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DOI	10.5194/acp-19-617-2019
	Characterization of VOCs and their related atmospheric processes in a central Chinese city during severe ozone pollution periods
	Li B.; Ho S.S.H.; Gong S.; Ni J.; Li H.; Han L.; Yang Y.; Qi Y.; Zhao D.
发表日期	2019
ISSN	16807316
起始页码	617
结束页码	638
卷号	19 期号:1
英文摘要	A 5-month campaign (from May to September 2017) was conducted to characterize volatile organic compounds (VOCs) for the first time at four sites in Zhengzhou, Henan Province, China, where ground level ozone (O 3 ) concentration has shown an increasing trend in recent years. Canister samples were collected for the measurement of 57 VOCs, which, along with reactive nitrogen oxides (NO x ), are the most important O 3 precursors. During the same period, O 3 and its precursor gases were monitored online simultaneously. The results indicated that the average mixing ratio of total quantified VOCs (σ VOCs = 28.8 ± 22:1 ppbv) in Zhengzhou was lower than that in the other Chinese megacities, while alkyne comprised a higher proportion of σ VOCs . The abundances, compositions and ratios of typical VOCs showed clear spatial and temporal variations. Cluster analysis indicates that air masses from the south of Zhengzhou were cleaner than from other directions. The molar ratio of VOCs to NO x indicated that, in general, O 3 formation was more sensitive to VOCs than NO x formation in Zhengzhou. The source apportionment was conducted with positive matrix factorization (PMF), and it was found that vehicle exhaust, coal and biomass burning and solvent usage were the major sources for ambient VOCs at all four sites. From potential source contribution function (PSCF) analysis, the strong emissions from coal+biomass burning and solvent usage were concentrated in the southwest of Shanxi and Henan provinces. This study gathers scientific evidence on the pollution sources for Zhengzhou, benefiting the government to establish efficient environmental control measures, particularly for O 3 pollution. © 2019 Author(s).
语种	英语
scopus关键词	cluster analysis; concentration (composition); megacity; nitrogen oxides; ozone; source apportionment; spatiotemporal analysis; volatile organic compound; China; Henan; Zhengzhou
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/144719
作者单位	Langfang Academy of Eco Industrialization for Wisdom Environment, Langfang, 065000, China; Division of Atmospheric Sciences, Desert Research Institute, Reno, NV, United States; Key Lab of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; Center for Atmosphere Watch and Services of CMA, Chinese Academy of Meteorological Sciences, Beijing, 100081, China
推荐引用方式 GB/T 7714	Li B.,Ho S.S.H.,Gong S.,et al. Characterization of VOCs and their related atmospheric processes in a central Chinese city during severe ozone pollution periods[J],2019,19(1).
APA	Li B..,Ho S.S.H..,Gong S..,Ni J..,Li H..,...&Zhao D..(2019).Characterization of VOCs and their related atmospheric processes in a central Chinese city during severe ozone pollution periods.Atmospheric Chemistry and Physics,19(1).
MLA	Li B.,et al."Characterization of VOCs and their related atmospheric processes in a central Chinese city during severe ozone pollution periods".Atmospheric Chemistry and Physics 19.1(2019).