Impacts of the COVID-19 lockdown on air pollution at regional and urban background sites in northern Italy

Putaud, Jean-Philippe; Pozzoli, Luca; Pisoni, Enrico; Martins Dos Santos, Sebastiao; Lagler, Friedrich; Lanzani, Guido; Dal Santo, Umberto; Colette, Augustin

doi:https://doi.org/10.5194/acp-21-7597-2021

Articles | Volume 21, issue 10

https://doi.org/10.5194/acp-21-7597-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-21-7597-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 10

Research article

|

19 May 2021

Research article |

| 19 May 2021

Impacts of the COVID-19 lockdown on air pollution at regional and urban background sites in northern Italy

Jean-Philippe Putaud, Luca Pozzoli, Enrico Pisoni, Sebastiao Martins Dos Santos, Friedrich Lagler, Guido Lanzani, Umberto Dal Santo, and Augustin Colette

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Final revised paper (published on 19 May 2021)
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Preprint (discussion started on 12 Oct 2020)
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Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC1: 'Comments on “Impacts of the COVID-19 lockdown on air pollution at regional and urban background sites in northern Italy” by Putaud et al.', Anonymous Referee #2, 04 Nov 2020
- AC1: 'Reply to Referee #2' comments', Jean-Philippe Putaud, 25 Nov 2020
RC2: 'Comments to authors', Anonymous Referee #1, 05 Jan 2021

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Jean-Philippe Putaud on behalf of the Authors (27 Jan 2021) Author's response Author's tracked changes Manuscript

ED: Referee Nomination & Report Request started (07 Feb 2021) by Rolf Müller

RR by Anonymous Referee #2 (08 Feb 2021)

RR by Anonymous Referee #1 (17 Mar 2021)

ED: Publish as is (19 Mar 2021) by Rolf Müller

AR by Jean-Philippe Putaud on behalf of the Authors (24 Mar 2021)

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Short summary

To determine the impact of the COVID lockdown on air quality in northern Italy, measurements of atmospheric pollutants (NO₂, PM₁₀, O₃, NO, SO₂ ) were compared to the output of a model ignoring the lockdown. We found that NO₂ decreased on average by −30 % to −40 %. Unlike NO₂, PM₁₀ was not significantly affected due to the compensation of decreased emissions from traffic by increased emissions from domestic heating and/or by changes in atmospheric chemistry enhancing secondary aerosol formation.