Ice stream subglacial access for ice sheet history and fast ice flow: The BEAMISH Project on Rutford Ice Stream, West Antarctica and initial results on basal conditions
Three holes were drilled to the bed of Rutford Ice Stream, through ice up to 2154 m thick, to investigate the basal processes and conditions associated with fast ice flow and the glacial history of the West Antarctic Ice Sheet. A narrative of the drilling, measuring and sampling activities, as well...
Published in: | Annals of Glaciology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Cambridge University Press
2021
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Online Access: | http://nora.nerc.ac.uk/id/eprint/528241/ https://nora.nerc.ac.uk/id/eprint/528241/1/ice-stream-subglacial-access-for-ice-sheet-history-and-fast-ice-flow-the-beamish-project-on-rutford-ice-stream-west-antarctica-and-initial-results-on-basal-conditions.pdf https://www.cambridge.org/core/journals/annals-of-glaciology/article/ice-stream-subglacial-access-for-icesheet-history-and-fast-ice-flow-the-beamish-project-on-rutford-ice-stream-west-antarctica-and-initial-results-on-basal-conditions/E9309E86587D8E38AF24 |
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ftnerc:oai:nora.nerc.ac.uk:528241 2023-05-15T13:29:49+02:00 Ice stream subglacial access for ice sheet history and fast ice flow: The BEAMISH Project on Rutford Ice Stream, West Antarctica and initial results on basal conditions Smith, A.M. Anker, P.G.D. Nicholls, K.W. Makinson, K. Murray, T. Rios-Costas, S. Brisbourne, A.M. Hodgson, D.A. Schlegel, R. Anandkrishnan, S. 2021-09 text http://nora.nerc.ac.uk/id/eprint/528241/ https://nora.nerc.ac.uk/id/eprint/528241/1/ice-stream-subglacial-access-for-ice-sheet-history-and-fast-ice-flow-the-beamish-project-on-rutford-ice-stream-west-antarctica-and-initial-results-on-basal-conditions.pdf https://www.cambridge.org/core/journals/annals-of-glaciology/article/ice-stream-subglacial-access-for-icesheet-history-and-fast-ice-flow-the-beamish-project-on-rutford-ice-stream-west-antarctica-and-initial-results-on-basal-conditions/E9309E86587D8E38AF24 en eng Cambridge University Press https://nora.nerc.ac.uk/id/eprint/528241/1/ice-stream-subglacial-access-for-ice-sheet-history-and-fast-ice-flow-the-beamish-project-on-rutford-ice-stream-west-antarctica-and-initial-results-on-basal-conditions.pdf Smith, A.M. orcid:0000-0001-8577-482X Anker, P.G.D. orcid:0000-0002-4359-4342 Nicholls, K.W. orcid:0000-0002-2188-4509 Makinson, K. orcid:0000-0002-5791-1767 Murray, T.; Rios-Costas, S.; Brisbourne, A.M. orcid:0000-0002-9887-7120 Hodgson, D.A. orcid:0000-0002-3841-3746 Schlegel, R.; Anandkrishnan, S. 2021 Ice stream subglacial access for ice sheet history and fast ice flow: The BEAMISH Project on Rutford Ice Stream, West Antarctica and initial results on basal conditions [in special issue: Drilling through the Ice] Annals of Glaciology, 62 (85-86). 203 -211. https://doi.org/10.1017/aog.2020.82 <https://doi.org/10.1017/aog.2020.82> cc_by_4 CC-BY Publication - Article PeerReviewed 2021 ftnerc https://doi.org/10.1017/aog.2020.82 2023-02-04T19:50:59Z Three holes were drilled to the bed of Rutford Ice Stream, through ice up to 2154 m thick, to investigate the basal processes and conditions associated with fast ice flow and the glacial history of the West Antarctic Ice Sheet. A narrative of the drilling, measuring and sampling activities, as well as some preliminary results and initial interpretations of subglacial conditions, is given. These were the deepest subglacial access holes ever drilled using the hot-water drilling method. Samples of bed and englacial sediments were recovered, and a number of instruments were installed in the ice column and the bed. The ice-bed interface was found to be unfrozen, with an existing, well-developed subglacial hydrological system at high pressure, within ∼1% of the ice overburden. The bed itself comprises soft, water-saturated sediments, consistent with previous geophysical interpretations. Englacial sediment quantity varies significantly between two locations ∼2 km apart, and possibly over even shorter (∼20 m) distances. Difficulties and unusual observations encountered while connecting to the subglacial hydrological system in one hole possibly resulted from the presence of a large clast embedded in the bottom of the ice. Article in Journal/Newspaper Annals of Glaciology Antarc* Antarctic Antarctica Ice Sheet Rutford Ice Stream West Antarctica Natural Environment Research Council: NERC Open Research Archive Antarctic West Antarctica West Antarctic Ice Sheet Rutford ENVELOPE(-85.300,-85.300,-78.600,-78.600) Rutford Ice Stream ENVELOPE(-80.000,-80.000,-79.167,-79.167) Annals of Glaciology 1 9 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Three holes were drilled to the bed of Rutford Ice Stream, through ice up to 2154 m thick, to investigate the basal processes and conditions associated with fast ice flow and the glacial history of the West Antarctic Ice Sheet. A narrative of the drilling, measuring and sampling activities, as well as some preliminary results and initial interpretations of subglacial conditions, is given. These were the deepest subglacial access holes ever drilled using the hot-water drilling method. Samples of bed and englacial sediments were recovered, and a number of instruments were installed in the ice column and the bed. The ice-bed interface was found to be unfrozen, with an existing, well-developed subglacial hydrological system at high pressure, within ∼1% of the ice overburden. The bed itself comprises soft, water-saturated sediments, consistent with previous geophysical interpretations. Englacial sediment quantity varies significantly between two locations ∼2 km apart, and possibly over even shorter (∼20 m) distances. Difficulties and unusual observations encountered while connecting to the subglacial hydrological system in one hole possibly resulted from the presence of a large clast embedded in the bottom of the ice. |
format |
Article in Journal/Newspaper |
author |
Smith, A.M. Anker, P.G.D. Nicholls, K.W. Makinson, K. Murray, T. Rios-Costas, S. Brisbourne, A.M. Hodgson, D.A. Schlegel, R. Anandkrishnan, S. |
spellingShingle |
Smith, A.M. Anker, P.G.D. Nicholls, K.W. Makinson, K. Murray, T. Rios-Costas, S. Brisbourne, A.M. Hodgson, D.A. Schlegel, R. Anandkrishnan, S. Ice stream subglacial access for ice sheet history and fast ice flow: The BEAMISH Project on Rutford Ice Stream, West Antarctica and initial results on basal conditions |
author_facet |
Smith, A.M. Anker, P.G.D. Nicholls, K.W. Makinson, K. Murray, T. Rios-Costas, S. Brisbourne, A.M. Hodgson, D.A. Schlegel, R. Anandkrishnan, S. |
author_sort |
Smith, A.M. |
title |
Ice stream subglacial access for ice sheet history and fast ice flow: The BEAMISH Project on Rutford Ice Stream, West Antarctica and initial results on basal conditions |
title_short |
Ice stream subglacial access for ice sheet history and fast ice flow: The BEAMISH Project on Rutford Ice Stream, West Antarctica and initial results on basal conditions |
title_full |
Ice stream subglacial access for ice sheet history and fast ice flow: The BEAMISH Project on Rutford Ice Stream, West Antarctica and initial results on basal conditions |
title_fullStr |
Ice stream subglacial access for ice sheet history and fast ice flow: The BEAMISH Project on Rutford Ice Stream, West Antarctica and initial results on basal conditions |
title_full_unstemmed |
Ice stream subglacial access for ice sheet history and fast ice flow: The BEAMISH Project on Rutford Ice Stream, West Antarctica and initial results on basal conditions |
title_sort |
ice stream subglacial access for ice sheet history and fast ice flow: the beamish project on rutford ice stream, west antarctica and initial results on basal conditions |
publisher |
Cambridge University Press |
publishDate |
2021 |
url |
http://nora.nerc.ac.uk/id/eprint/528241/ https://nora.nerc.ac.uk/id/eprint/528241/1/ice-stream-subglacial-access-for-ice-sheet-history-and-fast-ice-flow-the-beamish-project-on-rutford-ice-stream-west-antarctica-and-initial-results-on-basal-conditions.pdf https://www.cambridge.org/core/journals/annals-of-glaciology/article/ice-stream-subglacial-access-for-icesheet-history-and-fast-ice-flow-the-beamish-project-on-rutford-ice-stream-west-antarctica-and-initial-results-on-basal-conditions/E9309E86587D8E38AF24 |
long_lat |
ENVELOPE(-85.300,-85.300,-78.600,-78.600) ENVELOPE(-80.000,-80.000,-79.167,-79.167) |
geographic |
Antarctic West Antarctica West Antarctic Ice Sheet Rutford Rutford Ice Stream |
geographic_facet |
Antarctic West Antarctica West Antarctic Ice Sheet Rutford Rutford Ice Stream |
genre |
Annals of Glaciology Antarc* Antarctic Antarctica Ice Sheet Rutford Ice Stream West Antarctica |
genre_facet |
Annals of Glaciology Antarc* Antarctic Antarctica Ice Sheet Rutford Ice Stream West Antarctica |
op_relation |
https://nora.nerc.ac.uk/id/eprint/528241/1/ice-stream-subglacial-access-for-ice-sheet-history-and-fast-ice-flow-the-beamish-project-on-rutford-ice-stream-west-antarctica-and-initial-results-on-basal-conditions.pdf Smith, A.M. orcid:0000-0001-8577-482X Anker, P.G.D. orcid:0000-0002-4359-4342 Nicholls, K.W. orcid:0000-0002-2188-4509 Makinson, K. orcid:0000-0002-5791-1767 Murray, T.; Rios-Costas, S.; Brisbourne, A.M. orcid:0000-0002-9887-7120 Hodgson, D.A. orcid:0000-0002-3841-3746 Schlegel, R.; Anandkrishnan, S. 2021 Ice stream subglacial access for ice sheet history and fast ice flow: The BEAMISH Project on Rutford Ice Stream, West Antarctica and initial results on basal conditions [in special issue: Drilling through the Ice] Annals of Glaciology, 62 (85-86). 203 -211. https://doi.org/10.1017/aog.2020.82 <https://doi.org/10.1017/aog.2020.82> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1017/aog.2020.82 |
container_title |
Annals of Glaciology |
container_start_page |
1 |
op_container_end_page |
9 |
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1766003339146821632 |