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
-
- RERO DOC 211425
- DOI 10.5194/tc-8-1261-2014
- Persistent URL
- https://folia.unifr.ch/unifr/documents/303719
Statistics
Document views: 56
File downloads:
- hus_hrb.pdf: 99