Satellite data published by NASA reveal low levels of pollution after India goes on 42-day nationwide lockdown to keep check on spread of novel coronavirus in country
New Delhi: The levels of aerosol particles in India has gone down to a 20-year low for the month of April, reveals satellite data published by American space agency National Aeronautics and Space Administration (NASA).
The data revealed the low levels of pollution levels after India went on a 42-day lockdown to keep a check on the spread of coronavirus in the country.
"We knew we would see changes in atmospheric composition in many places during the lockdown," said Pawan Gupta, a Universities Space Research Association (USRA) scientist at NASA's Marshall Space Flight Center. "But I have never seen aerosol values so low in the Indo-Gangetic Plain at this time of year," added Gupta.
The official handle of State for South and Central Asia tweeted, "These images from NASA were taken each spring starting in 2016 and show a 20-year low in airborne particle levels over India. When India and the world are ready to work and travel again, let's not forget that collaborative action can result in cleaner air."
The data published with maps show aerosol optical depth (AOD) in 2020 compared to the average levels for the year 2016-2019. Aerosol optical depth is a measurement of how light behaves with airborne particles as it travels through the atmosphere.