气候变化领域集成服务门户(CCPortal): Strong regional transport of volatile organic compounds (VOCs) during wintertime in Shanghai megacity of China

CCPortal

DOI	10.1016/j.atmosenv.2020.117940
	Strong regional transport of volatile organic compounds (VOCs) during wintertime in Shanghai megacity of China
	Liu Y.; Wang H.; Jing S.; Peng Y.; Gao Y.; Yan R.; Wang Q.; Lou S.; Cheng T.; Huang C.
发表日期	2021
ISSN	1352-2310
卷号	244
英文摘要	Measurements of volatile organic compounds (VOCs) were performed as well as other pollutants in Shanghai in winter. The whole measurements were classified into three types of periods, including particulate pollution episodes (PPE), VOC pollution episodes (VPE), and relatively clean periods based on the pollution characteristics. Of these types, PPE have the highest fine particulate matter (PM2.5) mass concentrations and second-highest VOC concentrations, mainly impacted by the regional transport of aged air masses from the northwest. VPE generally concern long-lasting high concentrations of VOCs under stagnant atmospheric conditions due to the accumulation of local emissions. Five sources of VOCs were identified by the positive matrix factorization (PMF) model, and furthermore, the analysis of VOCs concentration weighted trajectory (CWT) was employed to investigate the potential source region and even to validate the source identification to some extent. As a result, VOCs in Shanghai in winter were mainly from solvent usage (23.9%), vehicle emissions mixed with some petrochemical emissions (24.7%), natural gas and background (23.6%), combustion-related to regional transport (22.1%), and secondary formation (5.7%). The regional transport, usually with large combustion sources, played more important roles (41.9%) in VOCs during PPE compared to VPE and clean periods. The contribution of local emissions like vehicle exhaust and petrochemical emissions increased during VPE compared to PPE and clean periods. Clean periods have low PM2.5 and low VOC concentrations, with a large contribution from the regional background. The present study highlighted the regional transport of VOCs should be taken into account for policymakers when making the city scale controlling measures. © 2020 Elsevier Ltd
关键词	Pollution periods Regional transport Source apportionment VOCs concentration Weighted trajectory Volatile organic compounds (VOCs)
语种	英语
scopus关键词	Combustion; Factorization; Gas emissions; Natural gas vehicles; Petrochemicals; Pollution; Volatile organic compounds; Atmospheric conditions; Combustion sources; Fine particulate matter (PM2.5); Particulate pollution; Pollution episodes; Positive matrix factorization models; Potential source regions; Source identification; Particles (particulate matter); natural gas; petrochemical agent; solvent; volatile organic compound; air mass; concentration (composition); exhaust emission; megacity; particulate matter; petrochemistry; seasonality; source identification; volatile organic compound; air pollution; Article; China; combustion; concentration (parameter); controlled study; exhaust gas; particulate matter 2.5; priority journal; urban area; winter; China; Shanghai
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248822
作者单位	State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex, Shanghai Academy of Environmental Sciences, Shanghai, 200233, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Institute of Atmospheric Sciences, Fudan University, Shanghai, 200438, China; Department of Atmospheric and Oceanic Sciences, Institute of Atmospheric Sciences, Fudan University, Shanghai, 200438, China; CMA-FDU Joint Laboratory of Marine Meteorology, Shanghai, 200438, China; Institute of Eco-Chongming (IEC), Shanghai, 200062, China
推荐引用方式 GB/T 7714	Liu Y.,Wang H.,Jing S.,et al. Strong regional transport of volatile organic compounds (VOCs) during wintertime in Shanghai megacity of China[J],2021,244.
APA	Liu Y..,Wang H..,Jing S..,Peng Y..,Gao Y..,...&Huang C..(2021).Strong regional transport of volatile organic compounds (VOCs) during wintertime in Shanghai megacity of China.ATMOSPHERIC ENVIRONMENT,244.
MLA	Liu Y.,et al."Strong regional transport of volatile organic compounds (VOCs) during wintertime in Shanghai megacity of China".ATMOSPHERIC ENVIRONMENT 244(2021).