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The graph below shows up-to-date time series of the difference between TROPOMI and NDACC MAX-DOAS tropospheric NO2 column. Vertical markers (black solid, white dashed, black dotted and black dashed lines) indicate major events, respectively: the TROPOMI processor switch from version 1.2.2 to 1.3.0 in March 2019, the activation of the finer horizontal resolution of TROPOMI in August 2019, the processor switch to 1.4.0 in December 2020 and the processor switch to 2.2.0 in July 2021. (© Update April 6, 2021, of Verhoelst et al., AMT 2021). Stations are ordered by median tropospheric column value.

NO2 tropo mosaic