Physics
Scientific paper
Feb 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987icar...69..297s&link_type=abstract
Icarus (ISSN 0019-1035), vol. 69, Feb. 1987, p. 297-313. USAF-supported research.
Physics
58
Galilean Satellites, Icy Satellites, Satellite Surfaces, Separation, Temperature Dependence, Water, Callisto, Ganymede, Micrometeoroids, Satellite Imagery, Sublimation, Jupiter, Satellites, Thermal Properties, Water Ice, Callisto, Ganymede, Europa, Io, Sublimation, Surface, Bright Areas, Deposits, Ions, Size, Sputtering, Micrometorites, Bombardment, Latitude, Diagrams, Time Scale, Calculations, Transport, Impacts, Thickness, Depth, Albedo, Radiation, Spectroscopy, Reflectance, Spectra, Brightness, Temperatu
Scientific paper
Consideration of the thermal sublimation of ice on the Galilean satellites suggests that dirty-ice surfaces are susceptible to a process of cold-trapping of water in local bright patches and its preferential removal from dark areas. The result may be very rapid (decade time scale) segregation of the surface into bright icy regions and regions covered by dark ice-free lag deposits. Ion sputtering and micrometeorite bombardment are probably insufficient to prevent this process at low latitudes on Ganymede and Callisto. Sputtering on Europa may prevent segregation, especially on the trailing side. Segregated regions must be mostly smaller than the kilometer resolution of the Voyager images, but larger than centimeter size.
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