Articles | Volume 22, issue 21
https://doi.org/10.5194/acp-22-14243-2022
https://doi.org/10.5194/acp-22-14243-2022
Research article
 | 
08 Nov 2022
Research article |  | 08 Nov 2022

COVID-19 lockdown emission reductions have the potential to explain over half of the coincident increase in global atmospheric methane

David S. Stevenson, Richard G. Derwent, Oliver Wild, and William J. Collins

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Latest update: 28 May 2024
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Short summary
Atmospheric methane’s growth rate rose by 50 % in 2020 relative to 2019. Lower nitrogen oxide (NOx) emissions tend to increase methane’s atmospheric residence time; lower carbon monoxide (CO) and non-methane volatile organic compound (NMVOC) emissions decrease its lifetime. Combining model sensitivities with emission changes, we find that COVID-19 lockdown emission reductions can explain over half the observed increases in methane in 2020.
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