气候变化领域集成服务门户(CCPortal): Characterization of organic aerosols from a Chinese megacity during winter: Predominance of fossil fuel combustion

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DOI	10.5194/acp-19-5147-2019
	Characterization of organic aerosols from a Chinese megacity during winter: Predominance of fossil fuel combustion
	Haque M.M.; Kawamura K.; Deshmukh D.K.; Fang C.; Song W.; Mengying B.; Zhang Y.-L.
发表日期	2019
ISSN	16807316
起始页码	5147
结束页码	5164
卷号	19 期号:7
英文摘要	PM2:5 aerosol samples were collected from the Chinese megacity of Nanjing (32.21° N, 118.73° E) during winter and analyzed for a total of 127 compounds from 12 organic compound classes. The most abundant classes of compounds were n-alkanes (mean concentration of 205 ngm-3), followed by fatty acids (76.3 ngm-3), polycyclic aromatic hydrocarbons (PAHs; 64.3 ngm-3), anhydrosugars (56.3 ngm-3), fatty alcohols (40.5 ngm-3) and phthalate esters (15.2 ngm-3), whereas hydroxy-/polyacids (8.33 ngm-3), aromatic acids (7.35 ngm-3), hopanes (4.19 ngm-3), primary sugars and sugar alcohols (4.15 ngm-3), lignin and resin products (2.94 ngm-3), and steranes (2.46 ngm-3) were less abundant. The carbon preference index of n-alkanes (0.83-1.38) indicated that they had a strong fossil fuel combustion origin. Diagnostic concentration ratios of organic tracers suggested that PAHs and hopanes originated mostly from coal burning and traffic emissions, respectively, in the Nanjing urban area. Positive matrix factorization analysis demonstrated that fossil fuel combustion was the major pollution source (28.7 %), followed by emissions from biomass burning (17.1 %), soil dust (14.5 %) and plastic burning (6.83 %) for Nanjing winter aerosols, although the contribution of secondary oxidation products (32.9 %) was the most abundant. Most of the compounds generally showed higher concentrations at nighttime compared with daytime; this was due to the accumulation process associated with inversion layers and the enhancement of emissions from heavy trucks at night. We conclude that fossil fuel combustion largely influences the winter organic aerosols in urban Nanjing. Based on the comparison of this study's results with previous research, we found that pollution levels in organic aerosols have decreased in the urban Nanjing atmosphere over the last decade. © Author(s) 2019.
语种	英语
scopus关键词	aerosol; atmospheric chemistry; combustion; fossil fuel; megacity; organic compound; particulate matter; winter; China; Jiangsu; Nanjing [Jiangsu]
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/144477
作者单位	Yale-NUIST Center on Atmospheric Environment, Department of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Chubu Institute for Advanced Studies, Chubu University, Kasugai, 487-8501, Japan; Key Laboratory of Meteorological Disaster, Min. of Educ. and Collab. Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, 210044, China
推荐引用方式 GB/T 7714	Haque M.M.,Kawamura K.,Deshmukh D.K.,et al. Characterization of organic aerosols from a Chinese megacity during winter: Predominance of fossil fuel combustion[J],2019,19(7).
APA	Haque M.M..,Kawamura K..,Deshmukh D.K..,Fang C..,Song W..,...&Zhang Y.-L..(2019).Characterization of organic aerosols from a Chinese megacity during winter: Predominance of fossil fuel combustion.Atmospheric Chemistry and Physics,19(7).
MLA	Haque M.M.,et al."Characterization of organic aerosols from a Chinese megacity during winter: Predominance of fossil fuel combustion".Atmospheric Chemistry and Physics 19.7(2019).