ICE-SHELF RESPONSE TO ICE-STREAM DISCHARGE FLUCTUATIONS: 11. IDEAL RECTANGULAR ICE SHELF
ABSTRACT. Ice-shelf thickness and velocity anomalies resulting from ice-stream discharge fluctuations are calculated for an ideal ice shelf fed by a single ice stream and confined within a rectangular coastal geometry. Ice-shelf response to periodic forcing is found to be linear (thickness and veloc...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.429.6534 2023-05-15T16:41:43+02:00 ICE-SHELF RESPONSE TO ICE-STREAM DISCHARGE FLUCTUATIONS: 11. IDEAL RECTANGULAR ICE SHELF R. Mac A Yeal Manfred A. Lange The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.429.6534 http://www.igsoc.org/journal/34/116/igs_journal_vol34_issue116_pg128-135.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.429.6534 http://www.igsoc.org/journal/34/116/igs_journal_vol34_issue116_pg128-135.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.igsoc.org/journal/34/116/igs_journal_vol34_issue116_pg128-135.pdf text ftciteseerx 2016-01-08T04:32:07Z ABSTRACT. Ice-shelf thickness and velocity anomalies resulting from ice-stream discharge fluctuations are calculated for an ideal ice shelf fed by a single ice stream and confined within a rectangular coastal geometry. Ice-shelf response to periodic forcing is found to be linear (thickness and velocity anomalies oscillate at the forcing frequency, and response scales with the forcing). Thickness anomalies are trapped near the ice-stream outlet and propagate down-stream at a slow, advective time-scale. Velocity anomalies tend to be widespread and propagate instantaneously throughout the ice-shelf environment. Ice-shelf response is senSItIve to ice-stream fluctuation time-scale in the manner of a low-pass filter; longer forcing time-scales produce more widespread ice-shelf response. If ice-stream velocity and thickness fluctuations are in phase, thickness-anomaly maxima typically occur down-stream of the ice-stream outlet. This effect may determine where ice rumples and rises are likely to form in response to stochastic ice-stream variability. Text Ice Shelf Unknown |
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Open Polar |
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ftciteseerx |
language |
English |
description |
ABSTRACT. Ice-shelf thickness and velocity anomalies resulting from ice-stream discharge fluctuations are calculated for an ideal ice shelf fed by a single ice stream and confined within a rectangular coastal geometry. Ice-shelf response to periodic forcing is found to be linear (thickness and velocity anomalies oscillate at the forcing frequency, and response scales with the forcing). Thickness anomalies are trapped near the ice-stream outlet and propagate down-stream at a slow, advective time-scale. Velocity anomalies tend to be widespread and propagate instantaneously throughout the ice-shelf environment. Ice-shelf response is senSItIve to ice-stream fluctuation time-scale in the manner of a low-pass filter; longer forcing time-scales produce more widespread ice-shelf response. If ice-stream velocity and thickness fluctuations are in phase, thickness-anomaly maxima typically occur down-stream of the ice-stream outlet. This effect may determine where ice rumples and rises are likely to form in response to stochastic ice-stream variability. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
R. Mac A Yeal Manfred A. Lange |
spellingShingle |
R. Mac A Yeal Manfred A. Lange ICE-SHELF RESPONSE TO ICE-STREAM DISCHARGE FLUCTUATIONS: 11. IDEAL RECTANGULAR ICE SHELF |
author_facet |
R. Mac A Yeal Manfred A. Lange |
author_sort |
R. Mac |
title |
ICE-SHELF RESPONSE TO ICE-STREAM DISCHARGE FLUCTUATIONS: 11. IDEAL RECTANGULAR ICE SHELF |
title_short |
ICE-SHELF RESPONSE TO ICE-STREAM DISCHARGE FLUCTUATIONS: 11. IDEAL RECTANGULAR ICE SHELF |
title_full |
ICE-SHELF RESPONSE TO ICE-STREAM DISCHARGE FLUCTUATIONS: 11. IDEAL RECTANGULAR ICE SHELF |
title_fullStr |
ICE-SHELF RESPONSE TO ICE-STREAM DISCHARGE FLUCTUATIONS: 11. IDEAL RECTANGULAR ICE SHELF |
title_full_unstemmed |
ICE-SHELF RESPONSE TO ICE-STREAM DISCHARGE FLUCTUATIONS: 11. IDEAL RECTANGULAR ICE SHELF |
title_sort |
ice-shelf response to ice-stream discharge fluctuations: 11. ideal rectangular ice shelf |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.429.6534 http://www.igsoc.org/journal/34/116/igs_journal_vol34_issue116_pg128-135.pdf |
genre |
Ice Shelf |
genre_facet |
Ice Shelf |
op_source |
http://www.igsoc.org/journal/34/116/igs_journal_vol34_issue116_pg128-135.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.429.6534 http://www.igsoc.org/journal/34/116/igs_journal_vol34_issue116_pg128-135.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766032180802224128 |