Complex motion of Greenland Ice Sheet outlet glaciers with basal temperate ice ...
Uncertainty associated with ice-sheet motion plagues sea-level rise predictions. Much of this uncertainty arises from imperfect representations of physical processes including basal slip and internal ice deformation, with ice-sheet models largely incapable of reproducing borehole-based observations....
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American Association for the Advancement of Science
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ftdatacite:10.17863/cam.94849 2024-02-27T08:40:44+00:00 Complex motion of Greenland Ice Sheet outlet glaciers with basal temperate ice ... Law, Robert Christoffersen, Poul MacKie, Emma Cook, Samuel Haseloff, Marianne Gagliardini, Olivier 2023 https://dx.doi.org/10.17863/cam.94849 https://www.repository.cam.ac.uk/handle/1810/347435 en eng American Association for the Advancement of Science 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 37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 13 Climate Action article-journal ScholarlyArticle JournalArticle Article 2023 ftdatacite https://doi.org/10.17863/cam.94849 2024-02-01T15:02:53Z Uncertainty associated with ice-sheet motion plagues sea-level rise predictions. Much of this uncertainty arises from imperfect representations of physical processes including basal slip and internal ice deformation, with ice-sheet models largely incapable of reproducing borehole-based observations. Here, we model isolated 3D domains from fast-moving (Sermeq Kujalleq/Store Glacier) and slow-moving (Isunnguata Sermia) ice-sheet settings in Greenland. By incorporating realistic geostatistically simulated topography, we show that a spatially highly variable layer of temperate ice (much softer ice at the pressure-melting point) forms naturally in both settings, alongside ice-motion patterns which diverge substantially from those obtained using smoothly varying BedMachine topography. Temperate ice is vertically extensive (>100 m) in deep troughs, but thins notably (<5 m) over bedrock highs, with basal-slip rates reaching >90% or <5% of surface velocity dependent on topography and temperate-layer ... Article in Journal/Newspaper glacier Greenland Ice Sheet Kujalleq Sermeq Kujalleq DataCite Metadata Store (German National Library of Science and Technology) Greenland Isunnguata Sermia ENVELOPE(-50.167,-50.167,67.183,67.183) Kujalleq ENVELOPE(-46.037,-46.037,60.719,60.719) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
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ftdatacite |
language |
English |
topic |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 13 Climate Action |
spellingShingle |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 13 Climate Action Law, Robert Christoffersen, Poul MacKie, Emma Cook, Samuel Haseloff, Marianne Gagliardini, Olivier Complex motion of Greenland Ice Sheet outlet glaciers with basal temperate ice ... |
topic_facet |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 13 Climate Action |
description |
Uncertainty associated with ice-sheet motion plagues sea-level rise predictions. Much of this uncertainty arises from imperfect representations of physical processes including basal slip and internal ice deformation, with ice-sheet models largely incapable of reproducing borehole-based observations. Here, we model isolated 3D domains from fast-moving (Sermeq Kujalleq/Store Glacier) and slow-moving (Isunnguata Sermia) ice-sheet settings in Greenland. By incorporating realistic geostatistically simulated topography, we show that a spatially highly variable layer of temperate ice (much softer ice at the pressure-melting point) forms naturally in both settings, alongside ice-motion patterns which diverge substantially from those obtained using smoothly varying BedMachine topography. Temperate ice is vertically extensive (>100 m) in deep troughs, but thins notably (<5 m) over bedrock highs, with basal-slip rates reaching >90% or <5% of surface velocity dependent on topography and temperate-layer ... |
format |
Article in Journal/Newspaper |
author |
Law, Robert Christoffersen, Poul MacKie, Emma Cook, Samuel Haseloff, Marianne Gagliardini, Olivier |
author_facet |
Law, Robert Christoffersen, Poul MacKie, Emma Cook, Samuel Haseloff, Marianne Gagliardini, Olivier |
author_sort |
Law, Robert |
title |
Complex motion of Greenland Ice Sheet outlet glaciers with basal temperate ice ... |
title_short |
Complex motion of Greenland Ice Sheet outlet glaciers with basal temperate ice ... |
title_full |
Complex motion of Greenland Ice Sheet outlet glaciers with basal temperate ice ... |
title_fullStr |
Complex motion of Greenland Ice Sheet outlet glaciers with basal temperate ice ... |
title_full_unstemmed |
Complex motion of Greenland Ice Sheet outlet glaciers with basal temperate ice ... |
title_sort |
complex motion of greenland ice sheet outlet glaciers with basal temperate ice ... |
publisher |
American Association for the Advancement of Science |
publishDate |
2023 |
url |
https://dx.doi.org/10.17863/cam.94849 https://www.repository.cam.ac.uk/handle/1810/347435 |
long_lat |
ENVELOPE(-50.167,-50.167,67.183,67.183) ENVELOPE(-46.037,-46.037,60.719,60.719) |
geographic |
Greenland Isunnguata Sermia Kujalleq |
geographic_facet |
Greenland Isunnguata Sermia Kujalleq |
genre |
glacier Greenland Ice Sheet Kujalleq Sermeq Kujalleq |
genre_facet |
glacier Greenland Ice Sheet Kujalleq Sermeq Kujalleq |
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.94849 |
_version_ |
1792047876482793472 |