Hard rock landforms generate 130 km ice shelf channels through water focusing in basal corrugations.
Satellite imagery reveals flowstripes on Foundation Ice Stream parallel to ice flow, and meandering features on the ice-shelf that cross-cut ice flow and are thought to be formed by water exiting a well-organised subglacial system. Here, ice-penetrating radar data show flow-parallel hard-bed landfor...
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Language: | English |
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ftcdlib:qt3572t71b 2023-05-15T16:17:58+02:00 Hard rock landforms generate 130 km ice shelf channels through water focusing in basal corrugations. Jeofry, Hafeez Ross, Neil Le Brocq, Anne Graham, Alastair GC Li, Jilu Gogineni, Prasad Morlighem, Mathieu Jordan, Thomas Siegert, Martin J 4576 2018-11-01 application/pdf http://www.escholarship.org/uc/item/3572t71b english eng eScholarship, University of California qt3572t71b http://www.escholarship.org/uc/item/3572t71b Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ CC-BY Jeofry, Hafeez; Ross, Neil; Le Brocq, Anne; Graham, Alastair GC; Li, Jilu; Gogineni, Prasad; et al.(2018). Hard rock landforms generate 130 km ice shelf channels through water focusing in basal corrugations. Nature communications, 9(1), 4576. doi:10.1038/s41467-018-06679-z. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/3572t71b MD Multidisciplinary article 2018 ftcdlib https://doi.org/10.1038/s41467-018-06679-z 2019-03-15T23:52:15Z Satellite imagery reveals flowstripes on Foundation Ice Stream parallel to ice flow, and meandering features on the ice-shelf that cross-cut ice flow and are thought to be formed by water exiting a well-organised subglacial system. Here, ice-penetrating radar data show flow-parallel hard-bed landforms beneath the grounded ice, and channels incised upwards into the ice shelf beneath meandering surface channels. As the ice transitions to flotation, the ice shelf incorporates a corrugation resulting from the landforms. Radar reveals the presence of subglacial water alongside the landforms, indicating a well-organised drainage system in which water exits the ice sheet as a point source, mixes with cavity water and incises upwards into a corrugation peak, accentuating the corrugation downstream. Hard-bedded landforms influence both subglacial hydrology and ice-shelf structure and, as they are known to be widespread on formerly glaciated terrain, their influence on the ice-sheet-shelf transition could be more widespread than thought previously. Article in Journal/Newspaper Foundation Ice Stream Ice Sheet Ice Shelf University of California: eScholarship Foundation Ice Stream ENVELOPE(-60.000,-60.000,-83.250,-83.250) Nature Communications 9 1 |
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University of California: eScholarship |
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language |
English |
topic |
MD Multidisciplinary |
spellingShingle |
MD Multidisciplinary Jeofry, Hafeez Ross, Neil Le Brocq, Anne Graham, Alastair GC Li, Jilu Gogineni, Prasad Morlighem, Mathieu Jordan, Thomas Siegert, Martin J Hard rock landforms generate 130 km ice shelf channels through water focusing in basal corrugations. |
topic_facet |
MD Multidisciplinary |
description |
Satellite imagery reveals flowstripes on Foundation Ice Stream parallel to ice flow, and meandering features on the ice-shelf that cross-cut ice flow and are thought to be formed by water exiting a well-organised subglacial system. Here, ice-penetrating radar data show flow-parallel hard-bed landforms beneath the grounded ice, and channels incised upwards into the ice shelf beneath meandering surface channels. As the ice transitions to flotation, the ice shelf incorporates a corrugation resulting from the landforms. Radar reveals the presence of subglacial water alongside the landforms, indicating a well-organised drainage system in which water exits the ice sheet as a point source, mixes with cavity water and incises upwards into a corrugation peak, accentuating the corrugation downstream. Hard-bedded landforms influence both subglacial hydrology and ice-shelf structure and, as they are known to be widespread on formerly glaciated terrain, their influence on the ice-sheet-shelf transition could be more widespread than thought previously. |
format |
Article in Journal/Newspaper |
author |
Jeofry, Hafeez Ross, Neil Le Brocq, Anne Graham, Alastair GC Li, Jilu Gogineni, Prasad Morlighem, Mathieu Jordan, Thomas Siegert, Martin J |
author_facet |
Jeofry, Hafeez Ross, Neil Le Brocq, Anne Graham, Alastair GC Li, Jilu Gogineni, Prasad Morlighem, Mathieu Jordan, Thomas Siegert, Martin J |
author_sort |
Jeofry, Hafeez |
title |
Hard rock landforms generate 130 km ice shelf channels through water focusing in basal corrugations. |
title_short |
Hard rock landforms generate 130 km ice shelf channels through water focusing in basal corrugations. |
title_full |
Hard rock landforms generate 130 km ice shelf channels through water focusing in basal corrugations. |
title_fullStr |
Hard rock landforms generate 130 km ice shelf channels through water focusing in basal corrugations. |
title_full_unstemmed |
Hard rock landforms generate 130 km ice shelf channels through water focusing in basal corrugations. |
title_sort |
hard rock landforms generate 130 km ice shelf channels through water focusing in basal corrugations. |
publisher |
eScholarship, University of California |
publishDate |
2018 |
url |
http://www.escholarship.org/uc/item/3572t71b |
op_coverage |
4576 |
long_lat |
ENVELOPE(-60.000,-60.000,-83.250,-83.250) |
geographic |
Foundation Ice Stream |
geographic_facet |
Foundation Ice Stream |
genre |
Foundation Ice Stream Ice Sheet Ice Shelf |
genre_facet |
Foundation Ice Stream Ice Sheet Ice Shelf |
op_source |
Jeofry, Hafeez; Ross, Neil; Le Brocq, Anne; Graham, Alastair GC; Li, Jilu; Gogineni, Prasad; et al.(2018). Hard rock landforms generate 130 km ice shelf channels through water focusing in basal corrugations. Nature communications, 9(1), 4576. doi:10.1038/s41467-018-06679-z. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/3572t71b |
op_relation |
qt3572t71b http://www.escholarship.org/uc/item/3572t71b |
op_rights |
Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41467-018-06679-z |
container_title |
Nature Communications |
container_volume |
9 |
container_issue |
1 |
_version_ |
1766003986654035968 |