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, Yang1; Zhang, Shumin2; Peng, Chao1; Shi, Guangming3; Tian, Mi4; Huang, Ru-Jin5,6; Guo, Dongmei2; Wang, Huanbo7; Yao, Xiaojiang1; Yang, Fumo3
Corresponding AuthorChen, Yang(chenyang@cigit.ac.cn) ; Tian, Mi(tianmi628@cqu.edu.cn)
2020-12-20
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume749Pages:7
AbstractChina 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.
KeywordCOVID-19 Lockdown Air quality Southern China Black carbon
DOI10.1016/j.scitotenv.2020.141419
WOS KeywordBROWN CARBON ; BLACK CARBON ; OPTICAL-PROPERTIES ; PARTICLES ; SITE ; COEFFICIENT ; MATTER ; SMOKE ; URBAN
Indexed BySCI ; SCI
Language英语
Funding ProjecttheNational 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 Research AreaEnvironmental Sciences & Ecology
Funding OrganizationtheNational Key Research andDevelopment Program of China ; National Natural Science Foundation of China ; Chongqing Science and Technology Commission
WOS SubjectEnvironmental Sciences
WOS IDWOS:000581793800026
PublisherELSEVIER
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/15557
Collection粉尘与环境研究室
Corresponding AuthorChen, Yang; Tian, Mi
Affiliation1.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
Recommended Citation
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.
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