气候变化领域集成服务门户(CCPortal): Characteristics of PM2.5-bound secondary organic aerosol tracers in a coastal city in Southeastern China: Seasonal patterns and pollution identification

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DOI	10.1016/j.atmosenv.2020.117710
	Characteristics of PM2.5-bound secondary organic aerosol tracers in a coastal city in Southeastern China: Seasonal patterns and pollution identification
	Liu T.; Hu B.; Xu X.; Hong Y.; Zhang Y.; Wu X.; Xu L.; Li M.; Chen Y.; Chen X.; Chen J.
发表日期	2020
ISSN	1352-2310
卷号	237
英文摘要	Secondary organic aerosol (SOA) plays an important role in global climate change and air quality, and SOA tracers most directly characterize the sources and formation mechanisms of SOA. Four seasons of observation of SOA tracers was carried out in a coastal city of southeastern China. Fourteen PM2.5-bound SOA tracers, including isoprene (SOAI), α/β-pinene (SOAM), β-caryophyllene (SOAC), and toluene (SOAA), were measured using the GC–MS method. The concentrations of SOA tracers in Fuzhou were 25.9 ± 19.9 ng m−3 (SOAM), 7.45 ± 8.53 ng m−3 (SOAI), 3.15 ± 1.99 ng m−3 (SOAC), and 2.63 ± 1.54 ng m−3 (SOAA). The elevated SOAI concentration in summer was mainly controlled by high biogenic isoprene emission and strong oxidation, and biomass burning contributed strongly to DHOPA (SOAA) in fall. SO42− and H+insitu had an increased impact on later-generation SOAI products and low-NOx SOAM products. Based on the ratio of MGA/MTLs and MBTCA/(PA + PNA), atmospheric oxidation capacity (Ox, =NO2+O3) had a significant impact on the aerosol aging of SOA tracers. The increased proportions of low-NOx SOAI products were 3.23–7.21 times higher than those of high-NOx products from non-haze to haze periods, suggesting the influence of high SO42− concentration and RH on the reaction channel for SOAI formation. The percentages of later-generation SOAM products during RT were 2.46 times higher than those of first-generation products, suggesting the influence of aerosol aging during the regional transport. Both continental Asian outflow and biomass-burning plumes promoted precursor emissions and the formation process of SOA during the haze pollution events. These related findings help to understand the occurrence, sources and formation of SOA in coastal areas. © 2020 Elsevier Ltd
关键词	Air pollution Coastal area Formation mechanisms PM2.5 Secondary organic aerosol (SOA) tracers
语种	英语
scopus关键词	Aerosols; Air quality; Climate change; Isoprene; Nitrogen oxides; Atmospheric oxidation capacity; Formation mechanism; Global climate changes; Isoprene emission; Reaction channels; Regional transport; Secondary organic aerosols; Southeastern china; Atmospheric movements; beta pinene; caryophyllene; isoprene; pinene; toluene; aerosol; biomass burning; climate change; coastal zone; concentration (composition); global climate; haze; isoprene; organic compound; outflow; oxidation; particulate matter; pollutant transport; sulfate; toluene; air monitoring; air pollution; air quality control; air sampling; analytic method; Article; biomass; chemical analysis; China; haze; mass fragmentography; oxidation; particulate matter; photooxidation; priority journal; seashore; seasonal variation; secondary organic aerosol; China; Fujian; Fuzhou
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/249047
作者单位	Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; University of Chinese Academy of Sciences, Beijing, 100086, China; College of Resource and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, China; Fujian Environmental Monitoring Station, Fuzhou, 350001, China
推荐引用方式 GB/T 7714	Liu T.,Hu B.,Xu X.,et al. Characteristics of PM2.5-bound secondary organic aerosol tracers in a coastal city in Southeastern China: Seasonal patterns and pollution identification[J],2020,237.
APA	Liu T..,Hu B..,Xu X..,Hong Y..,Zhang Y..,...&Chen J..(2020).Characteristics of PM2.5-bound secondary organic aerosol tracers in a coastal city in Southeastern China: Seasonal patterns and pollution identification.ATMOSPHERIC ENVIRONMENT,237.
MLA	Liu T.,et al."Characteristics of PM2.5-bound secondary organic aerosol tracers in a coastal city in Southeastern China: Seasonal patterns and pollution identification".ATMOSPHERIC ENVIRONMENT 237(2020).