Impacts of short-term mitigation measures on PM2.5 and radiative effects: a case study at a regional background site near Beijing, China

doi:10.5194/acp-19-1881-2019

	Impacts of short-term mitigation measures on PM2.5 and radiative effects: a case study at a regional background site near Beijing, China
	Wang, Qiyuan 1,2; Liu, Suixin 1; Li, Nan 3; Dai, Wenting 1; Wu, Yunfei 4; Tian, Jie 5; Zhou, Yaqing 1; Wang, Meng 1; Sai, Steven 1; Ho, Hang
刊名	ATMOSPHERIC CHEMISTRY AND PHYSICS
	2019-02-12
卷号	19 期号:3 页码:1881-1899
ISSN号	1680-7316
DOI	10.5194/acp-19-1881-2019
通讯作者	Wang, Qiyuan(wangqy@ieecas.cn)
英文摘要	Measurements at a background site near Beijing showed that pollution controls implemented during the 19th National Congress of the Communist Party of China (NC-CPC) were effective in reducing PM2.5. Mass concentrations of PM2.5 and its major chemical components were 20.6%-43.1% lower during the NCCPC-control period compared with a non-control period, and differences were greater on days with stable meteorological conditions. A receptor model showed that PM2.5 from traffic-related emissions, biomass burning, industrial processes, and mineral dust was 38.5%-77.8% lower during the NCCPC-control versus non-control period, but differences in PM2.5 from coal burning were small, and secondary sources were higher during the NCCPC-control period. During one pollution episode in the non-control period, secondary sources dominated, and the WRF-Chem model showed that the Beijing-Tianjin-Hebei (BTH) region contributed 73.6% of PM2.5 mass. A second pollution episode was linked to biomass burning, and BTH contributed 46.9% of PM2.5 mass. Calculations based on Interagency Monitoring of Protected Visual Environments (IMPROVE) algorithms showed that organic matter was the largest contributor to light extinction during the non-control period whereas NH4NO3 was the main contributor during the NCCPC. The Tropospheric Ultraviolet and Visible radiation model showed that the average direct radiative forcing (DRF) values at the Earth's surface were -14.0 and -19.3 W m(-2) during the NCCPC-control and non-control periods, respectively, and the DRF for the individual PM2.5 components were 22.7%-46.7% lower during the NCCPC. The information and dataset from this study will be useful for developing air pollution control strategies in the BTH region and for understanding associated aerosol radiative effects.
资助项目	National Research Program for Key Issues in Air Pollution Control[DQGG0105] ; National Natural Science Foundation of China[41503118] ; National Natural Science Foundation of China[41661144020]
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	COPERNICUS GESELLSCHAFT MBH
WOS记录号	WOS:000458362200004
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/7385]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Wang, Qiyuan
作者单位	1.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710061, Shaanxi, Peoples R China 2.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Shaanxi, Peoples R China 3.Nanjing Univ Informat Sci & Technol, Sch Environm Sci & Engn, Nanjing 210044, Jiangsu, Peoples R China 4.Chinese Acad Sci, Inst Atmospher Phys, Key Lab Reg Climate Environm Res Temperate East A, Beijing 100029, Peoples R China 5.Xi An Jiao Tong Univ, Sch Energy & Power Engn, Dept Environm Sci & Engn, Xian 710049, Shaanxi, Peoples R China 6.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 7.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710049, Shaanxi, Peoples R China 8.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Wang, Qiyuan,Liu, Suixin,Li, Nan,et al. Impacts of short-term mitigation measures on PM2.5 and radiative effects: a case study at a regional background site near Beijing, China[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2019,19(3):1881-1899.
APA	Wang, Qiyuan.,Liu, Suixin.,Li, Nan.,Dai, Wenting.,Wu, Yunfei.,...&Cao, Junji.(2019).Impacts of short-term mitigation measures on PM2.5 and radiative effects: a case study at a regional background site near Beijing, China.ATMOSPHERIC CHEMISTRY AND PHYSICS,19(3),1881-1899.
MLA	Wang, Qiyuan,et al."Impacts of short-term mitigation measures on PM2.5 and radiative effects: a case study at a regional background site near Beijing, China".ATMOSPHERIC CHEMISTRY AND PHYSICS 19.3(2019):1881-1899.