Physical Conditions of Fast Glacier Flow: 2. Variable Extent of Anisotropic Ice and Soft Basal Sediment From Seismic Reflection Data Acquired on Store Glacier, West Greenland ...
Outlet glaciers of the Greenland Ice Sheet transport ice from the interior to the ocean and contribute directly to sea level rise because because discharge and ablation often exceed the accumulation. To develop a better understanding of these fast flowing glaciers, we investigate the basal condition...
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ftdatacite:10.17863/cam.21073 2024-02-04T10:00:34+01:00 Physical Conditions of Fast Glacier Flow: 2. Variable Extent of Anisotropic Ice and Soft Basal Sediment From Seismic Reflection Data Acquired on Store Glacier, West Greenland ... Hofstede, Coen Christoffersen, P Hubbard, Bryn Doyle, Samuel Young, Tun Jan Diez, Anja Eisen, Olaf Hubbard, Alun 2018 https://dx.doi.org/10.17863/cam.21073 https://www.repository.cam.ac.uk/handle/1810/274391 en eng Wiley-Blackwell open.access Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 http://purl.org/coar/access_right/c_abf2 subglacial sliding deformation anisotropy patches seismic Article ScholarlyArticle JournalArticle article-journal 2018 ftdatacite https://doi.org/10.17863/cam.21073 2024-01-05T13:41:45Z Outlet glaciers of the Greenland Ice Sheet transport ice from the interior to the ocean and contribute directly to sea level rise because because discharge and ablation often exceed the accumulation. To develop a better understanding of these fast flowing glaciers, we investigate the basal conditions of Store Glacier, a large outlet glacier flowing into Uummannaq Fjord in West Greenland. We use two crossing seismic profiles acquired near the centreline, 30 km upstream of the calving front, to interpret the physical nature of the ice and bed. We identify one notably englacial and two notably subglacial seismic reflections on both profiles. The englacial reflection represents a change in crystal orientation fabric, interpreted to be the Holocene–Wisconsin transition. From Amplitude Versus Angle (AVA) analysis we infer that the deepest 80 m of ice of the parallel-flow profile below this reflection is anisotropic with an enhancement of simple shear of 2. The ice is underlain by 45 m of unconsolidated sediments, ... Article in Journal/Newspaper glacier Greenland Ice Sheet Uummannaq DataCite Metadata Store (German National Library of Science and Technology) Greenland Uummannaq Fjord ENVELOPE(-52.968,-52.968,70.925,70.925) |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
subglacial sliding deformation anisotropy patches seismic |
spellingShingle |
subglacial sliding deformation anisotropy patches seismic Hofstede, Coen Christoffersen, P Hubbard, Bryn Doyle, Samuel Young, Tun Jan Diez, Anja Eisen, Olaf Hubbard, Alun Physical Conditions of Fast Glacier Flow: 2. Variable Extent of Anisotropic Ice and Soft Basal Sediment From Seismic Reflection Data Acquired on Store Glacier, West Greenland ... |
topic_facet |
subglacial sliding deformation anisotropy patches seismic |
description |
Outlet glaciers of the Greenland Ice Sheet transport ice from the interior to the ocean and contribute directly to sea level rise because because discharge and ablation often exceed the accumulation. To develop a better understanding of these fast flowing glaciers, we investigate the basal conditions of Store Glacier, a large outlet glacier flowing into Uummannaq Fjord in West Greenland. We use two crossing seismic profiles acquired near the centreline, 30 km upstream of the calving front, to interpret the physical nature of the ice and bed. We identify one notably englacial and two notably subglacial seismic reflections on both profiles. The englacial reflection represents a change in crystal orientation fabric, interpreted to be the Holocene–Wisconsin transition. From Amplitude Versus Angle (AVA) analysis we infer that the deepest 80 m of ice of the parallel-flow profile below this reflection is anisotropic with an enhancement of simple shear of 2. The ice is underlain by 45 m of unconsolidated sediments, ... |
format |
Article in Journal/Newspaper |
author |
Hofstede, Coen Christoffersen, P Hubbard, Bryn Doyle, Samuel Young, Tun Jan Diez, Anja Eisen, Olaf Hubbard, Alun |
author_facet |
Hofstede, Coen Christoffersen, P Hubbard, Bryn Doyle, Samuel Young, Tun Jan Diez, Anja Eisen, Olaf Hubbard, Alun |
author_sort |
Hofstede, Coen |
title |
Physical Conditions of Fast Glacier Flow: 2. Variable Extent of Anisotropic Ice and Soft Basal Sediment From Seismic Reflection Data Acquired on Store Glacier, West Greenland ... |
title_short |
Physical Conditions of Fast Glacier Flow: 2. Variable Extent of Anisotropic Ice and Soft Basal Sediment From Seismic Reflection Data Acquired on Store Glacier, West Greenland ... |
title_full |
Physical Conditions of Fast Glacier Flow: 2. Variable Extent of Anisotropic Ice and Soft Basal Sediment From Seismic Reflection Data Acquired on Store Glacier, West Greenland ... |
title_fullStr |
Physical Conditions of Fast Glacier Flow: 2. Variable Extent of Anisotropic Ice and Soft Basal Sediment From Seismic Reflection Data Acquired on Store Glacier, West Greenland ... |
title_full_unstemmed |
Physical Conditions of Fast Glacier Flow: 2. Variable Extent of Anisotropic Ice and Soft Basal Sediment From Seismic Reflection Data Acquired on Store Glacier, West Greenland ... |
title_sort |
physical conditions of fast glacier flow: 2. variable extent of anisotropic ice and soft basal sediment from seismic reflection data acquired on store glacier, west greenland ... |
publisher |
Wiley-Blackwell |
publishDate |
2018 |
url |
https://dx.doi.org/10.17863/cam.21073 https://www.repository.cam.ac.uk/handle/1810/274391 |
long_lat |
ENVELOPE(-52.968,-52.968,70.925,70.925) |
geographic |
Greenland Uummannaq Fjord |
geographic_facet |
Greenland Uummannaq Fjord |
genre |
glacier Greenland Ice Sheet Uummannaq |
genre_facet |
glacier Greenland Ice Sheet Uummannaq |
op_rights |
open.access Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 http://purl.org/coar/access_right/c_abf2 |
op_doi |
https://doi.org/10.17863/cam.21073 |
_version_ |
1789965913582206976 |