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  • 1.
    Lindbäck, Katrin
    et al.
    Norwegian Polar Res Inst, Framsentret, Postboks 6606, N-9296 Tromso, Norway.
    Kohler, Jack
    Norwegian Polar Res Inst, Framsentret, Postboks 6606, N-9296 Tromso, Norway.
    Pettersson, Rickard
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Nuth, Christopher
    Univ Oslo, Postboks 1047 Blindern, N-0316 Oslo, Norway.
    Langley, Kirsty
    Asiaq Greenland Survey, Postboks 1003, Nuuk 3900, Greenland.
    Messerli, Alexandra
    Norwegian Polar Res Inst, Framsentret, Postboks 6606, N-9296 Tromso, Norway.
    Vallot, Dorothée
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Matsuoka, Kenichi
    Norwegian Polar Res Inst, Framsentret, Postboks 6606, N-9296 Tromso, Norway.
    Brandt, Ola
    Norwegian Coastal Adm, Kystveien 30, N-4841 Arendal, Norway.
    Subglacial topography, ice thickness, and bathymetry of Kongsfjorden, northwestern Svalbard2018In: Earth System Science Data, ISSN 1866-3508, E-ISSN 1866-3516, Vol. 10, no 4, p. 1769-1781Article in journal (Refereed)
    Abstract [en]

    Svalbard tidewater glaciers are retreating, which will affect fjord circulation and ecosystems when glacier fronts become land-terminating. Knowledge of the subglacial topography and bathymetry under retreating glaciers is important to modelling future scenarios of fjord circulation and glacier dynamics. We present high-resolution (150m gridded) digital elevation models of subglacial topography, ice thickness, and ice surface elevation of five tidewater glaciers in Kongsfjorden (1100 km(2)), northwestern Spitsbergen, based on similar to 1700 km airborne and ground-based ice-penetrating radar profiles. The digital elevation models (DEMs) cover the tidewater glaciers Blomstrandbreen, Conwaybreen, Kongsbreen, Kronebreen, and Kongsvegen and are merged with bathymetric and land DEMs for the non-glaciated areas. The large-scale subglacial topography of the study area is characterized by a series of troughs and highs. The minimum subglacial elevation is 180m above sea level (a.s.l.), the maximum subglacial elevation is 1400m a.s.l., and the maximum ice thickness is 740m. Three of the glaciers, Kongsbreen, Kronebreen, and Kongsvegen, have the potential to retreat by similar to 10 km before they become land-terminating. The compiled data set covers one of the most studied regions in Svalbard and is valuable for future studies of glacier dynamics, geology, hydrology, and fjord circulation.

  • 2.
    Lindbäck, Katrin
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Pettersson, Rickard
    Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
    Doyle, S. H.
    Helanow, C.
    Jansson, P.
    Kristensen, S. S.
    Stenseng, L.
    Forsberg, R.
    Hubbard, A. L.
    High-resolution ice thickness and bed topography of a land-terminating section of the Greenland Ice Sheet2014In: Earth System Science Data, ISSN 1866-3508, E-ISSN 1866-3516, Vol. 6, no 2, p. 331-338Article in journal (Refereed)
    Abstract [en]

    We present ice thickness and bed topography maps with a high spatial resolution (250–500 m) of a land-terminating section of the Greenland Ice Sheet derived from ground-based and airborne radar surveys. The data have a total area of ~12 000 km2 and cover the whole ablation area of the outlet glaciers of Isunnguata Sermia, Russell, Leverett, Ørkendalen and Isorlersuup up to the long-term mass balance equilibrium line altitude at ~1600 m above sea level. The bed topography shows highly variable subglacial trough systems, and the trough of Isunnguata Sermia Glacier is overdeepened and reaches an elevation of ~500 m below sea level. The ice surface is smooth and only reflects the bedrock topography in a subtle way, resulting in a highly variable ice thickness. The southern part of our study area consists of higher bed elevations compared to the northern part. The compiled data sets of ground-based and airborne radar surveys cover one of the most studied regions of the Greenland Ice Sheet and can be valuable for detailed studies of ice sheet dynamics and hydrology. The combined data set is freely available at doi:10.1594/pangaea.830314.

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