NASA

Maps from NASA show how the aerosol optical depth (AOD) measurements over India from 2016 to 2020 between March 31 to April 5. The last map in the series, dubbed ‘anomaly’, shows how the AOD in 2020 compares to the average between 2016 to 2019.

The data was retrieved by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite.