气候变化领域集成服务门户(CCPortal): Efficient control of atmospheric sulfate production based on three formation regimes

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DOI	10.1038/s41561-019-0485-5
	Efficient control of atmospheric sulfate production based on three formation regimes
	Xue J.; Yu X.; Yuan Z.; Griffith S.M.; Lau A.K.H.; Seinfeld J.H.; Yu J.Z.
发表日期	2019
ISSN	17520894
卷号	12 期号:12
英文摘要	The formation of sulfate (SO4 2−) in the atmosphere is linked chemically to its direct precursor, sulfur dioxide (SO2), through several key oxidation paths for which nitrogen oxides or NOx (NO and NO2) play essential roles. Here we present a coherent description of the dependence of SO4 2– formation on SO2 and NOx under haze-fog conditions, in which fog events are accompanied by high aerosol loadings and fog-water pH in the range of 4.7–6.9. Three SO4 2– formation regimes emerge as defined by the role played by NOx. In the low-NOx regime, NOx act as catalyst for HOx, which is a major oxidant for SO2, whereas in the high-NOx regime, NO2 is a sink for HOx. Moreover, at highly elevated NOx levels, a so-called NO2-oxidant regime exists in which aqueous NO2 serves as the dominant oxidant of SO2. This regime also exists under clean fog conditions but is less prominent. Sensitivity calculations using an emission-driven box model show that the reduction of SO4 2– is comparably sensitive to the reduction of SO2 and NOx emissions in the NO2-oxidant regime, suggesting a co-reduction strategy. Formation of SO4 2− is relatively insensitive to NOx reduction in the low-NOx regime, whereas reduction of NOx actually leads to increased SO4 2– production in the intermediate high-NOx regime. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	atmospheric chemistry; chemical analysis; salt; sulfate
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124551
作者单位	Division of Environment and Sustainability, Hong Kong University of Science and Technology, Kowloon, Hong Kong, China; School of Environment and Energy, South China University of Technology, Guangzhou, China; Department of Chemistry, Hong Kong University of Science and Technology, Kowloon, Hong Kong, China; Department of Civil & Environmental Engineering, Hong Kong University of Science and Technology, Kowloon, Hong Kong, China; Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, United States
推荐引用方式 GB/T 7714	Xue J.,Yu X.,Yuan Z.,et al. Efficient control of atmospheric sulfate production based on three formation regimes[J],2019,12(12).
APA	Xue J..,Yu X..,Yuan Z..,Griffith S.M..,Lau A.K.H..,...&Yu J.Z..(2019).Efficient control of atmospheric sulfate production based on three formation regimes.Nature Geoscience,12(12).
MLA	Xue J.,et al."Efficient control of atmospheric sulfate production based on three formation regimes".Nature Geoscience 12.12(2019).