Significant concurrent decrease in PM_(2.5) and NO_(2) concentrations in China during COVID-19 epidemic

作     者：Biiuu Chu Shuping Zhang Jun Liu Qingxin Ma Hong He Biwu Chu;Shuping Zhang;Jun Liu;Qingxin Ma;Hong He

作者机构：State Key Joint Laboratory of Environment Simulation and Pollution ControlResearch Center for Eco-Enuironmental SciencesChinese Academy of SciencesBeijing 100085China Center for Excellence in Regional Atmospheric EnvironmentInstitute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China University of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2021年第33卷第1期

页      面：346-353页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 070602[理学-大气物理学与大气环境] 0706[理学-大气科学] 

基　　金：the National Natural Science Foundation of China(No.41877304) the National Key R&D Program of China(No.2018YFC0506901) the Youth Innovation Promotion Association,CAS(Nos.2018060 and 2018055)。 

主　　题：Covid-19 epidemic Air quality Temporal variation and spatial distribution Coordinated control PM_(2.5) O3 

摘      要：The strict control measures and social lockdowns initiated to combat COVID-19 epidemic have had a notable impact on air pollutant concentrations.According to observation data obtained from the China National Environmental Monitoring Center,compared to levels in 2019,the average concentration of NO_(2) in early 2020 during COVID-19 epidemic has decreased by 53%,50%,and 30%in Wuhan city,Hubei Province(Wuhan excluded),and China(Hubei excluded),respectively.Simultaneously,PM_(2.5) concentration has decreased by 35%,29%,and 19%in Wuhan,Hubei(Wuhan excluded),and China(Hubei excluded),respectively.Less significant declines have also been found for SO_(2) and CO concentrations.We also analyzed the temporal variation and spatial distribution of air pollutant concentrations in China during COVID-19 epidemic.The decreases in PM_(2.5) and NO_(2) concentrations showed relatively consistent temporal variation and spatial distribution.These results support control of NO x to further reduce PM_(2.5) pollution in China.The concurrent decrease in NOx and PM_(2.5) concentrations resulted in an increase of O3 concentrations across China during COVID-19 epidemic,indicating that coordinated control of other pollutants is needed.