气候变化领域集成服务门户(CCPortal): Characteristics of summertime ambient VOCs and their contributions to O3 and SOA formation in a suburban area of Nanjing; China

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DOI	10.1016/j.atmosres.2020.104923
	Characteristics of summertime ambient VOCs and their contributions to O3 and SOA formation in a suburban area of Nanjing; China
	Mozaffar A.; Zhang Y.-L.; Fan M.; Cao F.; Lin Y.-C.
发表日期	2020
ISSN	0169-8095
卷号	240
英文摘要	Hourly concentrations of 89 volatile organic compounds (VOCs) together with other atmospheric trace gases like ozone (O3), oxides of nitrogen (NOx), carbon monoxide (CO), and sulfur dioxide (SO2) were measured continuously in a suburban area of Nanjing, China. The investigations were conducted during the summer, 2018 to better characterize airborne VOC and their influence on O3 and secondary organic aerosols (SOA) formation. The average hourly total VOCs (TVOCs) concentration was 35 ± 21 ppbv which was mainly contributed by different alkanes (41%) followed by halohydrocarbons and oxygenated volatile organic compounds (31%), aromatics (16%), alkenes (9%), and alkyne (3%). The TVOCs concentration was in a similar range with the ones observed in other urban and suburban areas in China. Traffic had an important influence on the air quality in the study area as the diurnal variation of the trace gases depicted a bimodal distribution that coincides with the rush-hours. The O3 concentrations exceeded both the national and international air quality standards. The VOC:NOx was much higher than 8:1, indicating ambient air was NOx limited to atmospheric O3 formation, therefore, reduction of NOx concentration could reduce O3 formation rates more effectively. The average hourly ozone formation potential (OFP) of the VOCs was 218 μg m−3 and the major contributors to it were aromatics (43%) and alkenes (23%). The average hourly secondary organic aerosol formation potential (SOAFP) of the VOCs was 0.9 μg m−3. Similar to the OFP, aromatic VOCs were the major contributors to the total SOAFP. To improve the air quality in the study area traffic emissions as well as the aromatic and alkene VOCs emissions reduction are necessary. © 2020 Elsevier B.V.
英文关键词	China; NOx; O3; SOA; Suburban; VOC
语种	英语
scopus关键词	Aerosols; Air quality; Air quality standards; Aromatic compounds; Aromatization; Carbon monoxide; Emission control; Gases; Olefins; Ozone; Sulfur dioxide; Volatile organic compounds; Atmospheric trace gas; Bimodal distribution; China; Emissions reduction; Ozone formation potentials; Secondary organic aerosols; Suburban; Urban and suburban areas; Nitrogen oxides; aerosol; air quality; concentration (composition); nitrogen oxides; ozone; suburban area; sulfur compound; summer; volatile organic compound; China; Jiangsu; Nanjing [Jiangsu]
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/141939
作者单位	Yale-NUIST Center on Atmospheric Environment, International Joint Laboratory on Climate and Environment Change, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Key Laboratory of Meteorological Disaster, Ministry of Education & Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Jiangsu Provincial Key Laboratory of Agricultural Meteorology, College of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing, 210044, China
推荐引用方式 GB/T 7714	Mozaffar A.,Zhang Y.-L.,Fan M.,et al. Characteristics of summertime ambient VOCs and their contributions to O3 and SOA formation in a suburban area of Nanjing; China[J],2020,240.
APA	Mozaffar A.,Zhang Y.-L.,Fan M.,Cao F.,&Lin Y.-C..(2020).Characteristics of summertime ambient VOCs and their contributions to O3 and SOA formation in a suburban area of Nanjing; China.Atmospheric Research,240.
MLA	Mozaffar A.,et al."Characteristics of summertime ambient VOCs and their contributions to O3 and SOA formation in a suburban area of Nanjing; China".Atmospheric Research 240(2020).