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	Highly time-resolved urban aerosol characteristics during springtime in Yangtze River Delta, China: insights from soot particle aerosol mass spectrometry
	Wang, Junfeng1,2; Ge, Xinlei1; Chen, Yanfang1; Shen, Yafei1; Zhang, Qi1,3; Sun, Yele4; Xu, Jianzhong5; Ge, Shun6; Yu, Huan1; Chen, Mindong1
刊名	ATMOSPHERIC CHEMISTRY AND PHYSICS
	2016
卷号	16期号:14页码:9109-9127
ISSN号	1680-7316
DOI	10.5194/acp-16-9109-2016
通讯作者	Ge, Xinlei(caxinra@163.com) ; Chen, Mindong(chenmdnuist@163.com)
英文摘要	In this work, the Aerodyne soot particle - aerosol mass spectrometer (SP-AMS) was deployed for the first time during the spring of 2015 in urban Nanjing, a megacity in the Yangtze River Delta (YRD) of China, for online characterization of the submicron aerosols (PM1). The SP-AMS enables real-time and fast quantification of refractory black carbon (rBC) simultaneously with other non-refractory species (ammonium, sulfate, nitrate, chloride, and organics). The average PM1 concentration was found to be 28.2 mu g m(-3), with organics (45 %) as the most abundant component, following by sulfate (19.3 %), nitrate (13.6 %), ammonium (11.1 %), rBC (9.7 %), and chloride (1.3 %). These PM1 species together can reconstruct similar to 44% of the light extinction during this campaign based on the IMPROVE method. Chemically resolved mass-based size distributions revealed that small particles especially ultrafine ones (< 100 nm vacuum aerodynamic diameter) were dominated by organics and rBC, while large particles had significant contributions from secondary inorganic species. Source apportionment of organic aerosols (OA) yielded four OA subcomponents, including hydrocarbon-like OA (HOA), cooking-related OA (COA), semi-volatile oxygenated OA (SV-OOA), and low-volatility oxygenated OA (LV-OOA). Overall, secondary organic aerosol (SOA, equal to the sum of SV-OOA and LV-OOA) dominated the total OA mass (55.5 %), but primary organic aerosol (POA, equal to the sum of HOA and COA) can outweigh SOA in the early morning and evening due to enhanced human activities. High OA concentrations were often associated with high mass fractions of POA and rBC, indicating the important role of anthropogenic emissions during heavy pollution events. The diurnal cycles of nitrate, chloride, and SV-OOA both showed good anti-correlations with air temperatures, suggesting their variations were likely driven by thermodynamic equilibria and gas-to-particle partitioning. On the other hand, in contrast to other species, sulfate, and LV-OOA concentrations increased in the afternoon, and showed no positive correlations with relative humidity (RH), likely indicating the contribution from photochemical oxidation is dominant over that of aqueous-phase processing for their formations. The bivariate polar plots show that the SV-OOA was formed locally, and the variations of hydrogen-to-carbon (H/C) and oxygen-to-carbon (O/C) ratios in the Van Krevelen space further suggests an evolution pathway of SV-OOA to LV-OOA. Our findings regarding springtime aerosol chemistry in Nanjing may have important implications for the air quality remediation in the densely populated regions.
收录类别	SCI
WOS关键词	POSITIVE MATRIX FACTORIZATION ; SECONDARY ORGANIC AEROSOL ; HR-TOF-AMS ; CHEMICAL SPECIATION MONITOR ; NEW-YORK-CITY ; HIGH-RESOLUTION ; SUBMICRON AEROSOLS ; PARTICULATE MATTER ; AMBIENT AEROSOL ; HONG-KONG
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
语种	英语
出版者	COPERNICUS GESELLSCHAFT MBH
WOS记录号	WOS:000381213300020
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2557457
专题	寒区旱区环境与工程研究所
通讯作者	Ge, Xinlei; Chen, Mindong
作者单位	1.Nanjing Univ Informat Sci & Technol, Jiangsu Key Lab Atmospher Environm Monitoring & P, Collaborat Innovat Ctr Atmospher Environm & Equip, Sch Environm Sci & Engn, Nanjing 210044, Jiangsu, Peoples R China 2.Yangzhou Environm Monitoring Ctr, Yangzhou 225007, Jiangsu, Peoples R China 3.Univ Calif Davis, Dept Environm Toxicol, Davis, CA 95616 USA 4.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China 5.Chinese Acad Sci, State Key Lab Cryospher Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China 6.Nanjing Tianbo Environm Technol Co Ltd, Nanjing 210047, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Wang, Junfeng,Ge, Xinlei,Chen, Yanfang,et al. Highly time-resolved urban aerosol characteristics during springtime in Yangtze River Delta, China: insights from soot particle aerosol mass spectrometry[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2016,16(14):9109-9127.
APA	Wang, Junfeng.,Ge, Xinlei.,Chen, Yanfang.,Shen, Yafei.,Zhang, Qi.,...&Chen, Mindong.(2016).Highly time-resolved urban aerosol characteristics during springtime in Yangtze River Delta, China: insights from soot particle aerosol mass spectrometry.ATMOSPHERIC CHEMISTRY AND PHYSICS,16(14),9109-9127.
MLA	Wang, Junfeng,et al."Highly time-resolved urban aerosol characteristics during springtime in Yangtze River Delta, China: insights from soot particle aerosol mass spectrometry".ATMOSPHERIC CHEMISTRY AND PHYSICS 16.14(2016):9109-9127.

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