Fast-flow signature in the stagnated Kamb Ice Stream, West Antarctica
Among the major ice streams that drain West Antarctica, Kamb Ice Stream (formerly called Ice Stream C) is unique in that it stagnated ∼150 yr ago, but its former fast-flow conditions are virtually unknown. Here we present surface-based radar profiles of the ice stream's undulating internal stra...
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Language: | English |
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Geological Society of America
2004
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Online Access: | https://eprints.whiterose.ac.uk/92154/ https://eprints.whiterose.ac.uk/92154/1/G20317_Ng_merged.pdf https://doi.org/10.1130/G20317.1 |
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ftleedsuniv:oai:eprints.whiterose.ac.uk:92154 2023-05-15T13:55:00+02:00 Fast-flow signature in the stagnated Kamb Ice Stream, West Antarctica Ng, F. Conway, H. 2004-06 text https://eprints.whiterose.ac.uk/92154/ https://eprints.whiterose.ac.uk/92154/1/G20317_Ng_merged.pdf https://doi.org/10.1130/G20317.1 en eng Geological Society of America https://eprints.whiterose.ac.uk/92154/1/G20317_Ng_merged.pdf Ng, F. and Conway, H. (2004) Fast-flow signature in the stagnated Kamb Ice Stream, West Antarctica. Geology, 32 (6). 481 - 484. ISSN 0091-7613 Article PeerReviewed 2004 ftleedsuniv https://doi.org/10.1130/G20317.1 2023-01-30T21:36:56Z Among the major ice streams that drain West Antarctica, Kamb Ice Stream (formerly called Ice Stream C) is unique in that it stagnated ∼150 yr ago, but its former fast-flow conditions are virtually unknown. Here we present surface-based radar profiles of the ice stream's undulating internal stratigraphy, which records these conditions. Our analysis of the profiles indicates that pre stagnation flow velocities, averaged over a period <740 yr, exceeded 350 m·yr−1 in the trunk of the ice stream. This velocity constraint would be lower if the ice had been thickening (higher if thinning), but suggests mass loss from the ice-stream catchment that is of sufficient magnitude to reverse the gain estimated for today's Siple Coast region. Analysis of other ice streams would allow comparison of velocities over millennial time scales with observations of present-day velocities, useful for evaluating how West Antarctic ice drainage has evolved. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Stream C Kamb Ice Stream West Antarctica White Rose Research Online (Universities of Leeds, Sheffield & York) Antarctic West Antarctica Siple ENVELOPE(-83.917,-83.917,-75.917,-75.917) Siple Coast ENVELOPE(-155.000,-155.000,-82.000,-82.000) Kamb Ice Stream ENVELOPE(-145.000,-145.000,-82.250,-82.250) Geology 32 6 481 |
institution |
Open Polar |
collection |
White Rose Research Online (Universities of Leeds, Sheffield & York) |
op_collection_id |
ftleedsuniv |
language |
English |
description |
Among the major ice streams that drain West Antarctica, Kamb Ice Stream (formerly called Ice Stream C) is unique in that it stagnated ∼150 yr ago, but its former fast-flow conditions are virtually unknown. Here we present surface-based radar profiles of the ice stream's undulating internal stratigraphy, which records these conditions. Our analysis of the profiles indicates that pre stagnation flow velocities, averaged over a period <740 yr, exceeded 350 m·yr−1 in the trunk of the ice stream. This velocity constraint would be lower if the ice had been thickening (higher if thinning), but suggests mass loss from the ice-stream catchment that is of sufficient magnitude to reverse the gain estimated for today's Siple Coast region. Analysis of other ice streams would allow comparison of velocities over millennial time scales with observations of present-day velocities, useful for evaluating how West Antarctic ice drainage has evolved. |
format |
Article in Journal/Newspaper |
author |
Ng, F. Conway, H. |
spellingShingle |
Ng, F. Conway, H. Fast-flow signature in the stagnated Kamb Ice Stream, West Antarctica |
author_facet |
Ng, F. Conway, H. |
author_sort |
Ng, F. |
title |
Fast-flow signature in the stagnated Kamb Ice Stream, West Antarctica |
title_short |
Fast-flow signature in the stagnated Kamb Ice Stream, West Antarctica |
title_full |
Fast-flow signature in the stagnated Kamb Ice Stream, West Antarctica |
title_fullStr |
Fast-flow signature in the stagnated Kamb Ice Stream, West Antarctica |
title_full_unstemmed |
Fast-flow signature in the stagnated Kamb Ice Stream, West Antarctica |
title_sort |
fast-flow signature in the stagnated kamb ice stream, west antarctica |
publisher |
Geological Society of America |
publishDate |
2004 |
url |
https://eprints.whiterose.ac.uk/92154/ https://eprints.whiterose.ac.uk/92154/1/G20317_Ng_merged.pdf https://doi.org/10.1130/G20317.1 |
long_lat |
ENVELOPE(-83.917,-83.917,-75.917,-75.917) ENVELOPE(-155.000,-155.000,-82.000,-82.000) ENVELOPE(-145.000,-145.000,-82.250,-82.250) |
geographic |
Antarctic West Antarctica Siple Siple Coast Kamb Ice Stream |
geographic_facet |
Antarctic West Antarctica Siple Siple Coast Kamb Ice Stream |
genre |
Antarc* Antarctic Antarctica Ice Stream C Kamb Ice Stream West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Ice Stream C Kamb Ice Stream West Antarctica |
op_relation |
https://eprints.whiterose.ac.uk/92154/1/G20317_Ng_merged.pdf Ng, F. and Conway, H. (2004) Fast-flow signature in the stagnated Kamb Ice Stream, West Antarctica. Geology, 32 (6). 481 - 484. ISSN 0091-7613 |
op_doi |
https://doi.org/10.1130/G20317.1 |
container_title |
Geology |
container_volume |
32 |
container_issue |
6 |
container_start_page |
481 |
_version_ |
1766261220611981312 |