位	Department of Soil and Water Sciences, Robert H. Smith Faculty of Agriculture Food and Environment, Hebrew University of Jerusalem, Rehovot, Israel; Department of Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot, Israel; Institute of Earth Sciences, Edmond J. Safra Campus, Hebrew University of Jerusalem, Givat Ram, Jerusalem, 91904, Israel; Department of Computer Science, Jerusalem College of Technology, Jerusalem, 91160, Israel
推荐引用方式 GB/T 7714	Gabay M.,Raveh-Rubin S.,Peleg M.,et al. Is oxidation of atmospheric mercury controlled by different mechanisms in the polluted continental boundary layer vs. remote marine boundary layer?[J],2020,15(6).
APA	Gabay M.,Raveh-Rubin S.,Peleg M.,Fredj E.,&Tas E..(2020).Is oxidation of atmospheric mercury controlled by different mechanisms in the polluted continental boundary layer vs. remote marine boundary layer?.Environmental Research Letters,15(6).
MLA	Gabay M.,et al."Is oxidation of atmospheric mercury controlled by different mechanisms in the polluted continental boundary layer vs. remote marine boundary layer?".Environmental Research Letters 15.6(2020).