Mars exhibits diverse surface changes at all latitudes and all seasons. Active processes include impact cratering, aeolian sand and dust transport, a variety of slope processes, changes in polar ices, and diverse effects of seasonal CO2 frost. The extent of surface change has been surprising and indicates that the present climate is capable of reshaping the surface. Activity has important implications for the Amazonian history of Mars: understanding processes is a necessary step before we can understand their implications and variations over time.
Keywords: Mars; aeolian processes; impact cratering; seasonal processes; surface changes.
© 2021. The Authors. This article has been contributed to by US Government employees and their work is in the public domain in the USA.