Viscous liquid film flow on dune slopes of Mars |
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| Authors: | Diedrich Möhlmann Akos Kereszturi |
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| Institution: | a DLR Institut für Planetenforschung, Rutherfordstr. 2, D-12489 Berlin, Germany
b Collegium Budapest, Institute for Advanced Study, H-1041 Budapest, Szentharomsag 2 utca, Hungary |
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| Abstract: | It is shown that viscous liquid film flow (VLF-flow) on the surfaces of slopes of martian dunes can be a low-temperature rheological phenomenon active today on high latitudes. A quantitative model indicates that the VLF-flows are consistent with the flow of liquid brines similar to that observed by imaging at the Phoenix landing site. VLF-flows depend on the viscosity, dynamics, and energetics of temporary darkened liquid brines. The darkening of the flowing brine is possibly, at least partially, attributed to non-volatile ingredients of the liquid brines. Evidence of previous VLF-flows can also be seen on the dunes, suggesting that it is an ongoing process that also occurred in the recent past. |
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| Keywords: | Ices Mars Polar caps |
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