气候变化领域集成服务门户(CCPortal): An Experimental Assessment of the Importance of S(IV) Oxidation by Hypohalous Acids in the Marine Atmosphere

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DOI	10.1029/2019GL086465
	An Experimental Assessment of the Importance of S(IV) Oxidation by Hypohalous Acids in the Marine Atmosphere
	Liu T.; Abbatt J.P.D.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:4
英文摘要	Hypohalous acids (HOCl + HOBr) play an important but highly uncertain role in sulfate aerosol production in the marine atmosphere due to the unmeasured reaction rate constants (k) of HOCl/HOBr and HSO3 −, the dominant S(IV) species in acidified sea salt aerosols and cloudwater. We directly determined (Formula presented.) by investigating the kinetics of aqueous oxidation of dissolved SO2 by HOCl in low pH aerosol particles in a flow tube. Further, we predicted KHOBr+HSO3 − using a novel kinetics model developed from the HOCl/HSO3 − results. KHOBr+HSO3 − and KHOCL+HSO3 − were estimated to be 2 and 3 orders of magnitude lower, respectively, than the values used in atmospheric models. We assess the importance of halogen-driven S(IV) oxidation in the marine atmosphere with this new fundamental understanding and find that in-cloud sulfate production via HOBr oxidation remains an important atmospheric process, but the HOCl oxidation pathway in acidified sea salt aerosols is unlikely to be important. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Aerosols; Atmospheric chemistry; Atmospheric movements; Chlorine compounds; Kinetics; Oxidation; Rate constants; Sulfur dioxide; Atmospheric process; Experimental assessment; Hypohalous acids; Marine atmosphere; Orders of magnitude; Sulfate aerosols; Sulfate production; Sulfur dioxide oxidation; Bromine compounds; aerosol; marine atmosphere; oxidation; reaction kinetics; sulfate; sulfur dioxide
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170643
作者单位	Department of Chemistry, University of Toronto, Toronto, ON, Canada
推荐引用方式 GB/T 7714	Liu T.,Abbatt J.P.D.. An Experimental Assessment of the Importance of S(IV) Oxidation by Hypohalous Acids in the Marine Atmosphere[J],2020,47(4).
APA	Liu T.,&Abbatt J.P.D..(2020).An Experimental Assessment of the Importance of S(IV) Oxidation by Hypohalous Acids in the Marine Atmosphere.Geophysical Research Letters,47(4).
MLA	Liu T.,et al."An Experimental Assessment of the Importance of S(IV) Oxidation by Hypohalous Acids in the Marine Atmosphere".Geophysical Research Letters 47.4(2020).