Articles | Volume 21, issue 17
Atmos. Chem. Phys., 21, 13311–13332, 2021
https://doi.org/10.5194/acp-21-13311-2021
Atmos. Chem. Phys., 21, 13311–13332, 2021
https://doi.org/10.5194/acp-21-13311-2021

Research article 08 Sep 2021

Research article | 08 Sep 2021

A satellite-data-driven framework to rapidly quantify air-basin-scale NOx emissions and its application to the Po Valley during the COVID-19 pandemic

Kang Sun et al.

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Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2021-268', Anonymous Referee #2, 19 Jun 2021
  • RC2: 'Comment on acp-2021-268', Anonymous Referee #1, 22 Jun 2021

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Kang Sun on behalf of the Authors (22 Jul 2021)  Author's response    Author's tracked changes    Manuscript
ED: Publish as is (10 Aug 2021) by Michel Van Roozendael
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Short summary
We bridge the gap between satellite column observations and emissions by accounting for the dynamic lifetime of pollutants due to wind dispersion and the chemical lifetime due to chemical reactions. Applying it to the Po Valley air basin, we derive the monthly emissions of nitrogen oxides using satellite nitrogen dioxide observations. We further quantify the COVID-19-driven decline of emissions and estimate a 22 % decrease in nitrogen oxide emissions due to the pandemic in 2020.
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