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  • 1
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    Polar margin dunes and winds on Mars (1995)
    In:  CASI
    Details
    Publication Date: 2019-08-17
    Description: The approximately concentric arrangement of layered deposits and dune fields at the two Martian poles may reflect a nearly steady state dispersal of material from the polar deposits. Data on effective surface winds from high resolution Viking Images combined with theory of local winds suggest that the northern dunes are in part confined to a latitude band by winds generated by their own low albedo. Dispersal of the dark sand from the southern polar region is not subject to this kind of feedback because the irregular topography prevents areal accumulations sufficiently extensive to produce winds.
    Keywords: Lunar and Planetary Exploration
    Type: Paper-94JE02639 , MSATT: Mars Surface and Atmosphere Through Time; 100; E3; 5397-5406; NASA/TM-95-207228
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Longitudinal dunes on Mars: Relation to current wind regimes (1995)
    In:  CASI
    Details
    Publication Date: 2019-08-15
    Description: Longitudinal dunes are extremely rare on Mars, but constitute a substantial fraction of terrestrial desert dunes. We report finding isolated examples of longitudinal dunes on Mars and relate their occurrence to expected sand transport regimes. Terrestrial longitudinal dunes form in bimodal and multimodal transport regimes. General circulation models and streak data indicate that bimodal and multimodal transport of sand should be very rare on Mars. Thus the dearth of longitudinal dunes on Mars is consistent with their apparent formation conditions on Earth.
    Keywords: Lunar and Planetary Exploration
    Type: Paper-95JE00225 , MSATT; 100; E3; 5381-5395
    Format: text
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    NASA TECHNICAL REPORTS
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