Fates of secondary organic aerosols in the atmosphere identified fromcompound-specific dual-carbon isotope analysis of oxalic acid

doi:10.5194/acp-23-1565-2023

	Xu, Buqing 1,2; Tang, Jiao 1,2; Tang, Tiangang 1,3; Zhao, Shizhen 1,2; Zhong, Guangcai 1,2; Zhu, Sanyuan 1,2; Li, Jun1,2 ; Zhang, Gan1,2
	Fates of secondary organic aerosols in the atmosphere identified fromcompound-specific dual-carbon isotope analysis of oxalic acid
Source Publication	ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN	1680-7316
	2023-01-27
Volume	23 Issue:2 Pages:1565-1578
DOI	10.5194/acp-23-1565-2023
Language	英语
WOS Research Area	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
Abstract	Secondary organic aerosols (SOAs) are important components of fine particulates in the atmosphere. However, the sources of SOA precursor and atmospheric processes affecting SOAs are poorly understood. This limits our abilities to improve air quality and model aerosol-mediated climate forcing. Here, we use novel compound-specific dual-carbon isotope fingerprints (delta C-14 and delta C-13) for individual SOA tracer molecules (i.e., oxalic acid) to investigate the fates of SOAs in the atmosphere at five emission hotspots in China. Coal combustion and vehicle exhaust accounted for similar to 55 % of the sources of carbon in oxalic acid in Beijing and Shanghai, but biomass burning and biogenic emissions accounted for similar to 70 % of the sources of carbon in oxalic acid in Chengdu, Guangzhou, and Wuhan during the sampling period. The dual-carbon isotope signatures of oxalic acid and bulk organic carbon pools (e.g., water-soluble organic carbon) were compared to investigate the fates of SOAs in the atmosphere. Photochemical aging and aqueous-phase chemical processes dominate the formation of oxalic acid in summer and in winter, respectively. The results indicated that SOA carbon sources and chemical processes producing SOAs vary spatially and seasonally, and these variations need to be included in Chinese climate projection models and air quality management practices.
WOS ID	WOS:000923015100001
Indexed By	SCI
Citation statistics	Cited Times:5[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.gig.ac.cn/handle/344008/72653
Collection	有机地球化学国家重点实验室
Corresponding Author	Zhang, Gan
Affiliation	1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China 2.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Peoples R China
Recommended Citation GB/T 7714	Xu, Buqing,Tang, Jiao,Tang, Tiangang,et al. Fates of secondary organic aerosols in the atmosphere identified fromcompound-specific dual-carbon isotope analysis of oxalic acid[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2023,23(2):1565-1578.
APA	Xu, Buqing.,Tang, Jiao.,Tang, Tiangang.,Zhao, Shizhen.,Zhong, Guangcai.,...&Zhang, Gan.(2023).Fates of secondary organic aerosols in the atmosphere identified fromcompound-specific dual-carbon isotope analysis of oxalic acid.ATMOSPHERIC CHEMISTRY AND PHYSICS,23(2),1565-1578.
MLA	Xu, Buqing,et al."Fates of secondary organic aerosols in the atmosphere identified fromcompound-specific dual-carbon isotope analysis of oxalic acid".ATMOSPHERIC CHEMISTRY AND PHYSICS 23.2(2023):1565-1578.

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