The shallow shelf approximation as a "sliding law" in a thermomechanically coupled ice sheet model

The shallow shelf approximation is a better ``sliding law'' for ice sheet modeling than those sliding laws in which basal velocity is a function of driving stress. The shallow shelf approximation as formulated by \emph{Schoof} [2006a] is well-suited to this use. Our new thermomechanically...

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Main Authors: Bueler, Ed, Brown, Jed
Format: Text
Language:unknown
Published: arXiv 2008
Subjects:
Geophysics physics.geo-ph
FOS Physical sciences
Ice Sheet
Online Access:https://dx.doi.org/10.48550/arxiv.0810.3449
https://arxiv.org/abs/0810.3449
id ftdatacite:10.48550/arxiv.0810.3449
record_format openpolar
spelling ftdatacite:10.48550/arxiv.0810.3449 2023-05-15T16:39:52+02:00 The shallow shelf approximation as a "sliding law" in a thermomechanically coupled ice sheet model Bueler, Ed Brown, Jed 2008 https://dx.doi.org/10.48550/arxiv.0810.3449 https://arxiv.org/abs/0810.3449 unknown arXiv https://dx.doi.org/10.1029/2008jf001179 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Geophysics physics.geo-ph FOS Physical sciences article-journal Article ScholarlyArticle Text 2008 ftdatacite https://doi.org/10.48550/arxiv.0810.3449 https://doi.org/10.1029/2008jf001179 2022-04-01T15:15:15Z The shallow shelf approximation is a better ``sliding law'' for ice sheet modeling than those sliding laws in which basal velocity is a function of driving stress. The shallow shelf approximation as formulated by \emph{Schoof} [2006a] is well-suited to this use. Our new thermomechanically coupled sliding scheme is based on a plasticity assumption about the strength of the saturated till underlying the ice sheet in which the till yield stress is given by a Mohr-Coulomb formula using a modeled pore water pressure. Using this scheme, our prognostic whole ice sheet model has convincing ice streams. Driving stress is balanced in part by membrane stresses, the model is computable at high spatial resolution in parallel, it is stable with respect to parameter changes, and it produces surface velocities seen in actual ice streams. : 12 pages of text; 4 tables; 27 figures; submitted to JGR Earth Surface Text Ice Sheet DataCite Metadata Store (German National Library of Science and Technology)
institution Open Polar
collection DataCite Metadata Store (German National Library of Science and Technology)
op_collection_id ftdatacite
language unknown
topic Geophysics physics.geo-ph
FOS Physical sciences
spellingShingle Geophysics physics.geo-ph
FOS Physical sciences
Bueler, Ed
Brown, Jed
The shallow shelf approximation as a "sliding law" in a thermomechanically coupled ice sheet model
topic_facet Geophysics physics.geo-ph
FOS Physical sciences
description The shallow shelf approximation is a better ``sliding law'' for ice sheet modeling than those sliding laws in which basal velocity is a function of driving stress. The shallow shelf approximation as formulated by \emph{Schoof} [2006a] is well-suited to this use. Our new thermomechanically coupled sliding scheme is based on a plasticity assumption about the strength of the saturated till underlying the ice sheet in which the till yield stress is given by a Mohr-Coulomb formula using a modeled pore water pressure. Using this scheme, our prognostic whole ice sheet model has convincing ice streams. Driving stress is balanced in part by membrane stresses, the model is computable at high spatial resolution in parallel, it is stable with respect to parameter changes, and it produces surface velocities seen in actual ice streams. : 12 pages of text; 4 tables; 27 figures; submitted to JGR Earth Surface
format Text
author Bueler, Ed
Brown, Jed
author_facet Bueler, Ed
Brown, Jed
author_sort Bueler, Ed
title The shallow shelf approximation as a "sliding law" in a thermomechanically coupled ice sheet model
title_short The shallow shelf approximation as a "sliding law" in a thermomechanically coupled ice sheet model
title_full The shallow shelf approximation as a "sliding law" in a thermomechanically coupled ice sheet model
title_fullStr The shallow shelf approximation as a "sliding law" in a thermomechanically coupled ice sheet model
title_full_unstemmed The shallow shelf approximation as a "sliding law" in a thermomechanically coupled ice sheet model
title_sort shallow shelf approximation as a "sliding law" in a thermomechanically coupled ice sheet model
publisher arXiv
publishDate 2008
url https://dx.doi.org/10.48550/arxiv.0810.3449
https://arxiv.org/abs/0810.3449
genre Ice Sheet
genre_facet Ice Sheet
op_relation https://dx.doi.org/10.1029/2008jf001179
op_rights arXiv.org perpetual, non-exclusive license
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
op_doi https://doi.org/10.48550/arxiv.0810.3449
https://doi.org/10.1029/2008jf001179
_version_ 1766030213124194304

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