Near-surface characteristics of the firn pack at the Recovery catchment revealed by an ultra-wide band ground based radar
Abstract
High-frequency radar data were collected during the Norwegian-US traverse from South Pole to Troll Station in 2008/09. The traverse route went directly over the Recovery catchment upstream of Recovery ice stream. This area consists of four lake type features previously identified from remote sensing data and recently studied with a low frequency radar revealing the basal characteristics of the area. We used a ground-based high-frequency FMCW radar with a center frequency of 1.75 GHz to profile the uppermost 100 m of the firn pack. We combine radar and dated firn core data to determine local accumulation anomalies and areas of temporally variable flow velocities potentially indicating flow events in past at the remotely defined lake margins. The radar data reveal areas of potential wind glaze and subsurface metamorphic firn layers related to the basal topography of the ice sheet.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2011
- Bibcode:
- 2011AGUFM.C33C0655S
- Keywords:
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- 0736 CRYOSPHERE / Snow