Satellite Imagery Reveals Drops in Nitrogen Dioxide Concentrations Due to COVID-19 Lockdowns


Maxwell Bernstein | May 15, 2020

The European Space Agency (ESA) released satellite imagery that shows a reduction of Nitrogen Dioxide concentrations in Europe, China and India because of lockdown measures that are intended to curb the spread of COVID-19. The Copernicus Sentinal-5P satellite shows Nitrogen Dioxide concentrations fall by 45-50% in major cities across Europe, China and India. 

Nitrogen Dioxide comes from the burning of fuel in vehicles and powerplants, creating smog and acid rain, which irritates airways in the human respiratory system according to the Environmental Protection Agency.  

A close up of a map

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Image by ESA

A drop in Nitrogen Dioxide concentrations, which are represented by red, can be observed between March-April of 2019 and the lockdown that took place in March-April of 2020. 

Airborne Nitrogen Dioxide Plummets Over China

Image by NASA

A reduction in Nitrogen Dioxide concentrations was also observed over China and Hong Kong showing a similar trend to Europe. 

Nitrogen dioxide concentrations over India

Image by ESA

Major cities in India such as Mumbai and Delhi saw Nitrogen Dioxide concentrations reduce by 40-50%.