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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ftpubmed:oai:pubmedcentral.nih.gov:6212400 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 G.C. Li, Jilu Gogineni, Prasad Morlighem, Mathieu Jordan, Thomas Siegert, Martin J. 2018-11-01 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6212400/ http://www.ncbi.nlm.nih.gov/pubmed/30385741 https://doi.org/10.1038/s41467-018-06679-z en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6212400/ http://www.ncbi.nlm.nih.gov/pubmed/30385741 http://dx.doi.org/10.1038/s41467-018-06679-z © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. CC-BY Article Text 2018 ftpubmed https://doi.org/10.1038/s41467-018-06679-z 2018-11-11T01:22:44Z 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. Text Foundation Ice Stream Ice Sheet Ice Shelf PubMed Central (PMC) Foundation Ice Stream ENVELOPE(-60.000,-60.000,-83.250,-83.250) Nature Communications 9 1 |
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Article Jeofry, Hafeez Ross, Neil Le Brocq, Anne Graham, Alastair G.C. 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 |
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Article |
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 |
Text |
author |
Jeofry, Hafeez Ross, Neil Le Brocq, Anne Graham, Alastair G.C. Li, Jilu Gogineni, Prasad Morlighem, Mathieu Jordan, Thomas Siegert, Martin J. |
author_facet |
Jeofry, Hafeez Ross, Neil Le Brocq, Anne Graham, Alastair G.C. 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 |
Nature Publishing Group UK |
publishDate |
2018 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6212400/ http://www.ncbi.nlm.nih.gov/pubmed/30385741 https://doi.org/10.1038/s41467-018-06679-z |
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_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6212400/ http://www.ncbi.nlm.nih.gov/pubmed/30385741 http://dx.doi.org/10.1038/s41467-018-06679-z |
op_rights |
© The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41467-018-06679-z |
container_title |
Nature Communications |
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9 |
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1 |
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1766003986052153344 |