Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 17, issue 18
Articles | Volume 17, issue 18
https://doi.org/10.5194/amt-17-5491-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-17-5491-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 17, issue 18
Research article
 | 
16 Sep 2024
Research article |  | 16 Sep 2024

Independent validation of IASI/MetOp-A LMD and RAL CH4 products using CAMS model, in situ profiles, and ground-based FTIR measurements

Bart Dils, Minqiang Zhou, Claude Camy-Peyret, Martine De Mazière, Yannick Kangah, Bavo Langerock, Pascal Prunet, Carmine Serio, Richard Siddans, and Brian Kerridge

Data sets

STFC RAL methane retrievals from IASI on board MetOp-A, version 2.0 Richard Siddans et al. https://doi.org/10.5285/f717a8ea622f495397f4e76f777349d1

HIPPO Merged 10-Second Meteorology, Atmospheric Chemistry, and Aerosol Data, Version 1.0 Steven Wofsy et al. https://doi.org/10.3334/CDIAC/HIPPO_010

IAGOS Data Portal D. Boulanger et al. https://iagos.aeris-data.fr/download/

NOAA AirCore atmospheric sampling system profiles (Version 20230831) Bianca Baier et al. https://doi.org/10.15138/6AV0-MY81

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Short summary
The paper discusses two very distinct methane products from the IASI instrument aboard the MetOp-A satellite. One (referred to as LMD NLISv8.3) uses a machine-learning approach, while the other (RALv2.0) uses a more conventional optimal estimation approach. We used a variety of model and independent reference measurement data to assess both products' overall quality, their differences, and specific aspects of each product that would benefit from further analysis by the product development teams.
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