气候变化领域集成服务门户(CCPortal): Size-segregated particle number and mass concentrations from different emission sources in urban Beijing

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DOI	10.5194/acp-20-12721-2020
	Size-segregated particle number and mass concentrations from different emission sources in urban Beijing
	Cai J.; Chu B.; Yao L.; Yan C.; Heikkinen L.M.; Zheng F.; Li C.; Fan X.; Zhang S.; Yang D.; Wang Y.; Kokkonen T.V.; Chan T.; Zhou Y.; Dada L.; Liu Y.; He H.; Paasonen P.; Kujansuu J.T.; Petäjä T.; Mohr C.; Kangasluoma J.; Bianchi F.; Sun Y.; Croteau P.L.; Worsnop D.R.; Kerminen V.-M.; Du W.; Kulmala M.; Daellenbach K.R.
发表日期	2020
ISSN	16807316
起始页码	12721
结束页码	12740
卷号	20 期号:21
英文摘要	Although secondary particulate matter is reported to be the main contributor of PM2:5 during haze in Chinese megacities, primary particle emissions also affect particle concentrations. In order to improve estimates of the contribution of primary sources to the particle number and mass concentrations, we performed source apportionment analyses using both chemical fingerprints and particle size distributions measured at the same site in urban Beijing from April to July 2018. Both methods resolved factors related to primary emissions, including vehicular emissions and cooking emissions, which together make up 76 % and 24 % of total particle number and organic aerosol (OA) mass, respectively. Similar source types, including particles related to vehicular emissions (1.6 ± 1.1 μgm-3; 2.4 ± 1.8 × 103 cm-3 and 5.5 ± 2.8 × 103 cm-3 for two traffic-related components), cooking emissions (2.6±1.9 μgm-3 and 5.5± 3.3×103 cm-3) and secondary aerosols (51±41 μgm-3 and 4.2±3.0×103 cm-3), were resolved by both methods. Converted mass concentrations from particle size distributions components were comparable with those from chemical fingerprints. Size distribution source apportionment separated vehicular emissions into a component with a mode diameter of 20 nm ("traffic-ultrafine") and a component with a mode diameter of 100 nm ("traffic-fine"). Consistent with similar day-and nighttime diesel vehicle PM2.5 emissions estimated for the Beijing area, traffic-fine particles, hydrocarbon-like OA (HOA, traffic-related factor resulting from source apportionment using chemical fingerprints) and black carbon (BC) showed similar diurnal patterns, with higher concentrations during the night and morning than during the afternoon when the boundary layer is higher. Traffic-ultrafine particles showed the highest concentrations during the rush-hour period, suggesting a prominent role of local gasoline vehicle emissions. In the absence of new particle formation, our results show that vehicular-related emissions (14 % and 30 % for ultrafine and fine particles, respectively) and cookingactivity-related emissions (32 %) dominate the particle number concentration, while secondary particulate matter (over 80 %) governs PM2.5 mass during the non-heating season in Beijing. © 2020 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	aerosol; black carbon; concentration (composition); haze; particle size; particulate matter; size distribution; source apportionment; traffic emission; urban area; Beijing [Beijing (ADS)]; Beijing [China]; China
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/143848
作者单位	Aerosol and Haze Laboratory, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China; Institute for Atmospheric and Earth System Research, Faculty of Science, University of Helsinki, Helsinki, 00014, Finland; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; School of Environment, Tsinghua University, Beijing, 100084, China; Department of Environmental Science, Stockholm University, Stockholm, 11418, Sweden; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; Aerodyne Research Inc., Billerica, MA 01821, United States
推荐引用方式 GB/T 7714	Cai J.,Chu B.,Yao L.,et al. Size-segregated particle number and mass concentrations from different emission sources in urban Beijing[J],2020,20(21).
APA	Cai J..,Chu B..,Yao L..,Yan C..,Heikkinen L.M..,...&Daellenbach K.R..(2020).Size-segregated particle number and mass concentrations from different emission sources in urban Beijing.Atmospheric Chemistry and Physics,20(21).
MLA	Cai J.,et al."Size-segregated particle number and mass concentrations from different emission sources in urban Beijing".Atmospheric Chemistry and Physics 20.21(2020).