Subglacial hydrological control on flow of an Antarctic Peninsula palaeo-ice stream
Basal hydrological systems play an important role in controlling the dynamic behaviour of ice streams. Data showing their morphology and relationship to geological substrates beneath modern ice streams are, however, sparse and difficult to collect. We present new multibeam bathymetry data that make...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2019
|
Subjects: | |
Online Access: | https://doi.org/10.5194/tc-13-1583-2019 https://doaj.org/article/10084b80a80949f88c4c230be2de7609 |
id |
ftdoajarticles:oai:doaj.org/article:10084b80a80949f88c4c230be2de7609 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:10084b80a80949f88c4c230be2de7609 2023-05-15T13:44:10+02:00 Subglacial hydrological control on flow of an Antarctic Peninsula palaeo-ice stream R. D. Larter K. A. Hogan C.-D. Hillenbrand J. A. Smith C. L. Batchelor M. Cartigny A. J. Tate J. D. Kirkham Z. A. Roseby G. Kuhn A. G. C. Graham J. A. Dowdeswell 2019-06-01T00:00:00Z https://doi.org/10.5194/tc-13-1583-2019 https://doaj.org/article/10084b80a80949f88c4c230be2de7609 EN eng Copernicus Publications https://www.the-cryosphere.net/13/1583/2019/tc-13-1583-2019.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-13-1583-2019 1994-0416 1994-0424 https://doaj.org/article/10084b80a80949f88c4c230be2de7609 The Cryosphere, Vol 13, Pp 1583-1596 (2019) Environmental sciences GE1-350 Geology QE1-996.5 article 2019 ftdoajarticles https://doi.org/10.5194/tc-13-1583-2019 2022-12-31T10:25:17Z Basal hydrological systems play an important role in controlling the dynamic behaviour of ice streams. Data showing their morphology and relationship to geological substrates beneath modern ice streams are, however, sparse and difficult to collect. We present new multibeam bathymetry data that make the Anvers-Hugo Trough west of the Antarctic Peninsula the most completely surveyed palaeo-ice stream pathway in Antarctica. The data reveal a diverse range of landforms, including streamlined features where there was fast flow in the palaeo-ice stream, channels eroded by flow of subglacial water, and compelling evidence of palaeo-ice stream shear margin locations. We interpret landforms as indicating that subglacial water availability played an important role in facilitating ice stream flow and controlling shear margin positions. Water was likely supplied to the ice stream bed episodically as a result of outbursts from a subglacial lake located in the Palmer Deep basin on the inner continental shelf. These interpretations have implications for controls on the onset of fast ice flow, the dynamic behaviour of palaeo-ice streams on the Antarctic continental shelf, and potentially also for behaviour of modern ice streams. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica The Cryosphere Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Antarctic Peninsula Anvers ENVELOPE(-63.500,-63.500,-64.600,-64.600) Palmer Deep ENVELOPE(-64.400,-64.400,-64.950,-64.950) The Cryosphere 13 6 1583 1596 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 R. D. Larter K. A. Hogan C.-D. Hillenbrand J. A. Smith C. L. Batchelor M. Cartigny A. J. Tate J. D. Kirkham Z. A. Roseby G. Kuhn A. G. C. Graham J. A. Dowdeswell Subglacial hydrological control on flow of an Antarctic Peninsula palaeo-ice stream |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Basal hydrological systems play an important role in controlling the dynamic behaviour of ice streams. Data showing their morphology and relationship to geological substrates beneath modern ice streams are, however, sparse and difficult to collect. We present new multibeam bathymetry data that make the Anvers-Hugo Trough west of the Antarctic Peninsula the most completely surveyed palaeo-ice stream pathway in Antarctica. The data reveal a diverse range of landforms, including streamlined features where there was fast flow in the palaeo-ice stream, channels eroded by flow of subglacial water, and compelling evidence of palaeo-ice stream shear margin locations. We interpret landforms as indicating that subglacial water availability played an important role in facilitating ice stream flow and controlling shear margin positions. Water was likely supplied to the ice stream bed episodically as a result of outbursts from a subglacial lake located in the Palmer Deep basin on the inner continental shelf. These interpretations have implications for controls on the onset of fast ice flow, the dynamic behaviour of palaeo-ice streams on the Antarctic continental shelf, and potentially also for behaviour of modern ice streams. |
format |
Article in Journal/Newspaper |
author |
R. D. Larter K. A. Hogan C.-D. Hillenbrand J. A. Smith C. L. Batchelor M. Cartigny A. J. Tate J. D. Kirkham Z. A. Roseby G. Kuhn A. G. C. Graham J. A. Dowdeswell |
author_facet |
R. D. Larter K. A. Hogan C.-D. Hillenbrand J. A. Smith C. L. Batchelor M. Cartigny A. J. Tate J. D. Kirkham Z. A. Roseby G. Kuhn A. G. C. Graham J. A. Dowdeswell |
author_sort |
R. D. Larter |
title |
Subglacial hydrological control on flow of an Antarctic Peninsula palaeo-ice stream |
title_short |
Subglacial hydrological control on flow of an Antarctic Peninsula palaeo-ice stream |
title_full |
Subglacial hydrological control on flow of an Antarctic Peninsula palaeo-ice stream |
title_fullStr |
Subglacial hydrological control on flow of an Antarctic Peninsula palaeo-ice stream |
title_full_unstemmed |
Subglacial hydrological control on flow of an Antarctic Peninsula palaeo-ice stream |
title_sort |
subglacial hydrological control on flow of an antarctic peninsula palaeo-ice stream |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/tc-13-1583-2019 https://doaj.org/article/10084b80a80949f88c4c230be2de7609 |
long_lat |
ENVELOPE(-63.500,-63.500,-64.600,-64.600) ENVELOPE(-64.400,-64.400,-64.950,-64.950) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Anvers Palmer Deep |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Anvers Palmer Deep |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica The Cryosphere |
op_source |
The Cryosphere, Vol 13, Pp 1583-1596 (2019) |
op_relation |
https://www.the-cryosphere.net/13/1583/2019/tc-13-1583-2019.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-13-1583-2019 1994-0416 1994-0424 https://doaj.org/article/10084b80a80949f88c4c230be2de7609 |
op_doi |
https://doi.org/10.5194/tc-13-1583-2019 |
container_title |
The Cryosphere |
container_volume |
13 |
container_issue |
6 |
container_start_page |
1583 |
op_container_end_page |
1596 |
_version_ |
1766198320600973312 |