The bedrock topography of Starbuck Glacier, Antarctic Peninsula, as determined by radio-echo soundings and flow modeling
- Farinotti, Daniel Laboratory of Hydraulics, Hydrology and Glaciology (VAW), ETH, Zürich, Switzerland - German Research Centre for Geosciences (GFZ), Potsdam, Germany
- King, Edward C. British Antarctic Survey, Natural Environment Research Council, Cambridge, UK
- Albrecht, Anika University of Potsdam, Potsdam, Germany
- Huss, Matthias 5Department of Geosciences, University of Fribourg, Switzerland
- Gudmundsson, G. Hilmar British Antarctic Survey, Natural Environment Research Council, Cambridge, UK - State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, China
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01.07.2014
Published in:
- Annals of Glaciology. - 2014, vol. 55, no. 67, p. 22–28
English
A glacier-wide ice-thickness distribution and bedrock topography is presented for Starbuck Glacier, Antarctic Peninsula. The results are based on 90 km of ground-based radio-echo sounding lines collected during the 2012/13 field season. Cross-validation with ice-thickness measurements provided by NASA's IceBridge project reveals excellent agreement. Glacier-wide estimates are derived using a model that calculates distributed ice thickness, calibrated with the radio-echo soundings. Additional constraints are obtained from in situ ice flow-speed measurements and the surface topography. The results indicate a reverse-sloped bed extending from a riegel occurring ∼5 km upstream of the current grounding line. The deepest parts of the glacier are as much as 500 m below sea level. The calculated total volume of 80.7 ± 7.2 km3 corresponds to an average ice thickness of 312 ± 30 m.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Géosciences
- Language
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- English
- Classification
- Hydrology
- License
- License undefined
- Identifiers
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- RERO DOC 211421
- DOI 10.3189/2014AoG67A025
- Persistent URL
- https://folia.unifr.ch/unifr/documents/303693
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