Articles | Volume 21, issue 5
Atmos. Chem. Phys., 21, 3555–3592, 2021
https://doi.org/10.5194/acp-21-3555-2021
Atmos. Chem. Phys., 21, 3555–3592, 2021
https://doi.org/10.5194/acp-21-3555-2021

Research article 09 Mar 2021

Research article | 09 Mar 2021

Global impact of COVID-19 restrictions on the surface concentrations of nitrogen dioxide and ozone

Christoph A. Keller et al.

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AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Christoph A. Keller on behalf of the Authors (23 Dec 2020)  Author's response    Manuscript
ED: Referee Nomination & Report Request started (07 Jan 2021) by Andreas Richter
RR by Anonymous Referee #1 (07 Jan 2021)
ED: Publish subject to minor revisions (review by editor) (15 Jan 2021) by Andreas Richter
AR by Christoph A. Keller on behalf of the Authors (21 Jan 2021)  Author's response    Author's tracked changes    Manuscript
ED: Publish as is (21 Jan 2021) by Andreas Richter
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Short summary
This study combines surface observations and model simulations to quantify the impact of COVID-19 restrictions on air quality across the world. The presented methodology removes the confounding impacts of meteorology on air pollution. Our results indicate that surface concentrations of nitrogen dioxide, an important air pollutant emitted during the combustion of fossil fuels, declined by up to 60 % following the implementation of COVID-19 containment measures.
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