气候变化领域集成服务门户(CCPortal): Estimation of Secondary Organic Aerosol Formation During a Photochemical Smog Episode in Shanghai, China

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DOI	10.1029/2019JD032033
	Estimation of Secondary Organic Aerosol Formation During a Photochemical Smog Episode in Shanghai, China
	Wang H.; Wang Q.; Gao Y.; Zhou M.; Jing S.; Qiao L.; Yuan B.; Huang D.; Huang C.; Lou S.; Yan R.; de Gouw J.A.; Zhang X.; Chen J.; Chen C.; Tao S.; An J.; Li Y.
发表日期	2020
ISSN	2169897X
卷号	125 期号:7
英文摘要	Secondary organic aerosols (SOA) are formed through diverse processes in the atmosphere, among which photochemical processing is one important pathway. SOA formation was studied based on one heavy photochemical smog episode in summer in Shanghai. During the pollution episode, ozone and organic carbon (OC) increased simultaneously with a strong positive correlation, which was complete opposite to the volatile organic compounds (VOCs) pattern but similar to that of VOC photochemical consumption. The OC evolution was explained well by a parameterization method based on the observation of OC and VOCs, and secondary OC (SOC) formation was derived, being comparable with the result based on elemental carbon (EC) tracer method. About 67% of SOC could be explained by the photochemical consumption of VOCs (mainly aromatics, ~93%) during the episode. The contribution of VOCs to SOC formation was also estimated from the available VOC emissions inventories, which was comparable with that based on VOCs observations in ambient. Some differences of VOC species contribution to SOC were found between the ambient observation-based and the emission-based results, and the contribution of C9 aromatics was underestimated in the emission inventory. This suggests that bias of speciation might exist in the current VOC emissions inventories. The present study highlights the importance of VOC oxidation for SOC formation in summer in Shanghai. More insights are needed to improve the accuracy of VOCs speciated emissions inventories. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	photochemistry; secondary organic aerosols; Shanghai; volatile organic compounds
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/186064
作者单位	State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex, Shanghai Academy of Environmental Sciences, Shanghai, China; Institute for Environmental and Climate Research, Jinan University, Guangzhou, China; Department of Chemistry and Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States; Atmospheric Chemistry Observation and Modeling Laboratory (ACOM), National Center for Atmospheric Research (NCAR), Boulder, CO, United States; Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Institute of Atmospheric Sciences, Fudan University, Shanghai, China
推荐引用方式 GB/T 7714	Wang H.,Wang Q.,Gao Y.,et al. Estimation of Secondary Organic Aerosol Formation During a Photochemical Smog Episode in Shanghai, China[J],2020,125(7).
APA	Wang H..,Wang Q..,Gao Y..,Zhou M..,Jing S..,...&Li Y..(2020).Estimation of Secondary Organic Aerosol Formation During a Photochemical Smog Episode in Shanghai, China.Journal of Geophysical Research: Atmospheres,125(7).
MLA	Wang H.,et al."Estimation of Secondary Organic Aerosol Formation During a Photochemical Smog Episode in Shanghai, China".Journal of Geophysical Research: Atmospheres 125.7(2020).