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...
Main Authors: | , , , , , , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
American Association for the Advancement of Science (AAAS)
2021
|
Subjects: | |
Online Access: | https://eprints.whiterose.ac.uk/174201/ https://eprints.whiterose.ac.uk/174201/3/eabe7136.full.pdf |
id |
ftleedsuniv:oai:eprints.whiterose.ac.uk:174201 |
---|---|
record_format |
openpolar |
spelling |
ftleedsuniv:oai:eprints.whiterose.ac.uk:174201 2023-05-15T16:20:59+02:00 Thermodynamics of a fast-moving Greenlandic outlet glacier revealed by fiber-optic distributed temperature sensing Law, R Christoffersen, P Hubbard, B Doyle, SH Chudley, TR Schoonman, CM Bougamont, M des Tombe, B Schilperoort, B Kechavarzi, C Booth, A Young, TJ 2021-05-14 text https://eprints.whiterose.ac.uk/174201/ https://eprints.whiterose.ac.uk/174201/3/eabe7136.full.pdf en eng American Association for the Advancement of Science (AAAS) https://eprints.whiterose.ac.uk/174201/3/eabe7136.full.pdf Law, R, Christoffersen, P, Hubbard, B et al. (9 more authors) (2021) Thermodynamics of a fast-moving Greenlandic outlet glacier revealed by fiber-optic distributed temperature sensing. Science Advances, 7 (20). eabe7136. ISSN 2375-2548 cc_by_nc_4 CC-BY-NC Article NonPeerReviewed 2021 ftleedsuniv 2023-01-30T22:38:37Z 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 White Rose Research Online (Universities of Leeds, Sheffield & York) Greenland Kujalleq ENVELOPE(-46.037,-46.037,60.719,60.719) |
institution |
Open Polar |
collection |
White Rose Research Online (Universities of Leeds, Sheffield & York) |
op_collection_id |
ftleedsuniv |
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, R Christoffersen, P Hubbard, B Doyle, SH Chudley, TR Schoonman, CM Bougamont, M des Tombe, B Schilperoort, B Kechavarzi, C Booth, A Young, TJ |
spellingShingle |
Law, R Christoffersen, P Hubbard, B Doyle, SH Chudley, TR Schoonman, CM Bougamont, M des Tombe, B Schilperoort, B Kechavarzi, C Booth, A Young, TJ Thermodynamics of a fast-moving Greenlandic outlet glacier revealed by fiber-optic distributed temperature sensing |
author_facet |
Law, R Christoffersen, P Hubbard, B Doyle, SH Chudley, TR Schoonman, CM Bougamont, M des Tombe, B Schilperoort, B Kechavarzi, C Booth, A Young, TJ |
author_sort |
Law, R |
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://eprints.whiterose.ac.uk/174201/ https://eprints.whiterose.ac.uk/174201/3/eabe7136.full.pdf |
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://eprints.whiterose.ac.uk/174201/3/eabe7136.full.pdf Law, R, Christoffersen, P, Hubbard, B et al. (9 more authors) (2021) Thermodynamics of a fast-moving Greenlandic outlet glacier revealed by fiber-optic distributed temperature sensing. Science Advances, 7 (20). eabe7136. ISSN 2375-2548 |
op_rights |
cc_by_nc_4 |
op_rightsnorm |
CC-BY-NC |
_version_ |
1766009000512454656 |