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...
Published in: | Nature Communications |
---|---|
Main Authors: | , , , , , , , , |
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Nature Publishing Group
2018
|
Subjects: | |
Online Access: | http://hdl.handle.net/10044/1/64959 https://doi.org/10.1038/s41467-018-06679-z |
id |
ftimperialcol:oai:spiral.imperial.ac.uk:10044/1/64959 |
---|---|
record_format |
openpolar |
spelling |
ftimperialcol:oai:spiral.imperial.ac.uk:10044/1/64959 2023-05-15T14:02:50+02:00 Hard rock landforms generate 130 km ice shelf channels through water focusing in basal corrugations Jeofry, H Ross, N Le Brocq, A Graham, A Li, J Gogineni, P Morlighem, M Jordan, T Siegert, MJ Natural Environment Research Council (NERC) British Council (UK) 2018-09-19 http://hdl.handle.net/10044/1/64959 https://doi.org/10.1038/s41467-018-06679-z unknown Nature Publishing Group Nature Communications © 2018 The Author(s). 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 Science & Technology Multidisciplinary Sciences Science & Technology - Other Topics WEDDELL SEA SECTOR WEST ANTARCTICA SUBGLACIAL BEDFORMS STREAMLINED HARD GROUNDING LINE SHEET BED BENEATH MODEL ZONE MD Multidisciplinary Journal Article 2018 ftimperialcol https://doi.org/10.1038/s41467-018-06679-z 2018-12-20T23:39:40Z 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 Antarc* Antarctica Foundation Ice Stream Ice Sheet Ice Shelf Weddell Sea West Antarctica Imperial College London: Spiral Weddell Sea West Antarctica Weddell Foundation Ice Stream ENVELOPE(-60.000,-60.000,-83.250,-83.250) Nature Communications 9 1 |
institution |
Open Polar |
collection |
Imperial College London: Spiral |
op_collection_id |
ftimperialcol |
language |
unknown |
topic |
Science & Technology Multidisciplinary Sciences Science & Technology - Other Topics WEDDELL SEA SECTOR WEST ANTARCTICA SUBGLACIAL BEDFORMS STREAMLINED HARD GROUNDING LINE SHEET BED BENEATH MODEL ZONE MD Multidisciplinary |
spellingShingle |
Science & Technology Multidisciplinary Sciences Science & Technology - Other Topics WEDDELL SEA SECTOR WEST ANTARCTICA SUBGLACIAL BEDFORMS STREAMLINED HARD GROUNDING LINE SHEET BED BENEATH MODEL ZONE MD Multidisciplinary Jeofry, H Ross, N Le Brocq, A Graham, A Li, J Gogineni, P Morlighem, M Jordan, T Siegert, MJ Hard rock landforms generate 130 km ice shelf channels through water focusing in basal corrugations |
topic_facet |
Science & Technology Multidisciplinary Sciences Science & Technology - Other Topics WEDDELL SEA SECTOR WEST ANTARCTICA SUBGLACIAL BEDFORMS STREAMLINED HARD GROUNDING LINE SHEET BED BENEATH MODEL ZONE 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. |
author2 |
Natural Environment Research Council (NERC) British Council (UK) |
format |
Article in Journal/Newspaper |
author |
Jeofry, H Ross, N Le Brocq, A Graham, A Li, J Gogineni, P Morlighem, M Jordan, T Siegert, MJ |
author_facet |
Jeofry, H Ross, N Le Brocq, A Graham, A Li, J Gogineni, P Morlighem, M Jordan, T Siegert, MJ |
author_sort |
Jeofry, H |
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 |
publishDate |
2018 |
url |
http://hdl.handle.net/10044/1/64959 https://doi.org/10.1038/s41467-018-06679-z |
long_lat |
ENVELOPE(-60.000,-60.000,-83.250,-83.250) |
geographic |
Weddell Sea West Antarctica Weddell Foundation Ice Stream |
geographic_facet |
Weddell Sea West Antarctica Weddell Foundation Ice Stream |
genre |
Antarc* Antarctica Foundation Ice Stream Ice Sheet Ice Shelf Weddell Sea West Antarctica |
genre_facet |
Antarc* Antarctica Foundation Ice Stream Ice Sheet Ice Shelf Weddell Sea West Antarctica |
op_relation |
Nature Communications |
op_rights |
© 2018 The Author(s). 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 |
container_volume |
9 |
container_issue |
1 |
_version_ |
1766273235676037120 |