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.

Data sets

QA4ECV NO2 tropospheric and stratospheric vertical column data from OMI (Version 1.1) K. F. Boersma, H. Eskes, A. Richter, I. De Smedt, A. Lorente, S. Beirle, J. Van Geffen, E. Peters, M. Van Roozendael, and T. Wagner https://doi.org/10.21944/qa4ecv-no2-omi-v1.1

OMI/Aura Nitrogen Dioxide (NO2) Total and Tropospheric Column 1-orbit L2 Swath 13x24 km V003 Nickolay A. Krotkov, Lok N. Lamsal, Sergey V. Marchenko, Edward A. Celarier, Eric J. Bucsela, William H. Swartz, Joanna Joiner, and the OMI core team https://doi.org/10.5067/Aura/OMI/DATA2017

TROPOMI Level 2 Nitrogen Dioxide total column products, Version 01 Copernicus Sentinel-5P (processed by ESA) https://doi.org/10.5270/S5P-s4ljg54

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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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