气候变化领域集成服务门户(CCPortal): Measurement report: Dual-carbon isotopic characterization of carbonaceous aerosol reveals different primary and secondary sources in Beijing and Xi'an during severe haze events

CCPortal

DOI	10.5194/acp-20-16041-2020
	Measurement report: Dual-carbon isotopic characterization of carbonaceous aerosol reveals different primary and secondary sources in Beijing and Xi'an during severe haze events
	Ni H.; Huang R.-J.; Cosijn M.M.; Yang L.; Guo J.; Cao J.; Dusek U.
发表日期	2020
ISSN	1680-7316
起始页码	16041
结束页码	16053
卷号	20 期号:24
英文摘要	To mitigate haze pollution in China, a better understanding of the sources of carbonaceous aerosols is required due to the complexity in multiple emissions and atmospheric processes. Here we combined the analysis of radiocarbon and the stable isotope 13C to investigate the sources and formation of carbonaceous aerosols collected in two Chinese megacities (Beijing and Xi'an) during severe haze events of a "red alarm"level from December 2016 to January 2017. The haze periods with daily PM2:5 concentrations as high as ∼400 μgm-3 were compared to subsequent clean periods (i.e., PM2:5 less than median concentrations during the winter 2016/2017) with PM2:5 concentrations below 100 μgm-3 in Xi'an and below 20 μgm-3 in Beijing. In Xi'an, liquid fossil fuel combustion was the dominant source of elemental carbon (EC; 44 %-57 %), followed by biomass burning (25 %-29 %) and coal combustion (17 %-29 %). In Beijing, coal combustion contributed 45 %-61% of EC, and biomass burning (17 %-24 %) and liquid fossil fuel combustion (22 %-33 %) contributed less. Non-fossil sources contributed 51 %-56% of organic carbon (OC) in Xi'an, and fossil sources contributed 63 %-69% of OC in Beijing. Secondary OC (SOC) was largely contributed by non-fossil sources in Xi'an (56∼6 %) and by fossil sources in Beijing (75∼10 %), especially during haze periods. The fossil vs. non-fossil contributions to OC and EC did not change drastically during haze events in both Xi'an and Beijing. However, compared to clean periods, the contribution of coal combustion to EC during haze periods increased in Xi'an and decreased in Beijing. During clean periods, primary OC from biomass burning and fossil sources constituted ∼70% of OC in Xi'an and ∼53% of OC in Beijing. From clean to haze periods, the contribution of SOC to total OC increased in Xi'an but decreased in Beijing, suggesting that the contribution of secondary organic aerosol formation to increased OC during haze periods was more efficient in Xi'an than in Beijing. In Beijing, the high SOC fraction in total OC during clean periods was mainly due to an elevated contribution from non-fossil SOC. In Xi'an, a slight day-night difference was observed during the clean period with enhanced fossil contributions to OC and EC during the day. This day-night difference was negligible during severe haze periods, likely due to the enhanced accumulation of pollutants under stagnant weather conditions. © Author(s) 2020.
语种	英语
scopus关键词	aerosol; carbon isotope; concentration (composition); haze; isotopic composition; particulate matter; source apportionment; Beijing [Beijing (ADS)]; Beijing [China]; China; Xian
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/247257
作者单位	State Key Laboratory of Loess and Quaternary Geology, Center for Excellence in Quaternary Science and Global Change, Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; Centre for Isotope Research (CIO), Energy and Sustainability Research Institute Groningen (ESRIG), University of Groningen, Groningen, 9747 AG, Netherlands; Institute of Global Environmental Change, Xi'An Jiaotong University, Xi'an, 710049, China
推荐引用方式 GB/T 7714	Ni H.,Huang R.-J.,Cosijn M.M.,et al. Measurement report: Dual-carbon isotopic characterization of carbonaceous aerosol reveals different primary and secondary sources in Beijing and Xi'an during severe haze events[J],2020,20(24).
APA	Ni H..,Huang R.-J..,Cosijn M.M..,Yang L..,Guo J..,...&Dusek U..(2020).Measurement report: Dual-carbon isotopic characterization of carbonaceous aerosol reveals different primary and secondary sources in Beijing and Xi'an during severe haze events.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(24).
MLA	Ni H.,et al."Measurement report: Dual-carbon isotopic characterization of carbonaceous aerosol reveals different primary and secondary sources in Beijing and Xi'an during severe haze events".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.24(2020).