Aeolian Activity as a Planetary Process

Abstract

Any planet or satellite having a dynamic atmosphere and a solid surface has the potential for aeolian processes. Survey of the solar system shows that wind plays an important, and in some regions, the key role in surface modifications. Most deserts and many coastal areas on Earth are subject to aeolian processes. Seasonal dust storms sweep the surface of Mars, where aeolian activity appears to dominate. Measurements of wind speeds on Venus, observations of its surface, and estimates of particle threshold wind velocities in the venusian environment suggest that aeolian processes operate there as well. Recent discoveries of the predominantly nitrogen atmosphere of Titan raise the possibility of wind activity on this, the largest satellite of Saturn and the only moon known to have an appreciable atmosphere. From the extremely dense, hot atmosphere of Venus to the low atmospheric density of Mars and the extremely cold environment of Titan, there is the opportunity to study a single geological process under a wide range of environments to derive fundamental knowledge of how aeolian processes operate.