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DOI	10.1016/j.scitotenv.2022.153069
	High-spatial-resolution distributions of aerosol chemical characteristics in urban Lanzhou, western China, during wintertime: Insights from an on-road mobile aerosol mass spectrometry measurement experiment
	Zhang, Xinghua; Xu, Jianzhong; Zhao, Wenhui; Zhai, Lixiang; Kang, Shichang; Wang, Junfeng; Ge, Xinlei; Zhang, Qi
通讯作者	Xu, JZ (通讯作者)，Chinese Acad Sci, State Key Lab Cryospher Sci, Northwest Inst Eco Environm & Resources, Lanzhou 730000, Peoples R China.
发表日期	2022
ISSN	0048-9697
EISSN	1879-1026
卷号	819
英文摘要	The high-spatial-resolution distributions of the mass concentration and chemical composition of submicron particulate matter (PM1) across four different functional districts in Lanzhou, a typical northwestern city in China, were studied during the winter haze pollution period using an on-road real-time mobile monitoring system. The purpose of this study is to characterize the spatial variation in the sources and chemical formation of aerosols at the intra-urban scale. A higher PM1 mass concentration (63.0 mu g m(-3)) was observed in an industrially influenced district (XG) with major contributions (70.4%) from three secondary inorganic species (sulfate, nitrate, and ammonium) and two oxygenated organic aerosol (OOA) components with different oxygenation levels. Compared with the densely populated district (CG), sulfate and more-oxidized OOA were the two most distinct contributors to the elevated PM1 mass in XG during the daytime (30.9% in XG vs. 17.5% in CG), whereas nitrate and less-oxidized OOA dominated (41.4% in XG vs. 30.6% in CG) during the nighttime. A lower PM1 mass (44.3 mu g m(-3)) was observed in CG and was contributed predominantly by primary organic aerosols emitted from traffic, cooking, and heating activities. The chemical formation mechanisms of secondary PM1 species in the two different districts during the daytime and nighttime are further examined, which indicated the important photochemical formations of nitrate in CG but sulfate in XG during the day-time, whereas favorable aqueous-phase formations of nitrate and LO-OOA in both districts during the nighttime. The stronger atmospheric oxidation capability might be a key factor leading to the more significant formations of secondary species in XG than CG. These results illustrate city-scale aerosol loading and chemical processes and are useful for local policy makers to develop differentiated and efficient mitigation strategies for the improvement of air quality in Lanzhou.
关键词	NEW-YORK-CITY REAL-TIME MEASUREMENTS PARTICULATE AIR-POLLUTION SOURCE APPORTIONMENT PM2.5 CONCENTRATIONS MULTILINEAR ENGINE SUBMICRON AEROSOLS TRACE GAS EMISSIONS EVOLUTION
英文关键词	Mobile measurement; Aerosol mass spectrometer; Lanzhou; Spatial distribution; Chemical difference
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000764870900010
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254301
作者单位	[Zhang, Xinghua; Xu, Jianzhong; Zhao, Wenhui; Zhai, Lixiang; Kang, Shichang] Chinese Acad Sci, State Key Lab Cryospher Sci, Northwest Inst Eco Environm & Resources, Lanzhou 730000, Peoples R China; [Zhang, Xinghua] China Meteorol Adm, Key Lab Arid Climat Change & Reducing Disaster Ga, Key Lab Arid Climat Change & Disaster Reduct CMA, Inst Arid Meteorol, Lanzhou 730020, Peoples R China; [Zhang, Xinghua; Zhao, Wenhui; Zhai, Lixiang; Kang, Shichang] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Kang, Shichang] CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100085, Peoples R China; [Wang, Junfeng; Ge, Xinlei] Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Atmospher Environm & Equip, Sch Environm Sci & Engn, Jiangsu Key Lab OfAunospher Environm Monitoring &, Nanjing 210044, Peoples R China; [Wang, Junfeng] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA; [Zhang, Qi] Univ Calif Davis, Dept Environm Toxicol, Davis, CA 95616 USA
推荐引用方式 GB/T 7714	Zhang, Xinghua,Xu, Jianzhong,Zhao, Wenhui,et al. High-spatial-resolution distributions of aerosol chemical characteristics in urban Lanzhou, western China, during wintertime: Insights from an on-road mobile aerosol mass spectrometry measurement experiment[J]. 中国科学院西北生态环境资源研究院,2022,819.
APA	Zhang, Xinghua.,Xu, Jianzhong.,Zhao, Wenhui.,Zhai, Lixiang.,Kang, Shichang.,...&Zhang, Qi.(2022).High-spatial-resolution distributions of aerosol chemical characteristics in urban Lanzhou, western China, during wintertime: Insights from an on-road mobile aerosol mass spectrometry measurement experiment.SCIENCE OF THE TOTAL ENVIRONMENT,819.
MLA	Zhang, Xinghua,et al."High-spatial-resolution distributions of aerosol chemical characteristics in urban Lanzhou, western China, during wintertime: Insights from an on-road mobile aerosol mass spectrometry measurement experiment".SCIENCE OF THE TOTAL ENVIRONMENT 819(2022).