Journal article

A high-resolution bedrock map for the Antarctic Peninsula

  • Huss, Matthias Laboratory of Hydraulics, Hydrology and Glaciology (VAW), ETH Zurich, Switzerland - Department of Geosciences, University of Fribourg, Switzerland
  • Farinotti, Daniel German Research Centre for Geosciences (GFZ), Telegrafenberg, Potsdam, Germany
    18.07.2014
Published in:
  • The Cryosphere. - 2014, vol. 8, no. 4, p. 1261–1273
English Assessing and projecting the dynamic response of glaciers on the Antarctic Peninsula to changed atmospheric and oceanic forcing requires high-resolution ice thickness data as an essential geometric constraint for ice flow models. Here, we derive a complete bedrock data set for the Antarctic Peninsula north of 70° S on a 100 m grid. We calculate distributed ice thickness based on surface topography and simple ice dynamic modelling. Our approach is constrained with all available thickness measurements from Operation IceBridge and gridded ice flow speeds for the entire study region. The new data set resolves the rugged subglacial topography in great detail, indicates deeply incised troughs, and shows that 34% of the ice volume is grounded below sea level. The Antarctic Peninsula has the potential to raise global sea level by 69 ± 5 mm. In comparison to Bedmap2, covering all Antarctica on a 1 km grid, a significantly higher mean ice thickness (+48%) is found.
Faculty
Faculté des sciences et de médecine
Department
Département de Géosciences
Language
  • English
Classification
Hydrology
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/303719
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