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    Morphology, development, and sediment dynamics of elongating linear dunes on Mars

    Davis, J.M. and Banham, S.G. and Grindrod, P.M. and Boazman, S.J. and Balme, M.R. and Bristow, Charlie S. (2020) Morphology, development, and sediment dynamics of elongating linear dunes on Mars. Geophysical Research Letters , ISSN 0094-8276. (In Press)

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    Abstract

    Linear dunes occur on planetary surfaces, including Earth, Mars, and Titan, yet their dynamics are poorly understood. Recent studies of terrestrial linear dunes suggest they migrate by elongation only in supply limited environments. Here, we investigate elongating linear dunes in the Hellespontus Montes region of Mars which are morphologically similar to terrestrial systems. Multi-temporal, high-resolution orbital images show these linear dunes migrate by elongation only and that the fixed sediment source of the dunes probably restricts any lateral migration. Some linear dunes maintain their along length volume and elongate at rates comparable to adjacent barchans, whereas those which decrease in volume show no elongation, suggesting they are near steady state, matching morphometric predictions. Limited sediment supply may restrict Martian linear dunes to several kilometres, significantly shorter than many terrestrial linear dunes. Our results demonstrate the close similarities in dune dynamics across the two planetary surfaces.

    Metadata

    Item Type: Article
    Additional Information: Accepted for publication. Copyright American Geophysical Union. Further reproduction or electronic distribution is not permitted.
    Keyword(s) / Subject(s): Linear Dunes, Mars, Aeolian, Remote Sensing, HiRISE
    School: Birkbeck Schools and Departments > School of Science > Earth and Planetary Sciences
    Depositing User: Charlie Bristow
    Date Deposited: 29 May 2020 10:47
    Last Modified: 24 Jun 2020 18:58
    URI: http://eprints.bbk.ac.uk/id/eprint/32017

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