Impact of the COVID-19 pandemic and control measures on air quality and aerosol light absorption in Southwestern China

doi:10.1016/j.scitotenv.2020.141419

IEECAS OpenIR > 粉尘与环境研究室

	Impact of the COVID-19 pandemic and control measures on air quality and aerosol light absorption in Southwestern China
	Chen, Yang 1; Zhang, Shumin 2; Peng, Chao 1; Shi, Guangming 3; Tian, Mi 4; Huang, Ru-Jin 5,6; Guo, Dongmei 2; Wang, Huanbo 7; Yao, Xiaojiang 1; Yang, Fumo 3
通讯作者	Chen, Yang(chenyang@cigit.ac.cn) ; Tian, Mi(tianmi628@cqu.edu.cn)
	2020-12-20
发表期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
卷号	749 页码:7
摘要	China has been performing nationwide social lockdown by releasing the Level 1 response to major public health emergencies (RMPHE) to struggle against the COVID-19 (SARS-CoV-2) outbreak since late January 2020. During the Level 1 RMPHE, social production and public transport were maintained at minimal levels, and residents stayed in and worked from home. The universal impact of anthropogenic activities on air pollution can be evaluated by comparing it with air quality under such extreme conditions. We investigated the concentration of both gaseous and particulate pollutants and aerosol light absorption at different levels of (RMPHE) in an urban area of southwestern China During the lockdown, PM2.5, PM10, SO2, NOx, and BC decreased by 30-50%, compared to the pre-Level 1 RMPHE period. Meanwhile, the decrease of NOx caused the rise of O-3 by up to 2.3 times clue to the volatile organic compounds (VOCs) limitation. The aerosol light absorption coefficient at multiple wavelengths decreased by 50%, and AAE decreased by 20% during the Level 1 RMPHE. BrC played essential roles in light absorption after the RMPHE was announced, accounting for 54.0% of the aerosol absorption coefficient at 370 nm. Moreover, the lockdown down-weighted the fraction of fossil fuel in BC concentrations to 0.43 (minima). This study characterizes air pollution at the most basic level and can provide policymakers with references for the "baseline." (C) 2020 Elsevier B.V. All rights reserved.
关键词	COVID-19 Lockdown Air quality Southern China Black carbon
DOI	10.1016/j.scitotenv.2020.141419
关键词[WOS]	BROWN CARBON ; BLACK CARBON ; OPTICAL-PROPERTIES ; PARTICLES ; SITE ; COEFFICIENT ; MATTER ; SMOKE ; URBAN
收录类别	SCI ; SCI
语种	英语
资助项目	theNational Key Research andDevelopment Program of China[2018YFC0200403] ; theNational Key Research andDevelopment Program of China[2018YFC0214001] ; National Natural Science Foundation of China[41703136] ; Chongqing Science and Technology Commission[cstc2018jszx-zdyfxmX0015]
WOS研究方向	Environmental Sciences & Ecology
项目资助者	theNational Key Research andDevelopment Program of China ; National Natural Science Foundation of China ; Chongqing Science and Technology Commission
WOS类目	Environmental Sciences
WOS记录号	WOS:000581793800026
出版者	ELSEVIER
引用统计	被引频次：37[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/15557
专题	粉尘与环境研究室
通讯作者	Chen, Yang; Tian, Mi
作者单位	1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Ctr Atmospher Environm Res, Chongqing 400714, Peoples R China 2.North Sichuan Med Coll, Sch Basic Med Sci, Nanchong 637000, Sichuan, Peoples R China 3.Sichuan Univ, Coll Architecture & Environm, Chengdu 610065, Peoples R China 4.Chongqing Univ, Sch Urban Construct & Environm Engn, Chongqing 400044, Peoples R China 5.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China 6.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710075, Peoples R China 7.Southwest Univ Sci & Technol, Sch Environm & Resource, Mianyang 621010, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Chen, Yang,Zhang, Shumin,Peng, Chao,et al. Impact of the COVID-19 pandemic and control measures on air quality and aerosol light absorption in Southwestern China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,749:7.
APA	Chen, Yang.,Zhang, Shumin.,Peng, Chao.,Shi, Guangming.,Tian, Mi.,...&Yang, Fumo.(2020).Impact of the COVID-19 pandemic and control measures on air quality and aerosol light absorption in Southwestern China.SCIENCE OF THE TOTAL ENVIRONMENT,749,7.
MLA	Chen, Yang,et al."Impact of the COVID-19 pandemic and control measures on air quality and aerosol light absorption in Southwestern China".SCIENCE OF THE TOTAL ENVIRONMENT 749(2020):7.