A. S. McEwen
Papers
2
Total Citations
177
H-Index
2
About
A. S. McEwen is a leading planetary geologist whose research centers on the surface processes and geologic histories of Mars and the Moon, with a particular focus on impact cratering and landscape evolution. A major contribution is their work on the size-frequency distributions of rocks on Mars, where they demonstrated that rocks >1.5 meters in diameter in HiRISE images of the northern plains follow exponential models consistent with lander measurements—a finding critical for assessing landing site safety, such as for the Phoenix mission (104 citations). McEwen also resolved a long-standing puzzle in lunar science by showing that discrepancies in crater size-frequency distributions between coeval geologic units arise from target property contrasts, such as variations in regolith porosity and strength, rather than age differences (73 citations). This work has profound implications for interpreting planetary surface chronologies. McEwen’s research is distinguished by its integration of high-resolution remote sensing with quantitative modeling, advancing our understanding of how impact processes shape planetary surfaces and informing future exploration missions.
Research Focus
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Top Papers
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