Interpretation of radar-detected internal layer folding in West Antarctic ice streams
Abstract Low-frequency surface-based radar-profiling experiments on Ice Streams Β and C, West Antarctica, have yielded high-resolution images which depict folding of the internal layers that can aid in the interpretation of ice-stream dynamics. Unlike folding seen in most earlier radar studies of ic...
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Cambridge University Press (CUP)
1993
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Online Access: | http://dx.doi.org/10.1017/s0022143000016427 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000016427 |
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crcambridgeupr:10.1017/s0022143000016427 2024-09-15T17:48:40+00:00 Interpretation of radar-detected internal layer folding in West Antarctic ice streams Robert, W. Jacobel Anthony, M. Gades David, L. Gottschling Steven, M. Hodge David, L. Wright 1993 http://dx.doi.org/10.1017/s0022143000016427 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000016427 en eng Cambridge University Press (CUP) Journal of Glaciology volume 39, issue 133, page 528-537 ISSN 0022-1430 1727-5652 journal-article 1993 crcambridgeupr https://doi.org/10.1017/s0022143000016427 2024-07-31T04:04:04Z Abstract Low-frequency surface-based radar-profiling experiments on Ice Streams Β and C, West Antarctica, have yielded high-resolution images which depict folding of the internal layers that can aid in the interpretation of ice-stream dynamics. Unlike folding seen in most earlier radar studies of ice sheets, the present structures have no relationship to bedrock topography and show tilting of their axial fold planes in the flow direction. Rather than being standing waves created by topography or local variations in basal shear stress, the data show that these folds originate upstream of the region of streaming flow and are advected into the ice streams. The mechanism for producing folds is hypothesized to be changes in the basal boundary conditions as the ice makes the transition from inland ice to ice-stream flow. Migration of this transition zone headward can then cause folds in the internal layering to be propagated down the ice streams. Article in Journal/Newspaper Antarc* Antarctic Antarctica Journal of Glaciology West Antarctica Cambridge University Press Journal of Glaciology 39 133 528 537 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract Low-frequency surface-based radar-profiling experiments on Ice Streams Β and C, West Antarctica, have yielded high-resolution images which depict folding of the internal layers that can aid in the interpretation of ice-stream dynamics. Unlike folding seen in most earlier radar studies of ice sheets, the present structures have no relationship to bedrock topography and show tilting of their axial fold planes in the flow direction. Rather than being standing waves created by topography or local variations in basal shear stress, the data show that these folds originate upstream of the region of streaming flow and are advected into the ice streams. The mechanism for producing folds is hypothesized to be changes in the basal boundary conditions as the ice makes the transition from inland ice to ice-stream flow. Migration of this transition zone headward can then cause folds in the internal layering to be propagated down the ice streams. |
format |
Article in Journal/Newspaper |
author |
Robert, W. Jacobel Anthony, M. Gades David, L. Gottschling Steven, M. Hodge David, L. Wright |
spellingShingle |
Robert, W. Jacobel Anthony, M. Gades David, L. Gottschling Steven, M. Hodge David, L. Wright Interpretation of radar-detected internal layer folding in West Antarctic ice streams |
author_facet |
Robert, W. Jacobel Anthony, M. Gades David, L. Gottschling Steven, M. Hodge David, L. Wright |
author_sort |
Robert, W. Jacobel |
title |
Interpretation of radar-detected internal layer folding in West Antarctic ice streams |
title_short |
Interpretation of radar-detected internal layer folding in West Antarctic ice streams |
title_full |
Interpretation of radar-detected internal layer folding in West Antarctic ice streams |
title_fullStr |
Interpretation of radar-detected internal layer folding in West Antarctic ice streams |
title_full_unstemmed |
Interpretation of radar-detected internal layer folding in West Antarctic ice streams |
title_sort |
interpretation of radar-detected internal layer folding in west antarctic ice streams |
publisher |
Cambridge University Press (CUP) |
publishDate |
1993 |
url |
http://dx.doi.org/10.1017/s0022143000016427 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000016427 |
genre |
Antarc* Antarctic Antarctica Journal of Glaciology West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Journal of Glaciology West Antarctica |
op_source |
Journal of Glaciology volume 39, issue 133, page 528-537 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000016427 |
container_title |
Journal of Glaciology |
container_volume |
39 |
container_issue |
133 |
container_start_page |
528 |
op_container_end_page |
537 |
_version_ |
1810290148785520640 |