Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 18, issue 14
Articles | Volume 18, issue 14
https://doi.org/10.5194/amt-18-3393-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-18-3393-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 18, issue 14
Research article
 | 
24 Jul 2025
Research article |  | 24 Jul 2025

Assessment of laboratory O4 (O2–O2 collision-induced) absorption cross-sections at 360 nm using atmospheric long-path DOAS observations

Bianca Lauster, Udo Frieß, Jan-Marcus Nasse, Ulrich Platt, and Thomas Wagner

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Short summary
Remote sensing measurements of scattered sunlight use the atmospheric absorption of O2–O2 (or O4) to derive cloud and aerosol properties. However, inconsistencies between measurements and radiative transfer simulations were found recently, and, so far, there has been no consensus on how to deal with these appropriately. In this study, long-term long-path differential optical absorption spectroscopy (LP-DOAS) observations were analysed and very good agreement with laboratory measurements was found.
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