Terrain Darkening on Iapetus: An Analysis of Processes Leading to Global and Local Dichotomy Features

Details Terrain Darkening on Iapetus: An Analysis of Processes Leading to Global and Local Dichotomy Features Terrain Darkening on Iapetus: An Analysis of Processes Leading to Global and Local Dichotomy Features

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf.1076g&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.1076

Computer Science

Scientific paper

We studied the insolation geometry using different models for the reflection. A model derived from [3] with a linear interpolation between lunar and Lambert-like scattering reproduced the dark patterns relatively well (Fig. 2). To understand the exact nature of the threshold necessary for the darkening process, we simulated different crater characteristics. Taking the latitude of the craters into account, we get an averaged energy flux. With the knowledge of the temperature-dependence of the sublimation (compare [4]) we can estimate the sublimation rate needed to trigger the feedback and compare it with estimates for the global process.

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