气候变化领域集成服务门户(CCPortal): Contributions of traffic emissions and new particle formation to the ultrafine particle size distribution in the megacity of Beijing

CCPortal

DOI	10.1016/j.atmosenv.2021.118652
	Contributions of traffic emissions and new particle formation to the ultrafine particle size distribution in the megacity of Beijing
	Wu H.; Li Z.; Jiang M.; Liang C.; Zhang D.; Wu T.; Wang Y.; Cribb M.
发表日期	2021
ISSN	1352-2310
卷号	262
英文摘要	The important role of traffic emissions in air pollution has been widely recognized. However, the corresponding contributions to the ultrafine particle distribution and new particle formation (NPF) are poorly understood due to the mixed influences of various sources. Measurements of particle evolution and NPF were made at a heavy traffic site near the 5th Ring Road of Beijing from August 2017 to October 2019. A positive matrix factorization receptor model (version 5.0) consisting of the log-normal fit method and the k-means clustering method was used to identify and quantify the major sources of particle number concentrations. Based on the characteristics of NPF, additional analyses were performed to identify formation sources, including back-trajectory clustering and correlations between auxiliary variables and the relative contributions of all resolved factors. Traffic emissions mainly influenced Aitken mode (25–100 nm) particles (>60%), and NPF significantly contributed to the ultrafine particle distribution (47.2%). Additionally, regional transport notably affected the occurrence of NPF at the observation site, with northwest airmass transport influencing the nucleation mode the most and southeast airmass transport influencing the Aitken mode the most. © 2021
关键词	New particle formation Source characteristics Traffic emissions
语种	英语
scopus关键词	K-means clustering; Particle size; Particle size analysis; Air mass; Measurement of particles; Megacities; New particle formation; Particles distribution; Particles-size distributions; Source characteristics; Traffic emissions; Ultrafine particle; Ultrafine particle sizes; Factorization; atmospheric pollution; concentration (composition); detection method; megacity; particle size; pollutant source; size distribution; spatiotemporal analysis; traffic emission; article; China; concentration (parameter); k means clustering; quantitative analysis; ultrafine particulate matter; Beijing [China]; China
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/248266
作者单位	Key Laboratory of China Meteorological Administration Atmospheric Sounding, School of Electrical Engineering, Chengdu University of Information Technology, Chengdu, 610225, China; Department of Atmospheric and Oceanic Science, University of Maryland, College Park, MD 20742, United States; Sichuan Provincial Key Laboratory of Plateau Atmosphere and Environment, School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu, 610225, China; Collaborative Innovation Center for West Ecological Safety, Lanzhou University, Lanzhou, 730000, China; College of Global Change and Earth System Science, Beijing Normal University, Beijing, 100875, China; Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science & Technology, Nanjing, 210044, China
推荐引用方式 GB/T 7714	Wu H.,Li Z.,Jiang M.,et al. Contributions of traffic emissions and new particle formation to the ultrafine particle size distribution in the megacity of Beijing[J],2021,262.
APA	Wu H..,Li Z..,Jiang M..,Liang C..,Zhang D..,...&Cribb M..(2021).Contributions of traffic emissions and new particle formation to the ultrafine particle size distribution in the megacity of Beijing.ATMOSPHERIC ENVIRONMENT,262.
MLA	Wu H.,et al."Contributions of traffic emissions and new particle formation to the ultrafine particle size distribution in the megacity of Beijing".ATMOSPHERIC ENVIRONMENT 262(2021).