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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ftpubmed:oai:pubmedcentral.nih.gov:8121432 2023-05-15T16:20:59+02:00 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 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8121432/ http://www.ncbi.nlm.nih.gov/pubmed/33990322 https://doi.org/10.1126/sciadv.abe7136 en eng American Association for the Advancement of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8121432/ http://www.ncbi.nlm.nih.gov/pubmed/33990322 http://dx.doi.org/10.1126/sciadv.abe7136 Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. CC-BY-NC Sci Adv Research Articles Text 2021 ftpubmed https://doi.org/10.1126/sciadv.abe7136 2021-05-23T00:33:29Z 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. Text glacier Greenland greenlandic Kujalleq Sermeq Kujalleq PubMed Central (PMC) Greenland Kujalleq ENVELOPE(-46.037,-46.037,60.719,60.719) Science Advances 7 20 eabe7136 |
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Research Articles |
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Research Articles 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 |
Research Articles |
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 |
Text |
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 |
publishDate |
2021 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8121432/ http://www.ncbi.nlm.nih.gov/pubmed/33990322 https://doi.org/10.1126/sciadv.abe7136 |
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_source |
Sci Adv |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8121432/ http://www.ncbi.nlm.nih.gov/pubmed/33990322 http://dx.doi.org/10.1126/sciadv.abe7136 |
op_rights |
Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
op_rightsnorm |
CC-BY-NC |
op_doi |
https://doi.org/10.1126/sciadv.abe7136 |
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Science Advances |
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7 |
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20 |
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