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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, Maor 1; Raveh-Rubin, Shira 2; Peleg, Mordechai 3,4; Fredj, Erick 5; Tas, Eran 1
通讯作者	Tas, Eran
来源期刊	ENVIRONMENTAL RESEARCH LETTERS
ISSN	1748-9326
出版年	2020
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- and chlorine-induced oxidation (MBCO) in the remote marine boundary layer (RMBL), and by photochemical smog oxidants, primarily ozone (O-3) 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)-O-3 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.
英文关键词	Atmospheric mercury oxidation GEM GOM photochemistry ozone hydroxyl radical field measurements
类型	Article
语种	英语
国家	Israel
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000539742400001
WOS关键词	GASEOUS ELEMENTAL MERCURY ; GAS-PHASE OXIDATION ; OXIDIZED MERCURY ; SCIENTIFIC UNCERTAINTIES ; HALOGEN CHEMISTRY ; NEGEV DESERT ; MODEL ; OH ; HO2 ; BROMINE
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
来源机构	Hebrew University of Jerusalem
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/318743
作者单位	1.Hebrew Univ Jerusalem, Dept Soil & Water Sci, Robert H Smith Fac Agr Food & Environm, Rehovot, Israel; 2.Weizmann Inst Sci, Dept Earth & Planetary Sci, Rehovot, Israel; 3.Inst Earth Sci, Edmond J Safra Campus, Givat Ram, Israel; 4.Hebrew Univ Jerusalem, IL-91904 Jerusalem, Israel; 5.Jerusalem Coll Technol, Dept Comp Sci, IL-91160 Jerusalem, Israel
推荐引用方式 GB/T 7714	Gabay, Maor,Raveh-Rubin, Shira,Peleg, Mordechai,et al. Is oxidation of atmospheric mercury controlled by different mechanisms in the polluted continental boundary layer vs. remote marine boundary layer?[J]. Hebrew University of Jerusalem,2020,15(6).
APA	Gabay, Maor,Raveh-Rubin, Shira,Peleg, Mordechai,Fredj, Erick,&Tas, Eran.(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, Maor,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).