a new fully three dimensional numerical model for ice dynamics
AbstractThe problem of describing ice dynamics has been faced by many researchers; in this paper a fully three-dimensional model for ice dynamics is presented and tested. Using an approach followed by other researchers, ice is considered a non-linear incompressible viscous fluid so that a fluid-dyna...
Published in: | Journal of Glaciology |
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Language: | English |
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2007
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Online Access: | https://www.openaccessrepository.it/record/58414 https://doi.org/10.3189/172756506781828629 |
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ftopenaccessrep:oai:zenodo.org:58414 2023-05-15T13:47:41+02:00 a new fully three dimensional numerical model for ice dynamics Alberto Deponti Vincenzo Pennati Lucia De Biase Valter Maggi Fabio Berta 2007-11-22 https://www.openaccessrepository.it/record/58414 https://doi.org/10.3189/172756506781828629 eng eng url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/58414 doi:10.3189/172756506781828629 info:eu-repo/semantics/openAccess Earth-Surface Processes info:eu-repo/semantics/article publication-article 2007 ftopenaccessrep https://doi.org/10.3189/172756506781828629 2022-11-23T06:47:10Z AbstractThe problem of describing ice dynamics has been faced by many researchers; in this paper a fully three-dimensional model for ice dynamics is presented and tested. Using an approach followed by other researchers, ice is considered a non-linear incompressible viscous fluid so that a fluid-dynamic approach can be used. The model is based on the full three-dimensional Stokes equations for the description of pressure and velocity fields, on the Saint-Venant equation for the description of the free-surface time evolution and on a constitutive law derived from Glen's law for the description of ice viscosity. The model computes the complete pressure field by considering both the hydrostatic and hydrodynamic pressure components; it is time-evolutive and uses high-order numerical approximation for equations and boundary conditions. Moreover it can deal with both constant and variable viscosity. Three theoretical tests and two applications to Priestley Glacier, Antarctica, are presented in order to evaluate the performance of the model and to investigate important phenomena of ice dynamics such as the influence of viscosity on pressure and velocity fields, basal sliding and flow over perturbed bedrocks. All these applications demonstrate the importance of treating the complete pressure and stress fields. Article in Journal/Newspaper Antarc* Antarctica Priestley Glacier Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository Priestley ENVELOPE(161.883,161.883,-75.183,-75.183) Priestley Glacier ENVELOPE(163.367,163.367,-74.333,-74.333) Journal of Glaciology 52 178 365 376 |
institution |
Open Polar |
collection |
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository |
op_collection_id |
ftopenaccessrep |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Alberto Deponti Vincenzo Pennati Lucia De Biase Valter Maggi Fabio Berta a new fully three dimensional numerical model for ice dynamics |
topic_facet |
Earth-Surface Processes |
description |
AbstractThe problem of describing ice dynamics has been faced by many researchers; in this paper a fully three-dimensional model for ice dynamics is presented and tested. Using an approach followed by other researchers, ice is considered a non-linear incompressible viscous fluid so that a fluid-dynamic approach can be used. The model is based on the full three-dimensional Stokes equations for the description of pressure and velocity fields, on the Saint-Venant equation for the description of the free-surface time evolution and on a constitutive law derived from Glen's law for the description of ice viscosity. The model computes the complete pressure field by considering both the hydrostatic and hydrodynamic pressure components; it is time-evolutive and uses high-order numerical approximation for equations and boundary conditions. Moreover it can deal with both constant and variable viscosity. Three theoretical tests and two applications to Priestley Glacier, Antarctica, are presented in order to evaluate the performance of the model and to investigate important phenomena of ice dynamics such as the influence of viscosity on pressure and velocity fields, basal sliding and flow over perturbed bedrocks. All these applications demonstrate the importance of treating the complete pressure and stress fields. |
format |
Article in Journal/Newspaper |
author |
Alberto Deponti Vincenzo Pennati Lucia De Biase Valter Maggi Fabio Berta |
author_facet |
Alberto Deponti Vincenzo Pennati Lucia De Biase Valter Maggi Fabio Berta |
author_sort |
Alberto Deponti |
title |
a new fully three dimensional numerical model for ice dynamics |
title_short |
a new fully three dimensional numerical model for ice dynamics |
title_full |
a new fully three dimensional numerical model for ice dynamics |
title_fullStr |
a new fully three dimensional numerical model for ice dynamics |
title_full_unstemmed |
a new fully three dimensional numerical model for ice dynamics |
title_sort |
new fully three dimensional numerical model for ice dynamics |
publishDate |
2007 |
url |
https://www.openaccessrepository.it/record/58414 https://doi.org/10.3189/172756506781828629 |
long_lat |
ENVELOPE(161.883,161.883,-75.183,-75.183) ENVELOPE(163.367,163.367,-74.333,-74.333) |
geographic |
Priestley Priestley Glacier |
geographic_facet |
Priestley Priestley Glacier |
genre |
Antarc* Antarctica Priestley Glacier |
genre_facet |
Antarc* Antarctica Priestley Glacier |
op_relation |
url:https://www.openaccessrepository.it/communities/itmirror https://www.openaccessrepository.it/record/58414 doi:10.3189/172756506781828629 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3189/172756506781828629 |
container_title |
Journal of Glaciology |
container_volume |
52 |
container_issue |
178 |
container_start_page |
365 |
op_container_end_page |
376 |
_version_ |
1766247674776911872 |