Thermodynamics of a fast-moving Greenlandic outlet glacier revealed by fiber-optic distributed temperature sensing.
Measurements of ice temperature provide crucial constraints on ice viscosity and the thermodynamic processes occurring within a glacier. However, such measurements are presently limited by a small number of relatively coarse-spatial-resolution borehole records, especially for ice sheets. Here, we ad...
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ftunivcam:oai:www.repository.cam.ac.uk:1810/322796 2024-02-04T10:00:34+01:00 Thermodynamics of a fast-moving Greenlandic outlet glacier revealed by fiber-optic distributed temperature sensing. Law, Robert Christoffersen, Poul Hubbard, Bryn Doyle, Samuel H Chudley, Thomas R Schoonman, Charlotte M Bougamont, Marion des Tombe, Bas Schilperoort, Bart Kechavarzi, Cedric Booth, Adam Young, Tun Jan 2021-05 Electronic-Print application/pdf https://www.repository.cam.ac.uk/handle/1810/322796 https://doi.org/10.17863/CAM.70252 eng eng American Association for the Advancement of Science (AAAS) http://dx.doi.org/10.1126/sciadv.abe7136 Sci Adv https://doi.org/10.17863/CAM.65812 https://www.repository.cam.ac.uk/handle/1810/322796 doi:10.17863/CAM.70252 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ 37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology Article 2021 ftunivcam https://doi.org/10.17863/CAM.7025210.17863/CAM.65812 2024-01-11T23:27:55Z Measurements of ice temperature provide crucial constraints on ice viscosity and the thermodynamic processes occurring within a glacier. However, such measurements are presently limited by a small number of relatively coarse-spatial-resolution borehole records, especially for ice sheets. Here, we advance our understanding of glacier thermodynamics with an exceptionally high-vertical-resolution (~0.65 m), distributed-fiber-optic temperature-sensing profile from a 1043-m borehole drilled to the base of Sermeq Kujalleq (Store Glacier), Greenland. We report substantial but isolated strain heating within interglacial-phase ice at 208 to 242 m depth together with strongly heterogeneous ice deformation in glacial-phase ice below 889 m. We also observe a high-strain interface between glacial- and interglacial-phase ice and a 73-m-thick temperate basal layer, interpreted as locally formed and important for the glacier's fast motion. These findings demonstrate notable spatial heterogeneity, both vertically and at the catchment scale, in the conditions facilitating the fast motion of marine-terminating glaciers in Greenland. European Union's Horizon 2020 (Grant 683043) Article in Journal/Newspaper glacier Greenland greenlandic Kujalleq Sermeq Kujalleq Apollo - University of Cambridge Repository Greenland Kujalleq ENVELOPE(-46.037,-46.037,60.719,60.719) |
institution |
Open Polar |
collection |
Apollo - University of Cambridge Repository |
op_collection_id |
ftunivcam |
language |
English |
topic |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology |
spellingShingle |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology Law, Robert Christoffersen, Poul Hubbard, Bryn Doyle, Samuel H Chudley, Thomas R Schoonman, Charlotte M Bougamont, Marion des Tombe, Bas Schilperoort, Bart Kechavarzi, Cedric Booth, Adam Young, Tun Jan Thermodynamics of a fast-moving Greenlandic outlet glacier revealed by fiber-optic distributed temperature sensing. |
topic_facet |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology |
description |
Measurements of ice temperature provide crucial constraints on ice viscosity and the thermodynamic processes occurring within a glacier. However, such measurements are presently limited by a small number of relatively coarse-spatial-resolution borehole records, especially for ice sheets. Here, we advance our understanding of glacier thermodynamics with an exceptionally high-vertical-resolution (~0.65 m), distributed-fiber-optic temperature-sensing profile from a 1043-m borehole drilled to the base of Sermeq Kujalleq (Store Glacier), Greenland. We report substantial but isolated strain heating within interglacial-phase ice at 208 to 242 m depth together with strongly heterogeneous ice deformation in glacial-phase ice below 889 m. We also observe a high-strain interface between glacial- and interglacial-phase ice and a 73-m-thick temperate basal layer, interpreted as locally formed and important for the glacier's fast motion. These findings demonstrate notable spatial heterogeneity, both vertically and at the catchment scale, in the conditions facilitating the fast motion of marine-terminating glaciers in Greenland. European Union's Horizon 2020 (Grant 683043) |
format |
Article in Journal/Newspaper |
author |
Law, Robert Christoffersen, Poul Hubbard, Bryn Doyle, Samuel H Chudley, Thomas R Schoonman, Charlotte M Bougamont, Marion des Tombe, Bas Schilperoort, Bart Kechavarzi, Cedric Booth, Adam Young, Tun Jan |
author_facet |
Law, Robert Christoffersen, Poul Hubbard, Bryn Doyle, Samuel H Chudley, Thomas R Schoonman, Charlotte M Bougamont, Marion des Tombe, Bas Schilperoort, Bart Kechavarzi, Cedric Booth, Adam Young, Tun Jan |
author_sort |
Law, Robert |
title |
Thermodynamics of a fast-moving Greenlandic outlet glacier revealed by fiber-optic distributed temperature sensing. |
title_short |
Thermodynamics of a fast-moving Greenlandic outlet glacier revealed by fiber-optic distributed temperature sensing. |
title_full |
Thermodynamics of a fast-moving Greenlandic outlet glacier revealed by fiber-optic distributed temperature sensing. |
title_fullStr |
Thermodynamics of a fast-moving Greenlandic outlet glacier revealed by fiber-optic distributed temperature sensing. |
title_full_unstemmed |
Thermodynamics of a fast-moving Greenlandic outlet glacier revealed by fiber-optic distributed temperature sensing. |
title_sort |
thermodynamics of a fast-moving greenlandic outlet glacier revealed by fiber-optic distributed temperature sensing. |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2021 |
url |
https://www.repository.cam.ac.uk/handle/1810/322796 https://doi.org/10.17863/CAM.70252 |
long_lat |
ENVELOPE(-46.037,-46.037,60.719,60.719) |
geographic |
Greenland Kujalleq |
geographic_facet |
Greenland Kujalleq |
genre |
glacier Greenland greenlandic Kujalleq Sermeq Kujalleq |
genre_facet |
glacier Greenland greenlandic Kujalleq Sermeq Kujalleq |
op_relation |
https://doi.org/10.17863/CAM.65812 https://www.repository.cam.ac.uk/handle/1810/322796 doi:10.17863/CAM.70252 |
op_rights |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.17863/CAM.7025210.17863/CAM.65812 |
_version_ |
1789965921130905600 |