气候变化领域集成服务门户(CCPortal): Spatiotemporal variation, sources, and secondary transformation potential of volatile organic compounds in Xi'an, China

CCPortal

DOI	10.5194/acp-21-4939-2021
	Spatiotemporal variation, sources, and secondary transformation potential of volatile organic compounds in Xi'an, China
	Song M.; Li X.; Yang S.; Yu X.; Zhou S.; Yang Y.; Chen S.; Dong H.; Liao K.; Chen Q.; Lu K.; Zhang N.; Cao J.; Zeng L.; Zhang Y.
发表日期	2021
ISSN	1680-7316
起始页码	4939
结束页码	4958
卷号	21 期号:6
英文摘要	As critical precursors of ozone (O3) and secondary organic aerosols, volatile organic compounds (VOCs) play a vital role in air quality, human health, and climate change. In this study, a campaign of comprehensive field observations and VOC grid sampling was conducted in Xi'an, China, from 20 June to 20 July 2019 to identify the spatiotemporal concentration levels, sources, and secondary transformation potential of VOCs. During the observation period, the average VOC concentrations at the Chanba (CB), Di Huan Suo (DHS), Qinling (QL), and gridded sampling sites were 27.8 ± 8.9, 33.8 ± 10.5, 15.5 ± 5.8, and 29.1 ± 8.4 ppb, respectively. Vehicle exhaust was the primary source of VOC emissions in Xi'an, and the contributions of vehicle exhaust to VOCs at the CB, DHS, and QL sites were 41.3 %, 30.6 %, and 23.6 %-41.4 %, respectively. While industrial emissions were the second-largest source of VOCs in urban areas, contributions from aging sources were high in rural areas. High potential source contribution function values primarily appeared in eastern and southern Xi'an near the sampling site, which indicates that Xi'an exhibits a strong local VOC source. Moreover, alkenes, aromatics, and oxygenated VOCs played a dominant role in secondary transformation, which is a major concern in reducing O3 pollution in Xi'an. © 2021 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	aerosol; air quality; atmospheric pollution; concentration (composition); emission inventory; industrial emission; ozone; pollutant source; spatial variation; spatiotemporal analysis; temporal variation; volatile organic compound; China; Shaanxi; Xian
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/247013
作者单位	State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China; Key Laboratory of Aerosol Chemistry and Physics, SKLLQG, Institute of Earth Environment, Chinese Academy of Science, Xi'an, 710061, China
推荐引用方式 GB/T 7714	Song M.,Li X.,Yang S.,et al. Spatiotemporal variation, sources, and secondary transformation potential of volatile organic compounds in Xi'an, China[J],2021,21(6).
APA	Song M..,Li X..,Yang S..,Yu X..,Zhou S..,...&Zhang Y..(2021).Spatiotemporal variation, sources, and secondary transformation potential of volatile organic compounds in Xi'an, China.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(6).
MLA	Song M.,et al."Spatiotemporal variation, sources, and secondary transformation potential of volatile organic compounds in Xi'an, China".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.6(2021).