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

Daniel Farinotti, Edward C. King, Anika Albrecht, Matthias Huss, G. Hilmar Gudmundsson

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)22-28
Number of pages7
JournalAnnals of Glaciology
Volume55
Issue number67
DOIs
Publication statusPublished - 1 Jun 2014

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