Organization of ice flow by localized regions of elevated geothermal heat flux
The impact of localized regions of elevated geothermal heat flux on ice sheet dynamics is largely unknown. Simulations of ice dynamics are produced using poorly resolved and low-resolution estimates of geothermal heat flux. Observations of crustal heat production within the continental crust underne...
Published in: | Geophysical Research Letters |
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Online Access: | https://doi.org/10.1002/2016GL068436 http://ecite.utas.edu.au/114790 |
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ftunivtasecite:oai:ecite.utas.edu.au:114790 2023-05-15T13:49:03+02:00 Organization of ice flow by localized regions of elevated geothermal heat flux Pittard, ML Galton-Fenzi, BK Roberts, JL Watson, CS 2016 application/pdf https://doi.org/10.1002/2016GL068436 http://ecite.utas.edu.au/114790 en eng Amer Geophysical Union http://ecite.utas.edu.au/114790/1/114790 final.pdf http://dx.doi.org/10.1002/2016GL068436 Pittard, ML and Galton-Fenzi, BK and Roberts, JL and Watson, CS, Organization of ice flow by localized regions of elevated geothermal heat flux, Geophysical Research Letters, 43, (7) pp. 3342-3350. ISSN 0094-8276 (2016) [Refereed Article] http://ecite.utas.edu.au/114790 Earth Sciences Physical Geography and Environmental Geoscience Glaciology Refereed Article PeerReviewed 2016 ftunivtasecite https://doi.org/10.1002/2016GL068436 2019-12-13T22:14:37Z The impact of localized regions of elevated geothermal heat flux on ice sheet dynamics is largely unknown. Simulations of ice dynamics are produced using poorly resolved and low-resolution estimates of geothermal heat flux. Observations of crustal heat production within the continental crust underneath the Lambert-Amery glacial system in East Antarctica indicate that high heat flux regions of at least 120mWm −2 exist. Here we investigate the influence of simulated but plausible, localized regions of elevated geothermal heat flux on ice dynamics using a numerical ice sheet model of the Lambert-Amery glacial system. We find that high heat flux regions have a significant effect across areas of slow-moving ice with the influence extending both upstream and downstream of the geothermal anomaly, while fast-moving ice is relatively unaffected. Our results suggest that localized regions of elevated geothermal heat flux may play an important role in the organization of ice sheet flow. Article in Journal/Newspaper Antarc* Antarctica East Antarctica Ice Sheet eCite UTAS (University of Tasmania) Amery ENVELOPE(-94.063,-94.063,56.565,56.565) East Antarctica Geophysical Research Letters 43 7 3342 3350 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology |
spellingShingle |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology Pittard, ML Galton-Fenzi, BK Roberts, JL Watson, CS Organization of ice flow by localized regions of elevated geothermal heat flux |
topic_facet |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology |
description |
The impact of localized regions of elevated geothermal heat flux on ice sheet dynamics is largely unknown. Simulations of ice dynamics are produced using poorly resolved and low-resolution estimates of geothermal heat flux. Observations of crustal heat production within the continental crust underneath the Lambert-Amery glacial system in East Antarctica indicate that high heat flux regions of at least 120mWm −2 exist. Here we investigate the influence of simulated but plausible, localized regions of elevated geothermal heat flux on ice dynamics using a numerical ice sheet model of the Lambert-Amery glacial system. We find that high heat flux regions have a significant effect across areas of slow-moving ice with the influence extending both upstream and downstream of the geothermal anomaly, while fast-moving ice is relatively unaffected. Our results suggest that localized regions of elevated geothermal heat flux may play an important role in the organization of ice sheet flow. |
format |
Article in Journal/Newspaper |
author |
Pittard, ML Galton-Fenzi, BK Roberts, JL Watson, CS |
author_facet |
Pittard, ML Galton-Fenzi, BK Roberts, JL Watson, CS |
author_sort |
Pittard, ML |
title |
Organization of ice flow by localized regions of elevated geothermal heat flux |
title_short |
Organization of ice flow by localized regions of elevated geothermal heat flux |
title_full |
Organization of ice flow by localized regions of elevated geothermal heat flux |
title_fullStr |
Organization of ice flow by localized regions of elevated geothermal heat flux |
title_full_unstemmed |
Organization of ice flow by localized regions of elevated geothermal heat flux |
title_sort |
organization of ice flow by localized regions of elevated geothermal heat flux |
publisher |
Amer Geophysical Union |
publishDate |
2016 |
url |
https://doi.org/10.1002/2016GL068436 http://ecite.utas.edu.au/114790 |
long_lat |
ENVELOPE(-94.063,-94.063,56.565,56.565) |
geographic |
Amery East Antarctica |
geographic_facet |
Amery East Antarctica |
genre |
Antarc* Antarctica East Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctica East Antarctica Ice Sheet |
op_relation |
http://ecite.utas.edu.au/114790/1/114790 final.pdf http://dx.doi.org/10.1002/2016GL068436 Pittard, ML and Galton-Fenzi, BK and Roberts, JL and Watson, CS, Organization of ice flow by localized regions of elevated geothermal heat flux, Geophysical Research Letters, 43, (7) pp. 3342-3350. ISSN 0094-8276 (2016) [Refereed Article] http://ecite.utas.edu.au/114790 |
op_doi |
https://doi.org/10.1002/2016GL068436 |
container_title |
Geophysical Research Letters |
container_volume |
43 |
container_issue |
7 |
container_start_page |
3342 |
op_container_end_page |
3350 |
_version_ |
1766250689652064256 |