An improved O2 A band absorption model and its consequences for retrievals of photon paths and surface pressures

摘要: [1] Deviations from Voigt line profiles in the O2 A band were pointed out several laboratory and atmospheric studies. In a recent paper, we proposed model accounting for mixing collision-induced absorption processes calculation of by oxygen this region. The latter was validated comparison with high-pressure spectra, but tests using measurements evidence inadequacies that model. We now present some improvements approach which are comparisons between predictions both spectra spectra. also study consequences retrievals photon path escape factors pressures ground-based Fourier transform solar absorptions. It is shown leads to very satisfactory results, significantly reducing observed-fitted spectral residuals zenith angle dependence factor observed previously. enables accurate determinations surface pressure inversion