Ice stream or not? Radio-echo sounding of Carlson Inlet, West Antarctica
The Antarctic Ice Sheet loses mass to the surrounding ocean mainly by drainage through a network of ice streams: fast-flowing glaciers bounded on either side by ice flowing one or two orders of magnitude more slowly. Ice streams flow despite low driving stress because of low basal resistance but are...
Published in: | The Cryosphere |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2011
|
Subjects: | |
Online Access: | https://doi.org/10.5194/tc-5-907-2011 https://noa.gwlb.de/receive/cop_mods_00026654 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00026609/tc-5-907-2011.pdf https://tc.copernicus.org/articles/5/907/2011/tc-5-907-2011.pdf |
id |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00026654 |
---|---|
record_format |
openpolar |
spelling |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00026654 2023-05-15T13:36:44+02:00 Ice stream or not? Radio-echo sounding of Carlson Inlet, West Antarctica King, E. C. 2011-10 electronic https://doi.org/10.5194/tc-5-907-2011 https://noa.gwlb.de/receive/cop_mods_00026654 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00026609/tc-5-907-2011.pdf https://tc.copernicus.org/articles/5/907/2011/tc-5-907-2011.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-5-907-2011 https://noa.gwlb.de/receive/cop_mods_00026654 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00026609/tc-5-907-2011.pdf https://tc.copernicus.org/articles/5/907/2011/tc-5-907-2011.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2011 ftnonlinearchiv https://doi.org/10.5194/tc-5-907-2011 2022-02-08T22:49:07Z The Antarctic Ice Sheet loses mass to the surrounding ocean mainly by drainage through a network of ice streams: fast-flowing glaciers bounded on either side by ice flowing one or two orders of magnitude more slowly. Ice streams flow despite low driving stress because of low basal resistance but are known to cease flowing if the basal conditions change, which can take place when subglacial sediment becomes dewatered by freezing or by a change in hydraulic pathways. Carlson Inlet, Antarctica has been interpreted as a stagnated ice stream, based on surface and basal morphology and shallow radar reflection profiling. To resolve the question of whether the flow history of Carlson Inlet has changed in the past, I conducted a ground-based radar survey of Carlson Inlet, the adjacent part of Rutford Ice Stream, and Talutis Inlet, West Antarctica. This survey provides details of the internal ice stratigraphy and allows the flow history to be interpreted. Tight folding of isochrones in Rutford Ice Stream and Talutis Inlet is interpreted to be the result of lateral compression during convergent flow from a wide catchment into a narrow, fast-flowing trunk. In contrast, the central part of Carlson Inlet has gently-folded isochrones that drape over the bed topography, suggestive of local accumulation and slow flow. A 1-D thermo-mechanical model was used to estimate the age of the ice. I conclude that the ice in the centre of Carlson Inlet has been near-stagnant for between 3500 and 6800 yr and that fast flow has not occurred there during that time period. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Rutford Ice Stream The Cryosphere West Antarctica Niedersächsisches Online-Archiv NOA Antarctic Carlson Inlet ENVELOPE(-80.000,-80.000,-77.833,-77.833) Rutford ENVELOPE(-85.300,-85.300,-78.600,-78.600) Rutford Ice Stream ENVELOPE(-80.000,-80.000,-79.167,-79.167) Talutis Inlet ENVELOPE(-81.500,-81.500,-77.250,-77.250) The Antarctic West Antarctica The Cryosphere 5 4 907 916 |
institution |
Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung King, E. C. Ice stream or not? Radio-echo sounding of Carlson Inlet, West Antarctica |
topic_facet |
article Verlagsveröffentlichung |
description |
The Antarctic Ice Sheet loses mass to the surrounding ocean mainly by drainage through a network of ice streams: fast-flowing glaciers bounded on either side by ice flowing one or two orders of magnitude more slowly. Ice streams flow despite low driving stress because of low basal resistance but are known to cease flowing if the basal conditions change, which can take place when subglacial sediment becomes dewatered by freezing or by a change in hydraulic pathways. Carlson Inlet, Antarctica has been interpreted as a stagnated ice stream, based on surface and basal morphology and shallow radar reflection profiling. To resolve the question of whether the flow history of Carlson Inlet has changed in the past, I conducted a ground-based radar survey of Carlson Inlet, the adjacent part of Rutford Ice Stream, and Talutis Inlet, West Antarctica. This survey provides details of the internal ice stratigraphy and allows the flow history to be interpreted. Tight folding of isochrones in Rutford Ice Stream and Talutis Inlet is interpreted to be the result of lateral compression during convergent flow from a wide catchment into a narrow, fast-flowing trunk. In contrast, the central part of Carlson Inlet has gently-folded isochrones that drape over the bed topography, suggestive of local accumulation and slow flow. A 1-D thermo-mechanical model was used to estimate the age of the ice. I conclude that the ice in the centre of Carlson Inlet has been near-stagnant for between 3500 and 6800 yr and that fast flow has not occurred there during that time period. |
format |
Article in Journal/Newspaper |
author |
King, E. C. |
author_facet |
King, E. C. |
author_sort |
King, E. C. |
title |
Ice stream or not? Radio-echo sounding of Carlson Inlet, West Antarctica |
title_short |
Ice stream or not? Radio-echo sounding of Carlson Inlet, West Antarctica |
title_full |
Ice stream or not? Radio-echo sounding of Carlson Inlet, West Antarctica |
title_fullStr |
Ice stream or not? Radio-echo sounding of Carlson Inlet, West Antarctica |
title_full_unstemmed |
Ice stream or not? Radio-echo sounding of Carlson Inlet, West Antarctica |
title_sort |
ice stream or not? radio-echo sounding of carlson inlet, west antarctica |
publisher |
Copernicus Publications |
publishDate |
2011 |
url |
https://doi.org/10.5194/tc-5-907-2011 https://noa.gwlb.de/receive/cop_mods_00026654 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00026609/tc-5-907-2011.pdf https://tc.copernicus.org/articles/5/907/2011/tc-5-907-2011.pdf |
long_lat |
ENVELOPE(-80.000,-80.000,-77.833,-77.833) ENVELOPE(-85.300,-85.300,-78.600,-78.600) ENVELOPE(-80.000,-80.000,-79.167,-79.167) ENVELOPE(-81.500,-81.500,-77.250,-77.250) |
geographic |
Antarctic Carlson Inlet Rutford Rutford Ice Stream Talutis Inlet The Antarctic West Antarctica |
geographic_facet |
Antarctic Carlson Inlet Rutford Rutford Ice Stream Talutis Inlet The Antarctic West Antarctica |
genre |
Antarc* Antarctic Antarctica Ice Sheet Rutford Ice Stream The Cryosphere West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Rutford Ice Stream The Cryosphere West Antarctica |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-5-907-2011 https://noa.gwlb.de/receive/cop_mods_00026654 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00026609/tc-5-907-2011.pdf https://tc.copernicus.org/articles/5/907/2011/tc-5-907-2011.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-5-907-2011 |
container_title |
The Cryosphere |
container_volume |
5 |
container_issue |
4 |
container_start_page |
907 |
op_container_end_page |
916 |
_version_ |
1766083222176792576 |