Computer Science
Scientific paper
Aug 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000mpse.conf...93k&link_type=abstract
International Conference on Mars Polar Science and Exploration, p. 93
Computer Science
3
Mars (Planet), Albedo, Carbon Dioxide, Ice, Mars Surface, Porosity, Slabs, Thermal Emission, Planetary Geology, Grain Size, Solar Flux, Solar Radiation
Scientific paper
Thermal Emission Spectrometer (TES) observations indicate that some areas of Mars' seasonal south cap, informally called the "Cryptic" region, are composed of CO2 ice of indeterminately large grain size. The low albedo of this material indicates that a large fraction of the solar flux is being absorbed in or beneath this slab. The surface reflection and transmission of a plane-parallel slab of pure CO2 were calculated using the complex index of refraction. A CO2 ice slab is virtually transparent to solar radiation (72 percent of solar energy incident at 60 degrees off vertical will reach the bottom of a 1 m thick layer) whereas thermal emission effectively comes from about 8 mm depth. The upper centimeter or so is in net radiative loss and will anneal any initial porosity or cavities that form in this region. Additional information can be found in the original extended abstract.
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