Articles | Volume 21, issue 10
https://doi.org/10.5194/acp-21-7597-2021
https://doi.org/10.5194/acp-21-7597-2021
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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Latest update: 21 Feb 2024
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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.
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