气候变化领域集成服务门户(CCPortal): Temporal trends of the concentration and sources of secondary organic aerosols in PM2.5 in Shanghai during 2012 and 2018

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DOI	10.1016/j.atmosenv.2021.118596
	Temporal trends of the concentration and sources of secondary organic aerosols in PM2.5 in Shanghai during 2012 and 2018
	Zhong Y.; Chen J.; Zhao Q.; Zhang N.; Feng J.; Fu Q.
发表日期	2021
ISSN	1352-2310
卷号	261
英文摘要	Based on the concentrations of the carbonaceous components and the typical organic tracers in 682 p.m.2.5 samples collected in Shanghai from 2012 to 2018, the temporal trends of the concentrations and potential sources of the secondary organic aerosols in PM2.5 in Shanghai were investigated. The annual average concentrations of organic carbon (OC), elemental carbon (EC) and water-soluble organic carbon (WSOC) all showed a decreasing trend along with the PM2.5 concentration. The annual concentration of total carbon (TC) in 2018 (4.3 μg m−3) was about 34% of that in 2012. Compared with that in 2013, the concentrations of isoprene and sesquiterpene SOA tracers in 2018 decreased by 48% and 43%. Meanwhile, the concentration of monoterpene SOA tracers kept stable in 2 ng m−3 to 3 ng m−3, and the concentration of toluene SOA tracer decreased slightly from 1.3 ng m−3 in 2013 to 1.0 ng m−3 in 2018. Correlation analysis with levoglucosan suggested that biomass burning should be an important source of sesquitertene in Shanghai. It was found that the 2-MGA/2-MTLs ratio of the isoprene tracers was more strongly affected by the ambient temperature but not NOx in Shanghai. The concentration of secondary organic carbon (SOC) estimated with OC/EC-based, WSOC-based and tracer-based methods showed a decreasing trend during the study period, but the contribution of SOC to OC was increasing. Anthropogenic aromatic volatile organic compounds was the increasingly important contributor to the SOC in PM2.5, and should be the key pollutants to be controlled to further improve the air quality in Shanghai. © 2021 Elsevier Ltd
关键词	Organic tracer PM2.5 Secondary organic carbon Shanghai Temporal trend
语种	英语
scopus关键词	Aerosols; Air quality; Isoprene; Monoterpenes; Quality control; Volatile organic compounds; Carbon-based; Elemental carbon; Organic aerosol; Organic tracers; Organics; PM$-2.5$; Secondary organic carbon; Shanghai; Temporal trends; Water-soluble organic carbon; Organic carbon; 2 methylerythritol; 2 methylglyceric acid; 2 methylthreitol; 2,3 dihydroxy 4 oxo pentanoic acid; 3 hydroxy 4,4 dimethyl glutaric acid; 3 hydroxyglutaric acid; 3 methyl 1,2,3 butane tricarboxylic acid; 3 methyl 2,3,5 trihydroxy 1 butene; alkene derivative; aromatic compound; carbon; caryophyllene; cis 2 methyl 1,3,4 trihydroxy 1 butene; isoprene; levoglucosan; monoterpene; organic carbon; pinene; sesquiterpene; toluene; tracer; trans 2 methyl 1,3,4 trihydroxy 1 butene; unclassified drug; volatile organic compound; water soluble organic carbon; aerosol; air quality; biomass burning; concentration (composition); monoterpene; particulate matter; temporal analysis; toluene; air pollutant; air pollution control; air quality control; Article; autumn; biomass burning; chemical composition; China; combustion; comparative study; concentration (parameter); correlation analysis; ecological procedures; environmental temperature; fire ecology; oxidation; particulate matter 2.5; seasonal variation; secondary organic aerosol; spring; summer; total organic carbon; trend study; winter; China; Shanghai
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248312
作者单位	School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China; Shanghai Environmental Monitoring Center, Shanghai, 200235, China
推荐引用方式 GB/T 7714	Zhong Y.,Chen J.,Zhao Q.,et al. Temporal trends of the concentration and sources of secondary organic aerosols in PM2.5 in Shanghai during 2012 and 2018[J],2021,261.
APA	Zhong Y.,Chen J.,Zhao Q.,Zhang N.,Feng J.,&Fu Q..(2021).Temporal trends of the concentration and sources of secondary organic aerosols in PM2.5 in Shanghai during 2012 and 2018.ATMOSPHERIC ENVIRONMENT,261.
MLA	Zhong Y.,et al."Temporal trends of the concentration and sources of secondary organic aerosols in PM2.5 in Shanghai during 2012 and 2018".ATMOSPHERIC ENVIRONMENT 261(2021).