COVID-19 lockdown-induced changes in NO<sub>2</sub> levels across India observed by multi-satellite and surface observations

Biswal, Akash; Singh, Vikas; Singh, Shweta; Kesarkar, Amit P.; Ravindra, Khaiwal; Sokhi, Ranjeet S.; Chipperfield, Martyn P.; Dhomse, Sandip S.; Pope, Richard J.; Singh, Tanbir; Mor, Suman

doi:https://doi.org/10.5194/acp-21-5235-2021

Articles | Volume 21, issue 6

https://doi.org/10.5194/acp-21-5235-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-21-5235-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 6

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, Vikas Singh, Shweta Singh, Amit P. Kesarkar, Khaiwal Ravindra, Ranjeet S. Sokhi, Martyn P. Chipperfield, Sandip S. Dhomse, Richard J. Pope, Tanbir Singh, and Suman Mor

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Final revised paper (published on 01 Apr 2021)
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Preprint (discussion started on 13 Oct 2020)
Supplement to the preprint

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC1: 'comment for Biswal et al', Anonymous Referee #1, 10 Dec 2020
- AC1: 'Reply on RC1', V. Singh, 09 Feb 2021
RC2: 'Review report, Biswal et al', Anonymous Referee #2, 15 Dec 2020
- AC2: 'Reply on RC2', V. Singh, 09 Feb 2021

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by V. Singh on behalf of the Authors (09 Feb 2021) Author's response Author's tracked changes Manuscript

ED: Referee Nomination & Report Request started (10 Feb 2021) by Andreas Hofzumahaus

RR by Anonymous Referee #1 (10 Feb 2021)

RR by Anonymous Referee #2 (24 Feb 2021)

ED: Publish as is (02 Mar 2021) by Andreas Hofzumahaus

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Short summary

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.

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

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Interactive discussion

Peer-review completion

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