Blar i forfatter "Gudlaugsson, Eythor"

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    • Eurasian ice-sheet dynamics and sensitivity to subglacial hydrology 

      Gudlaugsson, Eythor; Humbert, Angelika; Andreassen, Karin; Clason, Caroline C.; Kleiner, Thomas; Beyer, Sebastian (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-04-24)
      Ice-stream dynamics are strongly controlled by processes taking place at the ice/bed interface where subglacial water both lubricates the base and saturates any existing, underlying sediment. Large parts of the former Eurasian ice sheet were underlain by thick sequences of soft, marine sediments and many areas are imprinted with geomorphological features indicative of fast flow and wet basal conditions. ...

    • The influence of a model subglacial lake on ice dynamics and internal layering 

      Gudlaugsson, Eythor; Humbert, Angelika; Kleiner, Thomas; Kohler, Jack; Andreassen, Karin (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-04-05)
      As ice flows over a subglacial lake, the drop in bed resistance leads to an increase in ice velocities and a draw down of isochrones and cold ice. The ice surface flattens as it adjusts to the lack of resisting forces at the base. The rapid transition in velocity induces changes in ice viscosity and releases deformation energy that can raise the temperature locally. Recent studies of Antarctic ...

    • Modelling the subglacial hydrology of the former Barents Sea Ice Sheet 

      Gudlaugsson, Eythor (Doctoral thesis; Doktorgradsavhandling, 2015-12-01)
      Ice dynamics are strongly controlled by processes taking place at the interface between the ice and the underlying bed. In modern day ice sheets, up to 90% of mass is lost through fast-flowing corridors of ice, called ice streams. These are typically underlain by a thin layer of water and wet sediment, both of which promote fast flow. In recent years it has emerged that subglacial hydrology played ...

    • Subglacial roughness of the former Barents Sea ice sheet 

      Gudlaugsson, Eythor; Humbert, A.; Winsborrow, Monica; Andreassen, Karin (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      The roughness of a glacier bed has high importance for the estimation of the sliding velocity and can also provide valuable insights into the dynamics and history of ice sheets, depending on scale. Measurement of basal properties in present-day ice sheets is restricted to ground-penetrating radar and seismics, with surveys retrieving relatively coarse data sets. Deglaciated areas, like the Barents ...