Articles | Volume 21, issue 6
Atmos. Chem. Phys., 21, 5235–5251, 2021
https://doi.org/10.5194/acp-21-5235-2021
Atmos. Chem. Phys., 21, 5235–5251, 2021
https://doi.org/10.5194/acp-21-5235-2021
Research article
01 Apr 2021
Research article | 01 Apr 2021

COVID-19 lockdown-induced changes in NO2 levels across India observed by multi-satellite and surface observations

Akash Biswal et al.

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Revised manuscript accepted for ESSD
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Cited articles

Alonso-Blanco, E., Castro, A., Calvo, A. I., Pont, V., Mallet, M., and Fraile, R.: Wildfire smoke plumes transport under a subsidence inversion: Climate and health implications in a distant urban area, Sci. Total Environ., 619, 988–1002 2018. 
Archer, C. L., Cervone, G., Golbazi, M., Al Fahel, N., and Hultquist, C.: Changes in air quality and human mobility in the USA during the COVID-19 pandemic, Bull. Atmospheric Sci. Technol., 1, 491–514, https://doi.org/10.1007/s42865-020-00019-0, 2020. 
Bauwens, M., Compernolle, S., Stavrakou, T., Müller, J.-F., Gent, J. van, Eskes, H., Levelt, P. F., A, R. van der, Veefkind, J. P., Vlietinck, J., Yu, H., and Zehner, C.: Impact of Coronavirus Outbreak on NO2 Pollution Assessed Using TROPOMI and OMI Observations, Geophys. Res. Lett., 47, e2020GL087978, https://doi.org/10.1029/2020GL087978, 2020. 
Bhuvan: Indian Geo-Platform of Indian Space Research Organisation, Thematic Services, available at: https://bhuvan.nrsc.gov.in, last access: 3 January 2020. 
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Satellite and surface observations show a reduction in NO2 levels over India during the lockdown compared to business-as-usual years. A substantial reduction, proportional to the population, was observed over the urban areas. The changes in NO2 levels at the surface during the lockdown appear to be present in the satellite observations. However, TROPOMI showed a better correlation with surface NO2 and was more sensitive to the changes than OMI because of the finer resolution.
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