气候变化领域集成服务门户(CCPortal): Fates of secondary organic aerosols in the atmosphere identified fromcompound-specific dual-carbon isotope analysis of oxalic acid

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DOI	10.5194/acp-23-1565-2023
	Fates of secondary organic aerosols in the atmosphere identified fromcompound-specific dual-carbon isotope analysis of oxalic acid
	Xu, Buqing; Tang, Jiao; Tang, Tiangang; Zhao, Shizhen; Zhong, Guangcai; Zhu, Sanyuan; Li, Jun; Zhang, Gan
发表日期	2023
ISSN	1680-7316
EISSN	1680-7324
起始页码	1565
结束页码	1578
卷号	23 期号:2 页码:14
英文摘要	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.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000923015100001
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/273539
作者单位	Chinese Academy of Sciences; Guangzhou Institute of Geochemistry, CAS; Chinese Academy of Sciences; Institute of Subtropical Agriculture, CAS
推荐引用方式 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],2023,23(2):14.
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),14.
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):14.