Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 19, issue 12
Articles | Volume 19, issue 12
https://doi.org/10.5194/amt-19-4233-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-19-4233-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 12
Research article
 | 
30 Jun 2026
Research article |  | 30 Jun 2026

Improved NO2 spectral fits for TROPOMI and OMI by removing wavelengths around 430 nm

Jos van Geffen, Henk Eskes, Maarten Sneep, Mark ter Linden, and J. Pepijn Veefkind

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Short summary
The Fraunhofer absorption feature at 430 nm, which varies in strength with the solar activity cycle influences the retrieval of nitrogen dioxide (NO2) from from Tropospheric Monitoring Instrument (TROPOMI) and Ozone Monitoring Instrument (OMI) measurements. This study describes the benefits of removing the wavelength range 428–433 nm from the retrieval, which is implemented for TROPOMI retrievals as of v2.9.1.
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