Effects of Co2 Condensation on Meridional Mass Flows in the Winter Polar

Introduction: Many local dust storms have been observed near the polar cap edges [1]. Some local dust storms near the polar cap edges grew into a global dust storm [2,3]. Using a GCM, [4] showed that dust artificially injected into the atmosphere near the southern cap edge in the southwest Hellas Basin moved to the north along the western inner rim of the basin. This movement of dust simulated by [4] was relevant to that of the local dust storms which were early aspects of the global dust storm in 2001 reported by [2]. However, their GCM did not take into account the atmospheric mass change due to CO 2 condensation, which would be expected to affect the movement of localized dust near the cap edge.