Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 18, issue 11
Articles | Volume 18, issue 11
https://doi.org/10.5194/amt-18-2353-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-18-2353-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 18, issue 11
Research article
 | 
03 Jun 2025
Research article |  | 03 Jun 2025

Advancing CH4 and N2O retrieval strategies for NDACC/IRWG FTIR observations with the support of airborne in situ measurements

Ivan Ortega, James W. Hannigan, Bianca C. Baier, Kathryn McKain, and Dan Smale

Data sets

SFIT4 Line-by-line non- linear spectral fitting software: version 1.0.21 James Hannigan et al. https://doi.org/10.18758/CLYG3EUO

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

NOAA Global Greenhouse Gas Reference Network Flask-Air PFP Sample Measurements of CO2, CH4, CO, N2O, H2, SF6 and isotopic ratios collected from aircraft vertical profiles Kathryn McKain et al. https://doi.org/10.15138/39HR-9N34

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Short summary
This study evaluates retrieval strategies for CH4 and N2O using high-resolution FTIR observations from Boulder, Colorado. By comparing results with independent AirCore and aircraft in situ measurements, the analysis validates retrieval accuracy and quantifies uncertainties. The findings highlight the benefits of updated spectroscopy and improved a priori profiles and highlight consistent agreement with in situ data.
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