Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 18, issue 19
Articles | Volume 18, issue 19
https://doi.org/10.5194/amt-18-5049-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-18-5049-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 18, issue 19
Research article
 | 
02 Oct 2025
Research article |  | 02 Oct 2025

Performance assessment of the IASI-O3 KOPRA product for observing midlatitude tropospheric ozone evolution for 15 years: validation with ozone sondes and consistency of the three IASI instruments

Gaëlle Dufour, Maxim Eremenko, Juan Cuesta, Gérard Ancellet, Michael Gill, Eliane Maillard Barras, and Roeland Van Malderen

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Short summary
Tropospheric ozone from the three Infrared Atmospheric Sounding Interferometer (IASI) instruments is very consistent (<1 %). The validation against homogenized ozone sondes reveals an overall good agreement with slight biases (3 %–6 %) in tropospheric ozone and a possible temporal drift, but this is difficult to assess due to the limited number of sites. No specific trends are estimated for the tropospheric ozone column for the period 2008–2022, but persistent negative trends are observed in the lower troposphere.
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