“Cloud slicing” retrievals of the methane concentration in the planetary boundary layer from CHARM-F XCH4 measurements over the Northern Scandinavian wetlandsMathieu Quatrevalet, Andreas Fix, Martin Wirth, Tanja Bodenbach and Philipp RossiEPJ Web Conf., 362 (2026) 09016DOI: https://doi.org/10.1051/epjconf/202636209016