Impacts of COVID-19 control measures on tropospheric NO$_2$ over China,
South Korea and Italy
Impacts of COVID-19 control measures on tropospheric NO$_2$ over China,
South Korea and Italy
Tropospheric nitrogen dioxide (NO$_2$) concentrations are strongly affected by anthropogenic activities. Using space-based measurements of tropospheric NO$_2$, here we investigate the responses of tropospheric NO$_2$ to the 2019 novel coronavirus (COVID-19) over China, South Korea, and Italy. We find noticeable reductions of tropospheric NO$_2$ columns due to the COVID-19 controls …