Articles | Volume 20, issue 13
Atmos. Chem. Phys., 20, 8017–8045, 2020
https://doi.org/10.5194/acp-20-8017-2020
Atmos. Chem. Phys., 20, 8017–8045, 2020
https://doi.org/10.5194/acp-20-8017-2020

Research article 10 Jul 2020

Research article | 10 Jul 2020

Validation of Aura-OMI QA4ECV NO2 climate data records with ground-based DOAS networks: the role of measurement and comparison uncertainties

Steven Compernolle et al.

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Latest update: 03 Aug 2021
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Short summary
Tropospheric and stratospheric NO2 columns from the OMI QA4ECV NO2 satellite product are validated by comparison with ground-based measurements at 11 sites. The OMI stratospheric column has a small negative bias, and the OMI tropospheric column has a stronger negative bias relative to the ground-based data. Discrepancies are attributed to comparison errors (e.g. difference in horizontal smoothing) and measurement errors (e.g. clouds, aerosols, vertical smoothing and a priori profile assumptions).
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