Four-Month Changes in Air Quality during and after the COVID-19 Lockdown in Six Megacities in China
Yunjie Wang, Yifan Wen, Yue Wang, Shaojun Zhang, K. Max Zhang, Haotian Zheng, Jia Xing, Ye Wu, Jiming Hao
Abstract
concentrations, although heavy pollution episodes occurred on certain days due to the enhanced formation of secondary aerosols in association with the increased atmospheric oxidizing capacity. We also observed that the changes in air pollution levels decreased as the lockdown was gradually eased in various cities.
Topics & Concepts
MegacityBeijingCoronavirus disease 2019 (COVID-19)Air quality indexChinaAir pollutionEnvironmental health2019-20 coronavirus outbreakSevere acute respiratory syndrome coronavirus 2 (SARS-CoV-2)Environmental sciencePollutionPandemicGeographyMeteorologyMedicineDiseaseOutbreakChemistryVirologyBiologyArchaeologyInfectious disease (medical specialty)Organic chemistryPathologyEcologyAir Quality and Health ImpactsCOVID-19 impact on air qualityAir Quality Monitoring and Forecasting