Articles | Volume 21, issue 24
https://doi.org/10.5194/acp-21-18303-2021
https://doi.org/10.5194/acp-21-18303-2021
Research article
 | 
17 Dec 2021
Research article |  | 17 Dec 2021

Impact of the COVID-19 pandemic related to lockdown measures on tropospheric NO2 columns over Île-de-France

Andrea Pazmiño, Matthias Beekmann, Florence Goutail, Dmitry Ionov, Ariane Bazureau, Manuel Nunes-Pinharanda, Alain Hauchecorne, and Sophie Godin-Beekmann

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Cited articles

Airparif: Open data, available at: https://data-airparif-asso.opendata.arcgis.com/, last access: 22 January 2021. 
Airparif: Surveillance et information sur la qualité de l'air en Île-de-France – Bilan de l'année 2019, available at: https://www.airparif.asso.fr/sites/default/files/documents/2020-06/bilan-2019_0.pdf, (last access: August 2021), 2020. 
Ancellet, G., Ravetta, F., Pelon, J., Pazmino, A., Klein, A., Dieudonné, E., Augustin, P., and Delbarre, H.: Ozone Lidar Observations in the City of Paris: Seasonal Variability and Role of The Nocturnal Low Level Jet, EPJ Web Conf., 237, 03022, https://doi.org/10.1051/epjconf/202023703022, 2020. 
Baldasano, J.: COVID-19 lockdown effects on air quality by NO2 in the cities of Barcelona and Madrid (Spain), Sci. Total Environ., 741, 140353, https://doi.org/10.1016/j.scitotenv.2020.140353, 2020. 
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UV-Visible Système d'Analyse par Observations Zénithales (SAOZ) NO2 tropospheric columns were evaluated to quantify the impact of the lockdown in limiting the COVID-19 propagation. Meteorological conditions and NO2 trends were considered. The negative anomaly in tropospheric columns in 2020, attributed to the lockdown (17 March–10 May and related emissions reductions), was 56 % at Paris and 46 % at a suburban site. A similar anomaly was found in the Airparif data of surface concentrations.
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