An accurate representation of the transmission functions of the H2O and CO2 infrared bands

A simple but accurate formula is given that describes the characteristics of the transmission function of gaseous absorption bands which are not well described by the Mayer-Goody random band model (e.g. the effect of the difference of line-intensity distribution between wavenumber intervals). The temperature dependence of the transmission function is also well described.The parameters for our model have been determined for infrared bands of water vapor and carbon dioxide by fitting values of transmittance calculated from line parameter data of McClatchey et al. The results have been compared with experimental measurements.