Ice-Shelf Flexure and Tidal Forcing of Bindschadler Ice Stream, West Antarctica
Viscoelastic models of ice-shelf flexure and ice-stream velocity perturbations are combined into a single efficient flowline model to study tidal forcing of grounded ice. The magnitude and timing of icestream response to tidally driven changes in hydrostatic pressure and/or basal drag are found to d...
Main Authors: | , , , , |
---|---|
Format: | Other/Unknown Material |
Language: | unknown |
Published: |
2014
|
Subjects: | |
Online Access: | http://hdl.handle.net/2060/20140010302 |
id |
ftnasantrs:oai:casi.ntrs.nasa.gov:20140010302 |
---|---|
record_format |
openpolar |
spelling |
ftnasantrs:oai:casi.ntrs.nasa.gov:20140010302 2023-05-15T13:33:56+02:00 Ice-Shelf Flexure and Tidal Forcing of Bindschadler Ice Stream, West Antarctica Parizek, Bryron R. Anandakrishnan, Sridhar Walker, Ryan T. Brunt, Kelly M. Alley, Richard B. Unclassified, Unlimited, Publicly available June 1, 2014 application/pdf http://hdl.handle.net/2060/20140010302 unknown Document ID: 20140010302 http://hdl.handle.net/2060/20140010302 Copyright, Distribution under U.S. Government purpose rights CASI Oceanography GSFC-E-DAA-TN14540 Earth and Planetary Science Letters; 395; 184-193 2014 ftnasantrs 2019-07-21T00:27:46Z Viscoelastic models of ice-shelf flexure and ice-stream velocity perturbations are combined into a single efficient flowline model to study tidal forcing of grounded ice. The magnitude and timing of icestream response to tidally driven changes in hydrostatic pressure and/or basal drag are found to depend significantly on bed rheology, with only a perfectly plastic bed allowing instantaneous velocity response at the grounding line. The model can reasonably reproduce GPS observations near the grounding zone of Bindschadler Ice Stream (formerly Ice Stream D) on semidiurnal time scales; however, other forcings such as tidally driven ice-shelf slope transverse to the flowline and flexurally driven till deformation must also be considered if diurnal motion is to be matched Other/Unknown Material Antarc* Antarctica Bindschadler Ice Stream Ice Shelf Ice Stream D West Antarctica NASA Technical Reports Server (NTRS) Bindschadler Ice Stream ENVELOPE(-142.000,-142.000,-81.000,-81.000) West Antarctica |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
Oceanography |
spellingShingle |
Oceanography Parizek, Bryron R. Anandakrishnan, Sridhar Walker, Ryan T. Brunt, Kelly M. Alley, Richard B. Ice-Shelf Flexure and Tidal Forcing of Bindschadler Ice Stream, West Antarctica |
topic_facet |
Oceanography |
description |
Viscoelastic models of ice-shelf flexure and ice-stream velocity perturbations are combined into a single efficient flowline model to study tidal forcing of grounded ice. The magnitude and timing of icestream response to tidally driven changes in hydrostatic pressure and/or basal drag are found to depend significantly on bed rheology, with only a perfectly plastic bed allowing instantaneous velocity response at the grounding line. The model can reasonably reproduce GPS observations near the grounding zone of Bindschadler Ice Stream (formerly Ice Stream D) on semidiurnal time scales; however, other forcings such as tidally driven ice-shelf slope transverse to the flowline and flexurally driven till deformation must also be considered if diurnal motion is to be matched |
format |
Other/Unknown Material |
author |
Parizek, Bryron R. Anandakrishnan, Sridhar Walker, Ryan T. Brunt, Kelly M. Alley, Richard B. |
author_facet |
Parizek, Bryron R. Anandakrishnan, Sridhar Walker, Ryan T. Brunt, Kelly M. Alley, Richard B. |
author_sort |
Parizek, Bryron R. |
title |
Ice-Shelf Flexure and Tidal Forcing of Bindschadler Ice Stream, West Antarctica |
title_short |
Ice-Shelf Flexure and Tidal Forcing of Bindschadler Ice Stream, West Antarctica |
title_full |
Ice-Shelf Flexure and Tidal Forcing of Bindschadler Ice Stream, West Antarctica |
title_fullStr |
Ice-Shelf Flexure and Tidal Forcing of Bindschadler Ice Stream, West Antarctica |
title_full_unstemmed |
Ice-Shelf Flexure and Tidal Forcing of Bindschadler Ice Stream, West Antarctica |
title_sort |
ice-shelf flexure and tidal forcing of bindschadler ice stream, west antarctica |
publishDate |
2014 |
url |
http://hdl.handle.net/2060/20140010302 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(-142.000,-142.000,-81.000,-81.000) |
geographic |
Bindschadler Ice Stream West Antarctica |
geographic_facet |
Bindschadler Ice Stream West Antarctica |
genre |
Antarc* Antarctica Bindschadler Ice Stream Ice Shelf Ice Stream D West Antarctica |
genre_facet |
Antarc* Antarctica Bindschadler Ice Stream Ice Shelf Ice Stream D West Antarctica |
op_source |
CASI |
op_relation |
Document ID: 20140010302 http://hdl.handle.net/2060/20140010302 |
op_rights |
Copyright, Distribution under U.S. Government purpose rights |
_version_ |
1766047240169717760 |