The bedrock topography of Starbuck Glacier, Antarctic Peninsula, as determined by radio-echo soundings and flow modeling

A glacier-wide ice-thickness distribution and bedrock topography is presented for Starbuck Glacier, Antarctic Peninsula. The results are based on 90km of ground-based radio-echo sounding lines collected during the 2012/13 field season. Cross-validation with ice-thickness measurements provided by NAS...

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Bibliographic Details
Published in:Annals of Glaciology
Main Authors: Farinotti, Daniel, King, Edward, Albrecht, Anika, Huss, Matthias, Gudmundsson, Hilmar
Format: Article in Journal/Newspaper
Language:unknown
Published: International Glaciological Society 2014
Subjects:
F800 Physical and Terrestrial Geographical and Environmental Sciences
Antarctic
Antarctic Peninsula
Starbuck Glacier
Annals of Glaciology
Antarc*
Online Access:https://nrl.northumbria.ac.uk/id/eprint/34957/
https://doi.org/10.3189/2014AoG67A025
Description
Summary:A glacier-wide ice-thickness distribution and bedrock topography is presented for Starbuck Glacier, Antarctic Peninsula. The results are based on 90km 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 ̃5km upstream of the current grounding line. The deepest parts of the glacier are as much as 500m below sea level. The calculated total volume of 80.7±7.2km3 corresponds to an average ice thickness of 312±30 m.

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