Articles | Volume 18, issue 19
https://doi.org/10.5194/amt-18-5049-2025
https://doi.org/10.5194/amt-18-5049-2025
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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Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2024-4096', Anonymous Referee #1, 31 Jan 2025
    • AC1: 'Reply on RC1', Gaëlle Dufour, 17 Apr 2025
  • RC2: 'Comment on egusphere-2024-4096', Alistair Bell, 06 Feb 2025
    • AC2: 'Reply on RC2', Gaëlle Dufour, 17 Apr 2025
  • RC3: 'Comment on egusphere-2024-4096', Anonymous Referee #3, 14 Feb 2025
    • AC3: 'Reply on RC3', Gaëlle Dufour, 17 Apr 2025
  • RC4: 'Comment on egusphere-2024-4096', Anonymous Referee #4, 23 Feb 2025
    • AC4: 'Reply on RC4', Gaëlle Dufour, 17 Apr 2025

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
AR by Gaëlle Dufour on behalf of the Authors (17 Apr 2025)  Author's response   Author's tracked changes   Manuscript 
ED: Referee Nomination & Report Request started (22 Apr 2025) by Meng Gao
RR by Anonymous Referee #3 (22 Apr 2025)
RR by Anonymous Referee #1 (23 Apr 2025)
RR by Anonymous Referee #2 (06 May 2025)
ED: Publish as is (08 May 2025) by Meng Gao
AR by Gaëlle Dufour on behalf of the Authors (21 Jul 2025)
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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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