Articles | Volume 21, issue 22
https://doi.org/10.5194/acp-21-17167-2021
https://doi.org/10.5194/acp-21-17167-2021
Research article
 | 
25 Nov 2021
Research article |  | 25 Nov 2021

Response of atmospheric composition to COVID-19 lockdown measures during spring in the Paris region (France)

Jean-Eudes Petit, Jean-Charles Dupont, Olivier Favez, Valérie Gros, Yunjiang Zhang, Jean Sciare, Leila Simon, François Truong, Nicolas Bonnaire, Tanguy Amodeo, Robert Vautard, and Martial Haeffelin

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Cited articles

Aiken, A. C., DeCarlo, P. F., Kroll, J. H., Worsnop, D. R., Huffman, J. A., Docherty, K. S., Ulbrich, I. M., Mohr, C., Kimmel, J. R., and Sueper, D.: O/C and OM/OC ratios of primary, secondary, and ambient organic aerosols with high-resolution time-of-flight aerosol mass spectrometry, Environ. Sci. Technol., 42, 4478–4485, 2008. 
Anderson, R. M., Heesterbeek, H., Klinkenberg, D., and Hollingsworth, T. D.: How will country-based mitigation measures influence the course of the COVID-19 epidemic?, The Lancet, 395, 931–934, https://doi.org/10.1016/S0140-6736(20)30567-5, 2020. 
Bigi, A. and Vogt, F. P. A.: mannkendall/R: First release (v1.0.0), Zenodo, https://doi.org/10.5281/zenodo.4134633, 2020. 
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Short summary
The COVID-19 outbreak led to lockdowns at national scales in spring 2020. Large cuts in emissions occurred, but the quantitative assessment of their role from observations is hindered by weather and interannual variability. That is why we developed an innovative methodology in order to best characterize the impact of lockdown on atmospheric chemistry. We find that a local decrease in traffic-related pollutants triggered a decrease of secondary aerosols and an increase in ozone.
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