Seasonal characteristics, formation mechanisms and source origins of PM2.5 in two megacities in Sichuan Basin, China

doi:10.5194/acp-18-865-2018

CORC > 重庆绿色智能技术研究院 > 中国科学院重庆绿色智能技术研究院 > 大气环境研究中心

	Seasonal characteristics, formation mechanisms and source origins of PM2.5 in two megacities in Sichuan Basin, China
	Wang, Huanbo 1,2; Tian, Mi 1; Chen, Yang1 ; Shi, Guangming 1; Liu, Yuan 1; Yang, Fumo1,2,3,4 ; Zhang, Leiming 5; Deng, Liqun 6; Yu, Jiayan 7; Peng, Chao 1
刊名	ATMOSPHERIC CHEMISTRY AND PHYSICS
	2018-01-24
卷号	18 期号:2 页码:865-881
ISSN号	1680-7316
DOI	10.5194/acp-18-865-2018
英文摘要	To investigate the characteristics of PM2.5 and its major chemical components, formation mechanisms, and geographical origins in the two megacities, Chengdu (CD) and Chongqing (CQ), in Sichuan Basin of southwest China, daily PM2.5 samples were collected simultaneously at one urban site in each city for four consecutive seasons from autumn 2014 to summer 2015. Annual mean concentrations of PM2.5 were 67.0 +/- 43.4 and 70.9 +/- 41.4 mu g m(-3) at CD and CQ, respectively. Secondary inorganic aerosol (SNA) and organic matter (OM) accounted for 41.1 and 26.1 % of PM2.5 mass at CD, and 37.4 and 29.6 % at CQ, respectively. Seasonal variations of PM2.5 and major chemical components were significant, usually with the highest mass concentration in winter and the lowest in summer. Daily PM2.5 concentration exceeded the national air quality standard on 30 % of the sampling days at both sites, and most of the pollution events were at the regional scale within the basin formed under stagnant meteorological conditions. The concentrations of carbonaceous components were higher at CQ than CD, likely partially caused by emissions from the large number of motorcycles and the spraying processes used during automobile production in CQ. Heterogeneous reactions probably played an important role in the formation of SO42-, while both homogeneous and heterogeneous reactions contributed to the formation of NO3-. Geographical origins of emissions sources contributing to high PM2.5 masses at both sites were identified to be mainly distributed within the basin based on potential source contribution function (PSCF) analysis.
资助项目	"Strategic Priority Research Program" of the Chinese Academy of Sciences[KJZD-EW-TZ-G06] ; National Natural Science Foundation of China[41405027] ; National Natural Science Foundation of China[41375123] ; National Natural Science Foundation of China[41403089] ; West Action Plan of the Chinese Academy of Science[KZCX2-XB3-14] ; Chongqing Science and Technology Commission[cstc2014yykfC20003] ; Chongqing Science and Technology Commission[cstckjcxljrc13]
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	COPERNICUS GESELLSCHAFT MBH
WOS记录号	WOS:000423343300001
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/6242]
专题	大气环境研究中心
通讯作者	Yang, Fumo
作者单位	1.Chinese Acad Sci, Res Ctr Atmospher Environm, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 2.Chongqing Univ, Sch Urban Construct & Environm Engn, Chongqing 400044, Peoples R China 3.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China 4.Yangtze Normal Univ, Coordinated Ctr Excellence Green Dev Wuling Reg, Chongqing 408100, Peoples R China 5.Environm & Climate Change Canada, Sci & Technol Branch, Air Qual Res Div, Toronto, ON, Canada 6.Sichuan Acad Environm Sci, Chengdu 610041, Sichuan, Peoples R China 7.Chongqing Environm Monitoring Ctr, Chongqing 401147, Peoples R China
推荐引用方式 GB/T 7714	Wang, Huanbo,Tian, Mi,Chen, Yang,et al. Seasonal characteristics, formation mechanisms and source origins of PM2.5 in two megacities in Sichuan Basin, China[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(2):865-881.
APA	Wang, Huanbo.,Tian, Mi.,Chen, Yang.,Shi, Guangming.,Liu, Yuan.,...&Cao, Xuyao.(2018).Seasonal characteristics, formation mechanisms and source origins of PM2.5 in two megacities in Sichuan Basin, China.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(2),865-881.
MLA	Wang, Huanbo,et al."Seasonal characteristics, formation mechanisms and source origins of PM2.5 in two megacities in Sichuan Basin, China".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.2(2018):865-881.