Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 22, issue 20
Articles | Volume 22, issue 20
https://doi.org/10.5194/acp-22-13423-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-22-13423-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 20
Technical note
 | 
18 Oct 2022
Technical note |  | 18 Oct 2022

Technical note: Northern midlatitude baseline ozone – long-term changes and the COVID-19 impact

David D. Parrish, Richard G. Derwent, Ian C. Faloona, and Charles A. Mims

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Latest update: 18 Sep 2025
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Short summary
Accounting for the continuing long-term decrease of pollution ozone and the large 2020 Arctic stratospheric ozone depletion event improves estimates of background ozone changes caused by COVID-19-related emission reductions; they are smaller than reported earlier. Cooperative, international emission control efforts aimed at maximizing the ongoing decrease in hemisphere-wide background ozone may be the most effective approach to improving ozone pollution in northern midlatitude countries.
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