An improved O2 A band absorption model and its consequences for retrievals of photon paths and surface pressures
An improved O2 A band absorption model and its consequences for retrievals of photon paths and surface pressures
复制标题
改进的 O2 A 带吸收模型及其对光子路径和表面压力反演的影响
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
J. Hartmann
中科院分区：
文献类型：
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作者：
H. Tran;J. Hartmann
[1] Deviations from Voigt line profiles in the O2 A band were pointed out in several laboratory and atmospheric studies. In a recent paper, we proposed a model accounting for line mixing and collision-induced absorption processes for the calculation of absorption by oxygen in this region. The latter was validated by comparison with high-pressure laboratory spectra, but recent tests using atmospheric measurements evidence inadequacies in that model. We now present some improvements of the approach which are validated by comparisons between predictions and both high-pressure laboratory absorption spectra and atmospheric spectra. We also study the consequences for retrievals of atmospheric photon path escape factors and pressures from ground-based Fourier transform solar absorptions. It is shown that this model leads to very satisfactory results, significantly reducing the observed-fitted spectral residuals and the zenith angle dependence of the photon path escape factor observed previously. It also enables accurate determinations of surface pressure from the inversion of atmospheric spectra.
