Articles | Volume 21, issue 10
Atmos. Chem. Phys., 21, 7597–7609, 2021
https://doi.org/10.5194/acp-21-7597-2021
Atmos. Chem. Phys., 21, 7597–7609, 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 et al.

Data sets

Joint Research Centre Data Catalogue European Commission https://data.jrc.ec.europa.eu/collection/abcis

ACTRIS Data Centre Norsk Institutt for Luftforskning (NILU) https://actris.nilu.no/

Richiesta Dati ARPA Lombardia https://www.arpalombardia.it/Pages/Aria/Richiesta-Dati.aspx

CAMS European air quality forecasts Copernicus Atmosphere Monitoring Service (CAMS) https://ads.atmosphere.copernicus.eu/cdsapp#!/dataset/cams-europe-air-quality-forecasts?tab=form

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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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