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Abstract / Description of output
The englacial stratigraphic architecture of internal‐reflection horizons (IRHs) as imaged by ice‐penetrating radar (IPR) across ice sheets reflects the cumulative effects of surface mass balance, basal melt and ice flow. IRHs, considered isochrones, have typically been traced in interior, slow‐flowing regions. Here, we identify three distinctive IRHs spanning the Institute and Möller catchments that cover 50% of West Antarctica's Weddell Sea Sector and are characterised by a complex system of ice‐stream tributaries. We place age constraints on IRHs through their intersections with previous geophysical surveys tied to Byrd Ice Core, and by age‐depth modeling. We further show where the oldest ice likely exists within the region; and that Holocene ice‐dynamic changes were limited to the catchment's lower reaches. The traced IRHs from this study have clear potential to nucleate a wider continental‐scale IRH database for validating ice‐sheet models.
Original language | English |
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Article number | e2019GL086663 |
Journal | Geophysical Research Letters |
Volume | 47 |
Issue number | 6 |
Early online date | 2 Mar 2020 |
DOIs | |
Publication status | Published - 28 Mar 2020 |
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Dive into the research topics of 'Englacial architecture and age-depth constraints across the West Antarctic Ice Sheet'. Together they form a unique fingerprint.Projects
- 1 Finished
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Airborne geophysical investigation targets basal boundary conditions for the Institute and Moeller Ice Streams, West Antarctica
1/04/10 → 31/07/14
Project: Project from a former institution
Profiles
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Robert Bingham
- School of Geosciences - Personal Chair of Glaciology and Geophysics
Person: Academic: Research Active