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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2021
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Online Access: | https://research-portal.st-andrews.ac.uk/en/researchoutput/thermodynamics-of-a-fastmoving-greenlandic-outlet-glacier-revealed-by-fiberoptic-distributed-temperature-sensing(1877d739-28c3-4205-8141-9f5962ce7797).html https://doi.org/10.1126/sciadv.abe7136 https://research-repository.st-andrews.ac.uk/bitstream/10023/27372/1/Law_2023_SA_Thermodynamics_glacier_CC.pdf |
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ftunstandrewcris:oai:research-portal.st-andrews.ac.uk:publications/1877d739-28c3-4205-8141-9f5962ce7797 2024-09-15T18:07:38+00:00 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 2021-05-14 application/pdf https://research-portal.st-andrews.ac.uk/en/researchoutput/thermodynamics-of-a-fastmoving-greenlandic-outlet-glacier-revealed-by-fiberoptic-distributed-temperature-sensing(1877d739-28c3-4205-8141-9f5962ce7797).html https://doi.org/10.1126/sciadv.abe7136 https://research-repository.st-andrews.ac.uk/bitstream/10023/27372/1/Law_2023_SA_Thermodynamics_glacier_CC.pdf eng eng https://research-portal.st-andrews.ac.uk/en/researchoutput/thermodynamics-of-a-fastmoving-greenlandic-outlet-glacier-revealed-by-fiberoptic-distributed-temperature-sensing(1877d739-28c3-4205-8141-9f5962ce7797).html info:eu-repo/semantics/openAccess Law , R , Christoffersen , P , Hubbard , B , Doyle , S H , Chudley , T R , Schoonman , C M , Bougamont , M , des Tombe , B , Schilperoort , B , Kechavarzi , C , Booth , A & Young , T J 2021 , ' Thermodynamics of a fast-moving Greenlandic outlet glacier revealed by fiber-optic distributed temperature sensing ' , Science Advances , vol. 7 , no. 20 , eabe7136 . https://doi.org/10.1126/sciadv.abe7136 article 2021 ftunstandrewcris https://doi.org/10.1126/sciadv.abe7136 2024-08-14T23:40:03Z 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. Article in Journal/Newspaper glacier Greenland greenlandic Kujalleq Sermeq Kujalleq University of St Andrews: Research Portal Science Advances 7 20 |
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Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
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. |
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 |
spellingShingle |
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 |
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 |
publishDate |
2021 |
url |
https://research-portal.st-andrews.ac.uk/en/researchoutput/thermodynamics-of-a-fastmoving-greenlandic-outlet-glacier-revealed-by-fiberoptic-distributed-temperature-sensing(1877d739-28c3-4205-8141-9f5962ce7797).html https://doi.org/10.1126/sciadv.abe7136 https://research-repository.st-andrews.ac.uk/bitstream/10023/27372/1/Law_2023_SA_Thermodynamics_glacier_CC.pdf |
genre |
glacier Greenland greenlandic Kujalleq Sermeq Kujalleq |
genre_facet |
glacier Greenland greenlandic Kujalleq Sermeq Kujalleq |
op_source |
Law , R , Christoffersen , P , Hubbard , B , Doyle , S H , Chudley , T R , Schoonman , C M , Bougamont , M , des Tombe , B , Schilperoort , B , Kechavarzi , C , Booth , A & Young , T J 2021 , ' Thermodynamics of a fast-moving Greenlandic outlet glacier revealed by fiber-optic distributed temperature sensing ' , Science Advances , vol. 7 , no. 20 , eabe7136 . https://doi.org/10.1126/sciadv.abe7136 |
op_relation |
https://research-portal.st-andrews.ac.uk/en/researchoutput/thermodynamics-of-a-fastmoving-greenlandic-outlet-glacier-revealed-by-fiberoptic-distributed-temperature-sensing(1877d739-28c3-4205-8141-9f5962ce7797).html |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1126/sciadv.abe7136 |
container_title |
Science Advances |
container_volume |
7 |
container_issue |
20 |
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1810445020738617344 |