
Nitrogen dioxide concentrations observed over major European cities
This graph shows the averaged nitrogen dioxide concentrations over five major European cities. The upper panel shows concentrations (using a 14-day moving average) in 2019 compared to 2020 using data from the Copernicus Sentinel-5P satellite, while the lower panel shows in situ observations.
contains modified Copernicus Sentinel data (2019-20), processed by KNMI/BIRA-IASB
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