Calving on tidewater glaciers amplified by submarine frontal melting ...
While it has been shown repeatedly that ocean conditions exhibit an important control on the behaviour of grounded tidewater glaciers, modelling studies have focused largely on the effects of basal and surface melting. Here, a finite-element model of stresses near the front of a tidewater glacier is...
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Online Access: | https://dx.doi.org/10.17863/cam.45338 https://www.repository.cam.ac.uk/handle/1810/298283 |
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ftdatacite:10.17863/cam.45338 2024-02-04T09:55:34+01:00 Calving on tidewater glaciers amplified by submarine frontal melting ... O'Leary, Martin Christoffersen, Poul 2019 https://dx.doi.org/10.17863/cam.45338 https://www.repository.cam.ac.uk/handle/1810/298283 en eng Copernicus Publications 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 Article ScholarlyArticle JournalArticle article-journal 2019 ftdatacite https://doi.org/10.17863/cam.45338 2024-01-05T09:50:49Z While it has been shown repeatedly that ocean conditions exhibit an important control on the behaviour of grounded tidewater glaciers, modelling studies have focused largely on the effects of basal and surface melting. Here, a finite-element model of stresses near the front of a tidewater glacier is used to investigate the effects of frontal melting on calving, independently of the calving criterion used. Applications of the stress model to idealized scenarios reveal that undercutting of the ice front due to frontal melting can drive calving at up to ten times the mean melt rate. Factors which cause increased frontal melt-driven calving include a strong thermal gradient in the ice, and a concentration of frontal melt at the base of the glacier. These properties are typical of both Arctic and Antarctic tidewater glaciers. The finding that frontal melt near the base is a strong driver of calving leads to the conclusion that water temperatures near the bed of the glacier are critically important to the glacier ... Article in Journal/Newspaper Antarc* Antarctic Arctic Tidewater DataCite Metadata Store (German National Library of Science and Technology) Antarctic Arctic |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
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ftdatacite |
language |
English |
description |
While it has been shown repeatedly that ocean conditions exhibit an important control on the behaviour of grounded tidewater glaciers, modelling studies have focused largely on the effects of basal and surface melting. Here, a finite-element model of stresses near the front of a tidewater glacier is used to investigate the effects of frontal melting on calving, independently of the calving criterion used. Applications of the stress model to idealized scenarios reveal that undercutting of the ice front due to frontal melting can drive calving at up to ten times the mean melt rate. Factors which cause increased frontal melt-driven calving include a strong thermal gradient in the ice, and a concentration of frontal melt at the base of the glacier. These properties are typical of both Arctic and Antarctic tidewater glaciers. The finding that frontal melt near the base is a strong driver of calving leads to the conclusion that water temperatures near the bed of the glacier are critically important to the glacier ... |
format |
Article in Journal/Newspaper |
author |
O'Leary, Martin Christoffersen, Poul |
spellingShingle |
O'Leary, Martin Christoffersen, Poul Calving on tidewater glaciers amplified by submarine frontal melting ... |
author_facet |
O'Leary, Martin Christoffersen, Poul |
author_sort |
O'Leary, Martin |
title |
Calving on tidewater glaciers amplified by submarine frontal melting ... |
title_short |
Calving on tidewater glaciers amplified by submarine frontal melting ... |
title_full |
Calving on tidewater glaciers amplified by submarine frontal melting ... |
title_fullStr |
Calving on tidewater glaciers amplified by submarine frontal melting ... |
title_full_unstemmed |
Calving on tidewater glaciers amplified by submarine frontal melting ... |
title_sort |
calving on tidewater glaciers amplified by submarine frontal melting ... |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://dx.doi.org/10.17863/cam.45338 https://www.repository.cam.ac.uk/handle/1810/298283 |
geographic |
Antarctic Arctic |
geographic_facet |
Antarctic Arctic |
genre |
Antarc* Antarctic Arctic Tidewater |
genre_facet |
Antarc* Antarctic Arctic Tidewater |
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.45338 |
_version_ |
1789959591330578432 |