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 language | English |
|---|---|
| Pages (from-to) | 22-28 |
| Number of pages | 7 |
| Journal | Annals of Glaciology |
| Volume | 55 |
| Issue number | 67 |
| DOIs | |
| Publication status | Published - 1 Jun 2014 |
Keywords
- Antarctic glaciology
- Glaciological instruments and methods
- Ground-penetrating radar
- Ice-shelf tributary glaciers
- Radio-echo sounding