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A microphysically-based approach to modeling emissivity and albedo of the martian seasonal caps |
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| Authors: | Janusz Eluszkiewicz Jean-Luc Moncet Gary B Hansen |
| Institution: | a Atmospheric and Environmental Research, Inc., 131 Hartwell Avenue, Lexington, MA 02421-3126, USA b U.S. Geological Survey, Astrogeology Team, 2255 N. Gemini Drive, Flagstaff, AZ 86001, USA c Planetary Science Institute, NW Division, Department of Earth and Space Sciences, University of Washington, Seattle, WA 98195-1310, USA |
| Abstract: | A new model of albedo and emissivity of the martian seasonal caps represented as porous CO2 slabs containing spherical voids and dust particles is described. In the model, a radiative transfer model is coupled with a microphysical model in order to link changes in albedo and emissivity to changes in porosity caused by ice metamorphism. The coupled model is capable of reproducing temporal changes in the spectra of the caps taken by the Thermal Emission Spectrometer onboard the Mars Global Surveyor and it can be used as the forward model in the retrievals of the caps' physical properties (porosity, dust abundance, void and dust grain size) from the spectra. Preliminary results from such inversion studies are presented. |
| Keywords: | Mars surface Radiative transfer Ices Infrared observations |
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