Characterization of particle number size distribution and new particle formation in Southern China

CORC > 北京大学 > 环境科学与工程学院

	Characterization of particle number size distribution and new particle formation in Southern China
	Huang Xiaofeng ; Wang Chuan ; Peng Jianfei ; He Lingyan ; Cao Liming ; Zhu Qiao ; Cui Jie ; Wu Zhijun ; Hu Min
刊名	Journal of Environmental Sciences
	2017
关键词	Scanning mobility particle sizer (SMPS) Particle number size distribution (PND) New particle formation (NPF) Air pollution Southern China
英文摘要	Knowledge of particle number size distribution (PND) and new particle formation (NPF) events in Southern China is essential for mitigation strategies related to submicron particles and their effects on regional air quality, haze, and human health. In this study, seven field measurement campaigns were conducted from December 2013 to May 2015 using a scanning mobility particle sizer (SMPS) at four sites in Southern China, including three urban sites and one background site. Particles were measured in the size range of 15-615 nm, and the median particle number concentrations (PNCs) were found to vary in the range of 0.3 × 10~4-2.2 × 10~4 cm~(-3) at the urban sites and were approximately 0.2 × 10~4 cm~(-3) at the background site. The peak diameters at the different sites varied largely from 22 to 102 nm. The PNCs in the Aitken mode (25-100 nm) at the urban sites were up to 10 times higher than they were at the background site, indicating large primary emissions from traffic at the urban sites. The diurnal variations of PNCs were significantly influenced by both rush hour traffic at the urban sites and NPF events. The frequencies of NPF events at the different sites were 0%-30%, with the highest frequency occurring at an urban site during autumn. With higher SO_2 concentrations and higher ambient temperatures being necessary, NPF at the urban site was found to be more influenced by atmospheric oxidizing capability, while NPF at the background site was limited by the condensation sink. This study provides a unique dataset of particle number and size information in various environments in Southern China, which can help understand the sources, formation, and the climate forcing of aerosols in this quickly developing region, as well as help constrain and validate NPF modeling.; supported by the National Natural Science Foundation of China,the Shenzhen Science & Technology Plan, and the Ministry of Science and Technology of China; 中国科学引文数据库(CSCD); 51, 342-350
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/477656]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Huang Xiaofeng,Wang Chuan,Peng Jianfei,et al. Characterization of particle number size distribution and new particle formation in Southern China[J]. Journal of Environmental Sciences,2017.
APA	Huang Xiaofeng.,Wang Chuan.,Peng Jianfei.,He Lingyan.,Cao Liming.,...&Hu Min.(2017).Characterization of particle number size distribution and new particle formation in Southern China.Journal of Environmental Sciences.
MLA	Huang Xiaofeng,et al."Characterization of particle number size distribution and new particle formation in Southern China".Journal of Environmental Sciences (2017).