Borehole-Based Characterization of Deep Mixed-Mode Crevasses at a Greenlandic Outlet Glacier ...
Funder: Aberystwyth University Capital Equipment Fund ... : AbstractOptical televiewer borehole logging within a crevassed region of fast‐moving Store Glacier, Greenland, revealed the presence of 35 high‐angle planes that cut across the background primary stratification. These planes were composed o...
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2021
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ftdatacite:10.17863/cam.70842 2024-02-27T08:40:44+00:00 Borehole-Based Characterization of Deep Mixed-Mode Crevasses at a Greenlandic Outlet Glacier ... Hubbard, Bryn Christoffersen, Poul Doyle, Samuel H Chudley, Thomas R Schoonman, Charlotte M Law, Robert Bougamont, Marion 2021 https://dx.doi.org/10.17863/cam.70842 https://www.repository.cam.ac.uk/handle/1810/323384 en eng American Geophysical Union (AGU) borehole crevasse deep crevasse glacier Greenland Ice Sheet optical televiewer article-journal ScholarlyArticle JournalArticle Article 2021 ftdatacite https://doi.org/10.17863/cam.70842 2024-02-01T14:49:26Z Funder: Aberystwyth University Capital Equipment Fund ... : AbstractOptical televiewer borehole logging within a crevassed region of fast‐moving Store Glacier, Greenland, revealed the presence of 35 high‐angle planes that cut across the background primary stratification. These planes were composed of a bubble‐free layer of refrozen ice, most of which hosted thin laminae of bubble‐rich “last frozen” ice, consistent with the planes being the traces of former open crevasses. Several such last‐frozen laminae were observed in four traces, suggesting multiple episodes of crevasse reactivation. The frequency of crevasse traces generally decreased with depth, with the deepest detectable trace being 265 m below the surface. This is consistent with the extent of the warmer‐than‐modeled englacial ice layer in the area, which extends from the surface to a depth of ∼400 m. Crevasse trace orientation was strongly clustered around a dip of 63° and a strike that was offset by 71° from orthogonal to the local direction of principal extending strain. The traces’ antecedent crevasses ... Article in Journal/Newspaper glacier Greenland greenlandic 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 |
borehole crevasse deep crevasse glacier Greenland Ice Sheet optical televiewer |
spellingShingle |
borehole crevasse deep crevasse glacier Greenland Ice Sheet optical televiewer Hubbard, Bryn Christoffersen, Poul Doyle, Samuel H Chudley, Thomas R Schoonman, Charlotte M Law, Robert Bougamont, Marion Borehole-Based Characterization of Deep Mixed-Mode Crevasses at a Greenlandic Outlet Glacier ... |
topic_facet |
borehole crevasse deep crevasse glacier Greenland Ice Sheet optical televiewer |
description |
Funder: Aberystwyth University Capital Equipment Fund ... : AbstractOptical televiewer borehole logging within a crevassed region of fast‐moving Store Glacier, Greenland, revealed the presence of 35 high‐angle planes that cut across the background primary stratification. These planes were composed of a bubble‐free layer of refrozen ice, most of which hosted thin laminae of bubble‐rich “last frozen” ice, consistent with the planes being the traces of former open crevasses. Several such last‐frozen laminae were observed in four traces, suggesting multiple episodes of crevasse reactivation. The frequency of crevasse traces generally decreased with depth, with the deepest detectable trace being 265 m below the surface. This is consistent with the extent of the warmer‐than‐modeled englacial ice layer in the area, which extends from the surface to a depth of ∼400 m. Crevasse trace orientation was strongly clustered around a dip of 63° and a strike that was offset by 71° from orthogonal to the local direction of principal extending strain. The traces’ antecedent crevasses ... |
format |
Article in Journal/Newspaper |
author |
Hubbard, Bryn Christoffersen, Poul Doyle, Samuel H Chudley, Thomas R Schoonman, Charlotte M Law, Robert Bougamont, Marion |
author_facet |
Hubbard, Bryn Christoffersen, Poul Doyle, Samuel H Chudley, Thomas R Schoonman, Charlotte M Law, Robert Bougamont, Marion |
author_sort |
Hubbard, Bryn |
title |
Borehole-Based Characterization of Deep Mixed-Mode Crevasses at a Greenlandic Outlet Glacier ... |
title_short |
Borehole-Based Characterization of Deep Mixed-Mode Crevasses at a Greenlandic Outlet Glacier ... |
title_full |
Borehole-Based Characterization of Deep Mixed-Mode Crevasses at a Greenlandic Outlet Glacier ... |
title_fullStr |
Borehole-Based Characterization of Deep Mixed-Mode Crevasses at a Greenlandic Outlet Glacier ... |
title_full_unstemmed |
Borehole-Based Characterization of Deep Mixed-Mode Crevasses at a Greenlandic Outlet Glacier ... |
title_sort |
borehole-based characterization of deep mixed-mode crevasses at a greenlandic outlet glacier ... |
publisher |
American Geophysical Union (AGU) |
publishDate |
2021 |
url |
https://dx.doi.org/10.17863/cam.70842 https://www.repository.cam.ac.uk/handle/1810/323384 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland greenlandic Ice Sheet |
genre_facet |
glacier Greenland greenlandic Ice Sheet |
op_doi |
https://doi.org/10.17863/cam.70842 |
_version_ |
1792047865643663360 |