Physics
Scientific paper
Jun 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990icar...85..309r&link_type=abstract
Icarus (ISSN 0019-1035), vol. 85, June 1990, p. 309-325.
Physics
36
Heat Transmission, Io, Satellite Atmospheres, Satellite Surfaces, Topography, Galilean Satellites, Lithosphere, Planetary Mantles, Jupiter, Satellites, Io, Interior, Structure, Distribution, Temperature, Topography, Asthenosphere, Viscosity, Mantle, Models, Heat Flow, Basins, Tidal Effects, Thickness, Density, Diagrams, Dissipation, Temperature, Equatorial Regions
Scientific paper
A global topography is presently calculated for two multilayer Io models in which dissipation occurs in a viscous asthenosphere and a solid mantle: (1) a 'thermal swell' model, in which topography and heat flow are positively correlated, and (2) a 'differentiated lithosphere' model, in which topography and heat flow are negatively correlated. Both the polar topography and the hypsometric distribution of elevations in the differentiated lithosphere model are better matched with observations than the thermal swell model. The shift of the equatorial basin-swell pattern indicates a recent zonal rotation of about 25 deg for Io's lithosphere.
Gaskell Robert W.
Ross Martin N.
Schubert Gerald
Spohn Tilman
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