Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 43, Issue 18, Pages 9484-9491Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1002/2016GL070138
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- NSERC
- NSERC/CSA/MDA Industrial Research Chair in Planetary Geology
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Morphological analyses of Utopia Planitia, Mars, have led to the hypothesis that the region contains a substantial amount of near-surface ice. This paper tests this hypothesis using ground-penetrating radar techniques. We have identified an expansive radar reflective region spanning approximately 375,000 km(2) in SHAllow RADar (SHARAD) data over western Utopia Planitia. The SHARAD reflective regions coincides with high densities of scalloped depressions and polygonal terrain. The reflectors are associated with layered mesas similar to 80-170 m thick. We find a value of 2.8 +/- 0.8 for the dielectric constant of the material overlying the reflectors. This work finds that the dielectric constant is consistent with a mixture of ice, air, and dust, containing a water ice volume up to 14,300 km(3) in this unit.
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