Sublimation-driven erosion on Callisto: A landform simulation model test

Details Sublimation-driven erosion on Callisto: A landform simulation model test Sublimation-driven erosion on Callisto: A landform simulation model test

Feb 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3503203h&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 3, CiteID L03203

Physics

1

Planetary Sciences: Solid Surface Planets: Erosion And Weathering, Planetary Sciences: Solid Surface Planets: Surface Materials And Properties, Planetary Sciences: Solid Surface Planets: Ices

Scientific paper

Callisto's landscape exhibits widespread erosion from some non-impact-induced process, which is characterized by smooth, undulating dark albedo surfaces with isolated high albedo knobs that are remnants of crater rims. We develop a landform simulation model that incorporates sublimation erosion of exposed bedrock on crater walls, composed of ice-cemented dust, with non-linear mass wasting of the released dust and redeposition of the ice on convex summits. The model reproduces the essential elements of landscapes on Callisto, and lends strong support to the 1999 hypothesis of Moore and his colleagues that volatile sublimation causes slope-forming bedrock disaggregation and subsequent mass wasting while reprecipitation caps and armors local crests with frost.

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