气候变化领域集成服务门户(CCPortal): Source apportionment of carbonaceous aerosols in Beijing with radiocarbon and organic tracers: Insight into the differences between urban and rural sites

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DOI	10.5194/acp-21-8273-2021
	Source apportionment of carbonaceous aerosols in Beijing with radiocarbon and organic tracers: Insight into the differences between urban and rural sites
	Hou S.; Liu D.; Xu J.; Vu T.V.; Wu X.; Srivastava D.; Fu P.; Li L.; Sun Y.; Vlachou A.; Moschos V.; Salazar G.; Szidat S.; Prévôt A.S.H.; Harrison R.M.; Shi Z.
发表日期	2021
ISSN	1680-7316
起始页码	8273
结束页码	8292
卷号	21 期号:10
英文摘要	Carbonaceous aerosol is a dominant component of fine particles in Beijing. However, it is challenging to apportion its sources. Here, we applied a newly developed method which combined radiocarbon (14C) with organic tracers to apportion the sources of fine carbonaceous particles at an urban (IAP) and a rural (PG) site of Beijing. PM2:5 filter samples (24 h) were collected at both sites from 10 November to 11 December 2016 and from 22 May to 24 June 2017. 14C was determined in 25 aerosol samples (13 at IAP and 12 at PG) representing low pollution to haze conditions. Biomass burning tracers (levoglucosan, mannosan, and galactosan) in the samples were also determined using gas chromatography mass spectrometry (GC-MS). Higher contributions of fossil-derived OC (OCf) were found at the urban site. The OCf/OC ratio decreased in the summer samples (IAP: 67.8 ± 4.0 % in winter and 54.2 ± 11.7 % in summer; PG: 59.3 ± 5.7 % in winter and 50.0 ± 9.0 % in summer) due to less consumption of coal in the warm season. A novel extended Gelencsér (EG) method incorporating the 14C and organic tracer data was developed to estimate the fossil and non-fossil sources of primary and secondary OC (POC and SOC). It showed that fossil-derived POC was the largest contributor to OC (35.8 ± 10.5 % and 34.1 ± 8.7 % in wintertime for IAP and PG, 28.9 ± 7.4 % and 29.1 ± 9.4 % in summer), regardless of season. SOC contributed 50.0 ± 12.3 % and 47.2 ± 15.5 % at IAP and 42.0 ± 11.7 % and 43.0 ± 13.4 % at PG in the winter and summer sampling periods, respectively, within which the fossil-derived SOC was predominant and contributed more in winter. The non-fossil fractions of SOC increased in summer due to a larger biogenic component. Concentrations of biomass burning OC (OCbb) are resolved by the extended Gelencsér method, with average contribu tions (to total OC) of 10.6 ± 1.7 % and 10.4 ± 1.5 % in winter at IAP and PG and 6.5 ± 5.2 % and 17.9 ± 3.5 % in summer, respectively. Correlations of water-insoluble OC (WINSOC) and water-soluble OC (WSOC) with POC and SOC showed that although WINSOC was the major contributor to POC, a non-negligible fraction of WINSOC was found in SOC for both fossil and non-fossil sources, especially during winter. In summer, a greater proportion of WSOC from non-fossil sources was found in SOC. Comparisons of the source apportionment results with those obtained from a chemical mass balance model were generally good, except for the cooking aerosol. © 2021 Siqi Hou et al.
语种	英语
scopus关键词	aerosol; biomass burning; particulate matter; rural area; seasonal variation; source apportionment; tracer; urban area; 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/246849
作者单位	School of Geography Earth and Environmental Science, University of Birmingham, Birmingham, B15 2TT, United Kingdom; School of Earth Sciences and Resources, China University of Geosciences, Xueyuan Road 29, Beijing, 100083, China; Institute of Surface-Earth System Science, Tianjin University, Tianjin, 300072, China; State Key Laboratory of Atmospheric Boundary Layer Physics, Atmospheric Chemistry Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen PSI, 5232, Switzerland; Department of Chemistry and Biochemistry, Oeschger Centre for Climate Change Research, University of Bern, Bern, 3012, Switzerland; Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; School of Public Health, Imperial College London, London, United Kingdom; Department of Chemistry and Molecular Biology, University of Gothenburg, Gothenburg, 41296, Sweden; Department of Environmental Sciences, Centre o...
推荐引用方式 GB/T 7714	Hou S.,Liu D.,Xu J.,et al. Source apportionment of carbonaceous aerosols in Beijing with radiocarbon and organic tracers: Insight into the differences between urban and rural sites[J],2021,21(10).
APA	Hou S..,Liu D..,Xu J..,Vu T.V..,Wu X..,...&Shi Z..(2021).Source apportionment of carbonaceous aerosols in Beijing with radiocarbon and organic tracers: Insight into the differences between urban and rural sites.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(10).
MLA	Hou S.,et al."Source apportionment of carbonaceous aerosols in Beijing with radiocarbon and organic tracers: Insight into the differences between urban and rural sites".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.10(2021).