CAM-chem simulation of the 2020 lockdown

Gaubert 2020 Figure 1.

With the unprecedented global reduction in economic activities following the COVID-19 pandemic outbreak in early 2020, most emissions of air pollutants (i.e., nitrogen oxides (NOx), carbon monoxide (CO), sulfur dioxide (SO2), volatile organic carbon (VOC), black carbon (BC), organic carbon (OC)) have decreased substantially throughout the first half of the year. This unintended global experiment has given insight on some of the processes that control air quality and offered a glimpse into a potential future in which air quality would be improved.

COVID-19 impact on Asian emissions: Insight from space observations

MOPITT total tropospheric CO column values
During February and March 2020, ACOM scientists looked into the perturbation to atmospheric composition due to the large scale curtailing of human activities in response to COVID-19, in addition to operational issues of the ACCLIP field campaign planned for summer 2020 out of Okinawa. In this short briefing, we report on the large signature in atmospheric composition from spaceborne observations for the time period of lockdown in China during February to early March, 2020.
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ACOM | Atmospheric Chemistry Observations & Modeling