气候变化领域集成服务门户(CCPortal): Nighttime chemistry of biomass burning emissions in urban areas: A dual mobile chamber study

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DOI	10.5194/acp-21-15337-2021
	Nighttime chemistry of biomass burning emissions in urban areas: A dual mobile chamber study
	Jorga S.D.; Florou K.; Kaltsonoudis C.; Kodros J.K.; Vasilakopoulou C.; Cirtog M.; Fouqueau A.; Picquet-Varrault B.; Nenes A.; Pandis S.N.
发表日期	2021
ISSN	1680-7316
起始页码	15337
结束页码	15349
卷号	21 期号:19
英文摘要	Residential biomass burning for heating purposes is an important source of air pollutants during winter. Here we test the hypothesis that significant secondary organic aerosol production can take place even during winter nights through oxidation of the emitted organic vapors by the nitrate (NO3) radical produced during the reaction of ozone and nitrogen oxides. We use a mobile dual smog chamber system which allows the study of chemical aging of ambient air against a control reference. Ambient urban air sampled during a wintertime campaign during nighttime periods with high concentrations of biomass burning emissions was used as the starting point for the aging experiments. Biomass burning organic aerosol (OA) was, on average, 70% of the total OA at the beginning of our experiments. Ozone was added in the perturbed chamber to simulate mixing with background air (and subsequent NO3 radical production and aging), while the second chamber was used as a reference. Following the injection of ozone, rapid OA formation was observed in all experiments, leading to increases in the OA concentration by 20%-70%. The oxygen-to-carbon ratio of the OA increased on average by 50%, and the mass spectra of the produced OA was quite similar to the oxidized OA mass spectra reported during winter in urban areas. Furthermore, good correlation was found for the OA mass spectra between the ambient-derived emissions in this study and the nocturnal aged laboratory-derived biomass burning emissions from previous work. Concentrations of NO3 radicals as high as 25ppt (parts per trillion) were measured in the perturbed chamber, with an accompanying production of 0.1-3.2μgm-3 of organic nitrate in the aerosol phase. Organic nitrate represented approximately 10% of the mass of the secondary OA formed. These results strongly indicate that the OA in biomass burning plumes can chemically evolve rapidly even during wintertime periods with low photochemical activity. © 2021 Spiro D. Jorga et al.
语种	英语
scopus关键词	aerosol; atmospheric chemistry; atmospheric pollution; biomass burning; concentration (composition); emission; nitrate; urban area
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/246504
作者单位	Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, United States; Institute of Chemical Engineering Sciences, ICE-HT, Patras, 26504, Greece; Department of Chemical Engineering, University of Patras, Patras, 26504, Greece; School of Architecture Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, 1015, Switzerland; Lisa, Umr Cnrs 7583, Université Paris-Est Créteil, Université de Paris, Institut Pierre Simon Laplace (IPSL), Créteil, France; Laboratoire National de Métrologie et d'Essais (LNE), Paris, 75015, France
推荐引用方式 GB/T 7714	Jorga S.D.,Florou K.,Kaltsonoudis C.,et al. Nighttime chemistry of biomass burning emissions in urban areas: A dual mobile chamber study[J],2021,21(19).
APA	Jorga S.D..,Florou K..,Kaltsonoudis C..,Kodros J.K..,Vasilakopoulou C..,...&Pandis S.N..(2021).Nighttime chemistry of biomass burning emissions in urban areas: A dual mobile chamber study.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(19).
MLA	Jorga S.D.,et al."Nighttime chemistry of biomass burning emissions in urban areas: A dual mobile chamber study".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.19(2021).