Influence of ice films morphology on HCl uptake

The role of ice films morphology in increasing HCl uptake is investigated within an analytical approach. The surface corrugation is assumed to be either fixed (quenched disorder) or to vary with adsorption (self-consistent). These two mechanisms exhibit a similar pressure variation, but give different dependencies on the corrugation thickness. The self-consistent mechanism is found to be more efficient in increasing coverage. Assuming that for the surface adsorption the corrugation thickness is related to the total ice film thickness, a comparison of the theoretical predictions to experimental data on HCl–ice at stratospheric conditions is done.