Bed topography and subglacial landforms in the onset region of the Northeast Greenland Ice Stream
The Northeast Greenland Ice Stream (NEGIS) is an important dynamic component for the total mass balance of the Greenland ice sheet, as it reaches up to the central divide and drains 12% of the ice sheet. The geometric boundary conditions and in particular the nature of the subglacial bed of the NEGI...
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ftdatacite:10.5445/ir/1000117782 2023-05-15T16:03:50+02:00 Bed topography and subglacial landforms in the onset region of the Northeast Greenland Ice Stream Franke, Steven Jansen, Daniela Binder, Tobias Dörr, Nils Helm, Veit Paden, John Steinhage, Daniel Eisen, Olaf 2020 PDF https://dx.doi.org/10.5445/ir/1000117782 https://publikationen.bibliothek.kit.edu/1000117782 en eng Cambridge University Press (CUP) Creative Commons Namensnennung 4.0 International Open Access info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/deed.de CC-BY Glacial geomorphology glacier flow ice streams processes and landforms ofglacial erosion radio-echo sounding Text article-journal Journal Article ScholarlyArticle 2020 ftdatacite https://doi.org/10.5445/ir/1000117782 2021-11-05T12:55:41Z The Northeast Greenland Ice Stream (NEGIS) is an important dynamic component for the total mass balance of the Greenland ice sheet, as it reaches up to the central divide and drains 12% of the ice sheet. The geometric boundary conditions and in particular the nature of the subglacial bed of the NEGIS are essential to understand its ice flow dynamics. We present a record of more than 8000 km of radar survey lines of multi-channel, ultra-wideband radio echo sounding data covering an area of 24 000 km2, centered on the drill site for the East Greenland Ice-core Project (EGRIP), in the upper part of the NEGIS catchment. Our data yield a new detailed model of ice-thickness distribution and basal topography in the region. The enhanced resolution of our bed topography model shows features which we interpret to be caused by erosional activity, potentially over several glacial–interglacial cycles. Off-nadir reflections from the ice–bed interface in the center of the ice stream indicate a streamlined bed with elongated subglacial landforms. Our new bed topography model will help to improve the basal boundary conditions of NEGIS prescribed for ice flow models and thus foster an improved understanding of the ice-dynamic setting. Text East Greenland East Greenland Ice-core Project glacier Greenland Greenland ice core Greenland Ice core Project ice core Ice Sheet DataCite Metadata Store (German National Library of Science and Technology) Greenland |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Glacial geomorphology glacier flow ice streams processes and landforms ofglacial erosion radio-echo sounding |
spellingShingle |
Glacial geomorphology glacier flow ice streams processes and landforms ofglacial erosion radio-echo sounding Franke, Steven Jansen, Daniela Binder, Tobias Dörr, Nils Helm, Veit Paden, John Steinhage, Daniel Eisen, Olaf Bed topography and subglacial landforms in the onset region of the Northeast Greenland Ice Stream |
topic_facet |
Glacial geomorphology glacier flow ice streams processes and landforms ofglacial erosion radio-echo sounding |
description |
The Northeast Greenland Ice Stream (NEGIS) is an important dynamic component for the total mass balance of the Greenland ice sheet, as it reaches up to the central divide and drains 12% of the ice sheet. The geometric boundary conditions and in particular the nature of the subglacial bed of the NEGIS are essential to understand its ice flow dynamics. We present a record of more than 8000 km of radar survey lines of multi-channel, ultra-wideband radio echo sounding data covering an area of 24 000 km2, centered on the drill site for the East Greenland Ice-core Project (EGRIP), in the upper part of the NEGIS catchment. Our data yield a new detailed model of ice-thickness distribution and basal topography in the region. The enhanced resolution of our bed topography model shows features which we interpret to be caused by erosional activity, potentially over several glacial–interglacial cycles. Off-nadir reflections from the ice–bed interface in the center of the ice stream indicate a streamlined bed with elongated subglacial landforms. Our new bed topography model will help to improve the basal boundary conditions of NEGIS prescribed for ice flow models and thus foster an improved understanding of the ice-dynamic setting. |
format |
Text |
author |
Franke, Steven Jansen, Daniela Binder, Tobias Dörr, Nils Helm, Veit Paden, John Steinhage, Daniel Eisen, Olaf |
author_facet |
Franke, Steven Jansen, Daniela Binder, Tobias Dörr, Nils Helm, Veit Paden, John Steinhage, Daniel Eisen, Olaf |
author_sort |
Franke, Steven |
title |
Bed topography and subglacial landforms in the onset region of the Northeast Greenland Ice Stream |
title_short |
Bed topography and subglacial landforms in the onset region of the Northeast Greenland Ice Stream |
title_full |
Bed topography and subglacial landforms in the onset region of the Northeast Greenland Ice Stream |
title_fullStr |
Bed topography and subglacial landforms in the onset region of the Northeast Greenland Ice Stream |
title_full_unstemmed |
Bed topography and subglacial landforms in the onset region of the Northeast Greenland Ice Stream |
title_sort |
bed topography and subglacial landforms in the onset region of the northeast greenland ice stream |
publisher |
Cambridge University Press (CUP) |
publishDate |
2020 |
url |
https://dx.doi.org/10.5445/ir/1000117782 https://publikationen.bibliothek.kit.edu/1000117782 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
East Greenland East Greenland Ice-core Project glacier Greenland Greenland ice core Greenland Ice core Project ice core Ice Sheet |
genre_facet |
East Greenland East Greenland Ice-core Project glacier Greenland Greenland ice core Greenland Ice core Project ice core Ice Sheet |
op_rights |
Creative Commons Namensnennung 4.0 International Open Access info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/deed.de |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5445/ir/1000117782 |
_version_ |
1766399524620730368 |