Fibre-optic borehole observations and numerical modelling of complex ice-sheet thermodynamics ...
Predictions of ice-sheet mass loss, and therefore predictions of global sea level rise, depend sensitively upon how ice-sheet motion is incorporated into numerical models. Using field observations and numerical modelling, this thesis demonstrates that two frequently overlooked processes are central...
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ftdatacite:10.17863/cam.90692 2024-02-04T09:56:04+01:00 Fibre-optic borehole observations and numerical modelling of complex ice-sheet thermodynamics ... Law, Robert 2022 https://dx.doi.org/10.17863/cam.90692 https://www.repository.cam.ac.uk/handle/1810/343281 en eng Apollo - University of Cambridge Repository https://dx.doi.org/10.17863/cam.65812 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 Antarctic Ice Sheet Fibre-optics Finite Element Modelling Glacier borehole Glacier fieldwork Glaciology Greenland Ice Sheet Dissertation Thesis thesis 2022 ftdatacite https://doi.org/10.17863/cam.9069210.17863/cam.65812 2024-01-05T09:50:49Z Predictions of ice-sheet mass loss, and therefore predictions of global sea level rise, depend sensitively upon how ice-sheet motion is incorporated into numerical models. Using field observations and numerical modelling, this thesis demonstrates that two frequently overlooked processes are central to describing borehole observations of fast ice-sheet motion --- intermediate-scale (<25 m, ⪅2 km) interaction of ice motion with realistic or real bed topography, and modulation of these ice-motion patterns through a basal layer of temperate ice (much softer ice at the pressure-melting point). I first present a fibre-optic data set from a 1,043 m deep borehole drilled to the base of the fast-moving (>500 m a‾¹) marine-terminating Sermeq Kujalleq (Store Glacier) at the western margin of the Greenland Ice Sheet. This reveals hitherto unappreciated complexity in the processes behind fast ice-sheet motion. I observe substantial but isolated strain heating ~220 m beneath the surface within stiffer ... Thesis Antarc* Antarctic glacier Greenland Ice Sheet Kujalleq Sermeq Kujalleq DataCite Metadata Store (German National Library of Science and Technology) Antarctic Greenland Kujalleq ENVELOPE(-46.037,-46.037,60.719,60.719) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Antarctic Ice Sheet Fibre-optics Finite Element Modelling Glacier borehole Glacier fieldwork Glaciology Greenland Ice Sheet |
spellingShingle |
Antarctic Ice Sheet Fibre-optics Finite Element Modelling Glacier borehole Glacier fieldwork Glaciology Greenland Ice Sheet Law, Robert Fibre-optic borehole observations and numerical modelling of complex ice-sheet thermodynamics ... |
topic_facet |
Antarctic Ice Sheet Fibre-optics Finite Element Modelling Glacier borehole Glacier fieldwork Glaciology Greenland Ice Sheet |
description |
Predictions of ice-sheet mass loss, and therefore predictions of global sea level rise, depend sensitively upon how ice-sheet motion is incorporated into numerical models. Using field observations and numerical modelling, this thesis demonstrates that two frequently overlooked processes are central to describing borehole observations of fast ice-sheet motion --- intermediate-scale (<25 m, ⪅2 km) interaction of ice motion with realistic or real bed topography, and modulation of these ice-motion patterns through a basal layer of temperate ice (much softer ice at the pressure-melting point). I first present a fibre-optic data set from a 1,043 m deep borehole drilled to the base of the fast-moving (>500 m a‾¹) marine-terminating Sermeq Kujalleq (Store Glacier) at the western margin of the Greenland Ice Sheet. This reveals hitherto unappreciated complexity in the processes behind fast ice-sheet motion. I observe substantial but isolated strain heating ~220 m beneath the surface within stiffer ... |
format |
Thesis |
author |
Law, Robert |
author_facet |
Law, Robert |
author_sort |
Law, Robert |
title |
Fibre-optic borehole observations and numerical modelling of complex ice-sheet thermodynamics ... |
title_short |
Fibre-optic borehole observations and numerical modelling of complex ice-sheet thermodynamics ... |
title_full |
Fibre-optic borehole observations and numerical modelling of complex ice-sheet thermodynamics ... |
title_fullStr |
Fibre-optic borehole observations and numerical modelling of complex ice-sheet thermodynamics ... |
title_full_unstemmed |
Fibre-optic borehole observations and numerical modelling of complex ice-sheet thermodynamics ... |
title_sort |
fibre-optic borehole observations and numerical modelling of complex ice-sheet thermodynamics ... |
publisher |
Apollo - University of Cambridge Repository |
publishDate |
2022 |
url |
https://dx.doi.org/10.17863/cam.90692 https://www.repository.cam.ac.uk/handle/1810/343281 |
long_lat |
ENVELOPE(-46.037,-46.037,60.719,60.719) |
geographic |
Antarctic Greenland Kujalleq |
geographic_facet |
Antarctic Greenland Kujalleq |
genre |
Antarc* Antarctic glacier Greenland Ice Sheet Kujalleq Sermeq Kujalleq |
genre_facet |
Antarc* Antarctic glacier Greenland Ice Sheet Kujalleq Sermeq Kujalleq |
op_relation |
https://dx.doi.org/10.17863/cam.65812 |
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.9069210.17863/cam.65812 |
_version_ |
1789960443241955328 |