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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Language: | English |
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Cambridge University Press
2021
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Online Access: | https://doi.org/10.1017/aog.2020.82 https://doaj.org/article/26e84130c0d9457f9b73935a230282aa |
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ftdoajarticles:oai:doaj.org/article:26e84130c0d9457f9b73935a230282aa 2023-05-15T13:29:30+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 A. M. Smith P. G. D. Anker K. W. Nicholls K. Makinson T. Murray S. Rios-Costas A. M. Brisbourne D. A. Hodgson R. Schlegel S. Anandakrishnan 2021-09-01T00:00:00Z https://doi.org/10.1017/aog.2020.82 https://doaj.org/article/26e84130c0d9457f9b73935a230282aa EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0260305520000828/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.1017/aog.2020.82 0260-3055 1727-5644 https://doaj.org/article/26e84130c0d9457f9b73935a230282aa Annals of Glaciology, Vol 62, Pp 203-211 (2021) Antarctic glaciology ice dynamics ice streams subglacial processes subglacial sediments Meteorology. Climatology QC851-999 article 2021 ftdoajarticles https://doi.org/10.1017/aog.2020.82 2023-03-12T01:31:55Z 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 Directory of Open Access Journals: DOAJ Articles 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 62 85-86 203 211 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctic glaciology ice dynamics ice streams subglacial processes subglacial sediments Meteorology. Climatology QC851-999 |
spellingShingle |
Antarctic glaciology ice dynamics ice streams subglacial processes subglacial sediments Meteorology. Climatology QC851-999 A. M. Smith P. G. D. Anker K. W. Nicholls K. Makinson T. Murray S. Rios-Costas A. M. Brisbourne D. A. Hodgson R. Schlegel S. Anandakrishnan 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 |
topic_facet |
Antarctic glaciology ice dynamics ice streams subglacial processes subglacial sediments Meteorology. Climatology QC851-999 |
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 |
A. M. Smith P. G. D. Anker K. W. Nicholls K. Makinson T. Murray S. Rios-Costas A. M. Brisbourne D. A. Hodgson R. Schlegel S. Anandakrishnan |
author_facet |
A. M. Smith P. G. D. Anker K. W. Nicholls K. Makinson T. Murray S. Rios-Costas A. M. Brisbourne D. A. Hodgson R. Schlegel S. Anandakrishnan |
author_sort |
A. M. Smith |
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 |
https://doi.org/10.1017/aog.2020.82 https://doaj.org/article/26e84130c0d9457f9b73935a230282aa |
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_source |
Annals of Glaciology, Vol 62, Pp 203-211 (2021) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0260305520000828/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.1017/aog.2020.82 0260-3055 1727-5644 https://doaj.org/article/26e84130c0d9457f9b73935a230282aa |
op_doi |
https://doi.org/10.1017/aog.2020.82 |
container_title |
Annals of Glaciology |
container_volume |
62 |
container_issue |
85-86 |
container_start_page |
203 |
op_container_end_page |
211 |
_version_ |
1766000954676609024 |