Articles | Volume 15, issue 6
Atmos. Meas. Tech., 15, 1703–1728, 2022
https://doi.org/10.5194/amt-15-1703-2022
Atmos. Meas. Tech., 15, 1703–1728, 2022
https://doi.org/10.5194/amt-15-1703-2022
Research article
23 Mar 2022
Research article | 23 Mar 2022

A comparison of the impact of TROPOMI and OMI tropospheric NO2 on global chemical data assimilation

Takashi Sekiya et al.

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Short summary
This study gives a systematic comparison of TROPOMI version 1.2 and OMI QA4ECV tropospheric NO2 column through global chemical data assimilation (DA) integration for April–May 2018. DA performance is controlled by measurement sensitivities, retrieval errors, and coverage. Due to reduced errors in TROPOMI, agreements against assimilated and independent observations were improved by TROPOMI DA compared to OMI DA. These results demonstrate that TROPOMI DA improves global analyses of NO2 and ozone.