大气和海洋科学快报（英文版）2021，Vol.14Issue(4)：45-51,7.
COVID-19疫情期间全球空气质量变化:臭氧响应的区域间差异
Global air quality change during the COVID-19 pandemic:Regionally different ozone pollution responses
摘要
Abstract
The explosive spread of the 2019 novel coronavirus(COVID-19)provides a unique chance to rethink the rela-tionship between human activity and air pollution.Though related studies have revealed substantial reductions in primary emissions,obvious differences do exist in the responses of secondary pollutants,like ozone(O3)pol-lution.However,the regional disparities of O3 responses and their causes have still not been fully investigated.To better elucidate the interrelationship between anthropogenic emissions,chemical production,and meteoro-logical conditions,O3 responses caused by lockdowns over different regions were comprehensively explored at a global scale.Observational signals of air-quality change were derived from multi-year surface measurements and satellite retrievals.With similar substantial drops in nitrogen dioxide(NO2),ozone shows rising signals in most areas of both East Asia and Europe,even up to～14 ppb,while a non-negligible declining signal exists in North America,by about 2-4 ppb.Furthermore,the drivers behind the different O3 responses are discussed based on meteorological analysis and O3 sensitivity diagnosis.On the one hand,O3 responses to NO2 declines can be affected by the primary dependence on its precursors.On the other hand,it is also highly dependent on meteorological factors,especially temperature.Our study further highlights the great importance of taking into consideration both the regional disparities and synergistic effects of precursor reductions and meteorological influence for scientific mitigation of O3 pollution.关键词
空气质量/COVID-19/臭氧/二氧化氮/气象条件Key words
Air quality/COVID-19 lockdown/Ozone/Nitrogen dioxide/Meteorology引用本文复制引用
Rong Tang,Xin Huang,Derong Zhou,Haikun Wang,Jiawei Xu,Aijun Ding..COVID-19疫情期间全球空气质量变化:臭氧响应的区域间差异[J].大气和海洋科学快报（英文版）,2021,14(4):45-51,7.基金项目
This research was supported by the National Natural Science Foun-dation of China[grant numbers 91744311 and 41922038]and the In-ternational Cooperation project of Jiangsu Provincial Science and Tech-nology Agency[grant number BZ2017066]. （）
