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Publication - Dr Michael Cooper

    Paleofluvial landscape inheritance for Jakobshavn Isbræ catchment, Greenland

    Citation

    Cooper, M, Michaelides, K, Siegert, M & Bamber, J, 2016, ‘Paleofluvial landscape inheritance for Jakobshavn Isbræ catchment, Greenland’. Geophysical Research Letters, vol 42., pp. 6350-6357

    Abstract

    Subglacial topography exerts strong controls on glacier dynamics,
    influencing the orientation and velocity of ice flow, as well as
    modulating the distribution of basal waters and sediment. Bed geometry
    can also provide a long-term record of geomorphic processes, allowing
    insight into landscape evolution, the origin of which may predate ice
    sheet inception. Here we present evidence from ice-penetrating radar
    data for a large dendritic drainage network, radiating inland from
    Jakobshavn Isbræ, Greenland's largest outlet glacier. The size of the
    drainage basin is ∼450,000 km2 and accounts for about 20% of
    the total land area of Greenland. Topographic and basin morphometric
    analyses of an isostatically uplifted (ice-free) bedrock topography
    suggests that this catchment predates ice sheet initiation and has
    likely been instrumental in controlling the location and form of the
    Jakobshavn ice stream, and ice flow from the deep interior to the
    margin, now and over several glacial cycles.

    Full details in the University publications repository