This app shows the average concentration of airborne Nitrogen Dioxide (NO2) over the last 30 days in comparison with the same period in 2019. The NO2 is a gas that is emitted from combustion sources, therefore changes in NO2 could reflect the economic slowdown following the outbreak of coronavirus. The NO2 concentrations were retrieved by the European Copernicus Sentinel-5P satellite. Pixels with cloud fraction higher than 25% are removed from the analysis. The app is automatically updated when new observations are available.

Click here to view in full screen.

This is an example over China:

 

NEW: you can also plot the time series of the average NO2 concentration in a user-defined region in this app:  https://sgascoin.users.earthengine.app/view/no2-time-series

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