Articles | Volume 22, issue 9
https://doi.org/10.5194/acp-22-6151-2022
https://doi.org/10.5194/acp-22-6151-2022
Research article
 | 
11 May 2022
Research article |  | 11 May 2022

Tropospheric ozone production and chemical regime analysis during the COVID-19 lockdown over Europe

Clara M. Nussbaumer, Andrea Pozzer, Ivan Tadic, Lenard Röder, Florian Obersteiner, Hartwig Harder, Jos Lelieveld, and Horst Fischer

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Latest update: 15 Jul 2024
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Short summary
The European COVID-19 lockdowns have significantly reduced the emission of primary pollutants such as NOx, which impacts the tropospheric photochemical processes and the abundance of O3. In this study, we present how the lockdowns have affected tropospheric trace gases and ozone production based on in situ observations and modeling simulations. We additionally show that the chemical regime shifted from a transition point to a NOx limitation in the upper troposphere.
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