气候变化领域集成服务门户(CCPortal): Potential Effect of Halogens on Atmospheric Oxidation and Air Quality in China

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DOI	10.1029/2019JD032058
	Potential Effect of Halogens on Atmospheric Oxidation and Air Quality in China
	Li Q.; Badia A.; Wang T.; Sarwar G.; Fu X.; Zhang L.; Zhang Q.; Fung J.; Cuevas C.A.; Wang S.; Zhou B.; Saiz-Lopez A.
发表日期	2020
ISSN	2169897X
卷号	125 期号:9
英文摘要	Air pollution has been a hazard in China over recent decades threatening the health of half a billion people. Much effort has been devoted to mitigating air pollution in China leading to a significant reduction in primary pollutants emissions from 2013 to 2017, while a continuously worsening trend of surface ozone (O3, a secondary pollutant and greenhouse gas) was observed over the same period. Atmospheric oxidation, dominated by daytime reactions involving hydroxyl radicals (OH), is the critical process to convert freshly-emitted compounds into secondary pollutants, and is underestimated in current models of China's air pollution. Halogens (chlorine, bromine, and iodine) are known to profoundly influence oxidation chemistry in the marine environment; however, their impact on atmospheric oxidation and air pollution in China is unknown. In the present study, we report for the first time that halogens substantially enhance the total atmospheric oxidation capacity in polluted areas of China, typically 10% to 20% (up to 87% in winter) and mainly by significantly increasing OH level. The enhanced oxidation along the coast is driven by oceanic emissions, and that over the inland areas by anthropogenic emission. The extent and seasonality of halogen impact are largely explained by the dynamics of Asian monsoon, location and intensity of halogen emissions, and O3 formation regime. The omission of halogen emissions and chemistry may lead to significant errors in historical re-assessments and future projections of the evolution of atmospheric oxidation in polluted regions. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	air qualityS; China; oxidation; reactive halogen; WRF-Chem
语种	英语
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/186019
作者单位	Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, CSIC, Madrid, Spain; Now at Institute of Environmental Science and Technology (ICTA), Universitat Autònoma de Barcelona (UAB), Barcelona, Spain; Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong; National Exposure Research Laboratory, Environmental Protection Agency, Research Triangle ParkNC, United States; Atmospheric and Oceanic Sciences, Princeton University, Princeton, NJ, United States; Geophysical Fluid Dynamics Laboratory, National Oceanic and Atmospheric Administration, Princeton, NJ, United States; Now at Department of Meteorology and Atmospheric Science, The Pennsylvania State University, University ParkPA, United States; Department of Earth System Science, Tsinghua University, Beijing, China; Division of Environment and Sustainability, Hong Kong University of Science and Technology, Hong Kong; Department of Environmental Science and Engineering, Fudan Uni...
推荐引用方式 GB/T 7714	Li Q.,Badia A.,Wang T.,et al. Potential Effect of Halogens on Atmospheric Oxidation and Air Quality in China[J],2020,125(9).
APA	Li Q..,Badia A..,Wang T..,Sarwar G..,Fu X..,...&Saiz-Lopez A..(2020).Potential Effect of Halogens on Atmospheric Oxidation and Air Quality in China.Journal of Geophysical Research: Atmospheres,125(9).
MLA	Li Q.,et al."Potential Effect of Halogens on Atmospheric Oxidation and Air Quality in China".Journal of Geophysical Research: Atmospheres 125.9(2020).