The evolution of the subglacial landscape of Antarctica.
The aim is to investigate the evolution of the subglacial landscape of Antarctica using an ice sheet and erosion model. We identify different stages of continental glaciation and model the erosion processes associated with each stage. The model links erosion to the basal thermal regime and indicates...
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ftunivdurham:oai:dro.dur.ac.uk.OAI2:7471 2023-05-15T14:04:18+02:00 The evolution of the subglacial landscape of Antarctica. Jamieson, S.S.R. Sugden, D.E. Hulton, N.R.J. 2010-04-01 application/pdf http://dro.dur.ac.uk/7471/ http://dro.dur.ac.uk/7471/1/7471.pdf https://doi.org/10.1016/j.epsl.2010.02.012 unknown Elsevier dro:7471 issn:0012-821X doi:10.1016/j.epsl.2010.02.012 http://dro.dur.ac.uk/7471/ http://dx.doi.org/10.1016/j.epsl.2010.02.012 http://dro.dur.ac.uk/7471/1/7471.pdf NOTICE: this is the author’s version of a work that was accepted for publication in Earth and planetary science letters. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Earth and planetary science letters, 293, 1-2, 2010,10.1016/j.epsl.2010.02.012 Earth and planetary science letters, 2010, Vol.293(1-2), pp.1-27 [Peer Reviewed Journal] Landscape evolution Erosion Ice sheet Topography Antarctica Model. Article PeerReviewed 2010 ftunivdurham https://doi.org/10.1016/j.epsl.2010.02.012 2020-05-28T22:28:08Z The aim is to investigate the evolution of the subglacial landscape of Antarctica using an ice sheet and erosion model. We identify different stages of continental glaciation and model the erosion processes associated with each stage. The model links erosion to the basal thermal regime and indicates that much of the Antarctic interior may have been subject to less than 200 m of erosion. The depth of erosion reflects the presence or absence of warm-based ice and the consistency of ice flow direction. This information, linked with knowledge about landscapes of glaciation in the northern hemisphere and some simple but robust assumptions about initial topography, is used to generate a map of the subglacial Antarctic landscape in which much of the lowland interior resembles the landscapes of areal scouring typical of the Laurentian and Scandinavian shields. Near the continental margins selective linear erosion has overdeepened pre-existing river valleys by as much as 2.8 km. High elevation plateaus adjacent to such drainage systems have survived largely unmodified under cold-based ice. High erosion rates result from steep thermal gradients in basal ice. Mountain regions such as the Gamburtsev Mountains, uplands in Dronning Maud Land and massifs in West Antarctica are likely to bear features of local alpine glaciation. Such landscapes may have been protected under cold-based ice for the last 34 Myrs or possibly longer. Article in Journal/Newspaper Antarc* Antarctic Antarctica Dronning Maud Land Ice Sheet West Antarctica Durham University: Durham Research Online Antarctic Dronning Maud Land The Antarctic West Antarctica Earth and Planetary Science Letters 293 1-2 1 27 |
institution |
Open Polar |
collection |
Durham University: Durham Research Online |
op_collection_id |
ftunivdurham |
language |
unknown |
topic |
Landscape evolution Erosion Ice sheet Topography Antarctica Model. |
spellingShingle |
Landscape evolution Erosion Ice sheet Topography Antarctica Model. Jamieson, S.S.R. Sugden, D.E. Hulton, N.R.J. The evolution of the subglacial landscape of Antarctica. |
topic_facet |
Landscape evolution Erosion Ice sheet Topography Antarctica Model. |
description |
The aim is to investigate the evolution of the subglacial landscape of Antarctica using an ice sheet and erosion model. We identify different stages of continental glaciation and model the erosion processes associated with each stage. The model links erosion to the basal thermal regime and indicates that much of the Antarctic interior may have been subject to less than 200 m of erosion. The depth of erosion reflects the presence or absence of warm-based ice and the consistency of ice flow direction. This information, linked with knowledge about landscapes of glaciation in the northern hemisphere and some simple but robust assumptions about initial topography, is used to generate a map of the subglacial Antarctic landscape in which much of the lowland interior resembles the landscapes of areal scouring typical of the Laurentian and Scandinavian shields. Near the continental margins selective linear erosion has overdeepened pre-existing river valleys by as much as 2.8 km. High elevation plateaus adjacent to such drainage systems have survived largely unmodified under cold-based ice. High erosion rates result from steep thermal gradients in basal ice. Mountain regions such as the Gamburtsev Mountains, uplands in Dronning Maud Land and massifs in West Antarctica are likely to bear features of local alpine glaciation. Such landscapes may have been protected under cold-based ice for the last 34 Myrs or possibly longer. |
format |
Article in Journal/Newspaper |
author |
Jamieson, S.S.R. Sugden, D.E. Hulton, N.R.J. |
author_facet |
Jamieson, S.S.R. Sugden, D.E. Hulton, N.R.J. |
author_sort |
Jamieson, S.S.R. |
title |
The evolution of the subglacial landscape of Antarctica. |
title_short |
The evolution of the subglacial landscape of Antarctica. |
title_full |
The evolution of the subglacial landscape of Antarctica. |
title_fullStr |
The evolution of the subglacial landscape of Antarctica. |
title_full_unstemmed |
The evolution of the subglacial landscape of Antarctica. |
title_sort |
evolution of the subglacial landscape of antarctica. |
publisher |
Elsevier |
publishDate |
2010 |
url |
http://dro.dur.ac.uk/7471/ http://dro.dur.ac.uk/7471/1/7471.pdf https://doi.org/10.1016/j.epsl.2010.02.012 |
geographic |
Antarctic Dronning Maud Land The Antarctic West Antarctica |
geographic_facet |
Antarctic Dronning Maud Land The Antarctic West Antarctica |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land Ice Sheet West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land Ice Sheet West Antarctica |
op_source |
Earth and planetary science letters, 2010, Vol.293(1-2), pp.1-27 [Peer Reviewed Journal] |
op_relation |
dro:7471 issn:0012-821X doi:10.1016/j.epsl.2010.02.012 http://dro.dur.ac.uk/7471/ http://dx.doi.org/10.1016/j.epsl.2010.02.012 http://dro.dur.ac.uk/7471/1/7471.pdf |
op_rights |
NOTICE: this is the author’s version of a work that was accepted for publication in Earth and planetary science letters. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Earth and planetary science letters, 293, 1-2, 2010,10.1016/j.epsl.2010.02.012 |
op_doi |
https://doi.org/10.1016/j.epsl.2010.02.012 |
container_title |
Earth and Planetary Science Letters |
container_volume |
293 |
container_issue |
1-2 |
container_start_page |
1 |
op_container_end_page |
27 |
_version_ |
1766275331135635456 |