3-D Modeling of Landscape-Modifying Processes on Icy Planetary Surfaces

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5405 Atmospheres (0343, 1060), 5410 Composition (1060, 3672), 5422 Ices, 5430 Interiors (8147), 5480 Volcanism (6063, 8148, 8450)

Scientific paper

We will evaluate the sequence and extent of various landform-modifying erosional and volatile redistribution processes that have shaped the Galilean satellites using a 3-D model that simulates the following surface and subsurface processes: 1) sublimation and re-condensation of volatiles; 2) development of refractory lag deposits; 3) radiative heating/cooling of the surface (including reflection, emission, and shadowing by other surface elements); 4) thermal diffusion; and 5) vapor diffusion. All processes will be modeled as a function of slope, orientation, albedo, diurnal (or geothermal) heat variations, and the thermo-physical properties of the substrate. The model will provide explicit simulations of landform development and thusly will predict the topographic and volatile evolution of the surface and final landscape form as constrained by DEMs.

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