Modelling a paleo valley glacier network using a hybrid model: an assessment with a Stokes ice flow model ...
Modelling paleo-glacier networks in mountain ranges on the millennial timescales requires ice flow approximations. Hybrid models calculating ice flow by combining vertical shearing (shallow ice approximation) and longitudinal stretching (shallow shelf approximation) have been applied to model paleo-...
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Online Access: | https://dx.doi.org/10.3929/ethz-b-000398601 http://hdl.handle.net/20.500.11850/398601 |
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ftdatacite:10.3929/ethz-b-000398601 2024-04-28T08:24:57+00:00 Modelling a paleo valley glacier network using a hybrid model: an assessment with a Stokes ice flow model ... Imhof, Michael Cohen, Denis Seguinot, Julien Aschwanden, Andy Funk, Martin Jouvet, Guillaume 2019 application/pdf https://dx.doi.org/10.3929/ethz-b-000398601 http://hdl.handle.net/20.500.11850/398601 en eng ETH Zurich info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 mountain glaciers ice dynamics glacier mechanics glacier modelling article-journal Text ScholarlyArticle Journal Article 2019 ftdatacite https://doi.org/10.3929/ethz-b-000398601 2024-04-02T12:34:54Z Modelling paleo-glacier networks in mountain ranges on the millennial timescales requires ice flow approximations. Hybrid models calculating ice flow by combining vertical shearing (shallow ice approximation) and longitudinal stretching (shallow shelf approximation) have been applied to model paleo-glacier networks on steep terrain, yet their validity has not yet been assessed quantitatively. Moreover, hybrid models consistently yield higher ice thicknesses than Last Glacial Maximum geomorphological reconstructions in the European Alps. Here, we compare results based on the hybrid Parallel Ice Sheet Model (PISM) and the Stokes model Elmer/Ice on the Rhine Glacier, a catchment of the former European Alpine Icefield. For PISM, we also test two magnitudes of flux limitation in a scheme that reduces shearing velocities. We find that the flux limitation typically used in PISM yields significantly reduced shearing speeds and increases ice thicknesses by up to 500 m, partly explaining previous overestimations. ... : Journal of Glaciology, 65 (254) ... Article in Journal/Newspaper 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 |
English |
topic |
mountain glaciers ice dynamics glacier mechanics glacier modelling |
spellingShingle |
mountain glaciers ice dynamics glacier mechanics glacier modelling Imhof, Michael Cohen, Denis Seguinot, Julien Aschwanden, Andy Funk, Martin Jouvet, Guillaume Modelling a paleo valley glacier network using a hybrid model: an assessment with a Stokes ice flow model ... |
topic_facet |
mountain glaciers ice dynamics glacier mechanics glacier modelling |
description |
Modelling paleo-glacier networks in mountain ranges on the millennial timescales requires ice flow approximations. Hybrid models calculating ice flow by combining vertical shearing (shallow ice approximation) and longitudinal stretching (shallow shelf approximation) have been applied to model paleo-glacier networks on steep terrain, yet their validity has not yet been assessed quantitatively. Moreover, hybrid models consistently yield higher ice thicknesses than Last Glacial Maximum geomorphological reconstructions in the European Alps. Here, we compare results based on the hybrid Parallel Ice Sheet Model (PISM) and the Stokes model Elmer/Ice on the Rhine Glacier, a catchment of the former European Alpine Icefield. For PISM, we also test two magnitudes of flux limitation in a scheme that reduces shearing velocities. We find that the flux limitation typically used in PISM yields significantly reduced shearing speeds and increases ice thicknesses by up to 500 m, partly explaining previous overestimations. ... : Journal of Glaciology, 65 (254) ... |
format |
Article in Journal/Newspaper |
author |
Imhof, Michael Cohen, Denis Seguinot, Julien Aschwanden, Andy Funk, Martin Jouvet, Guillaume |
author_facet |
Imhof, Michael Cohen, Denis Seguinot, Julien Aschwanden, Andy Funk, Martin Jouvet, Guillaume |
author_sort |
Imhof, Michael |
title |
Modelling a paleo valley glacier network using a hybrid model: an assessment with a Stokes ice flow model ... |
title_short |
Modelling a paleo valley glacier network using a hybrid model: an assessment with a Stokes ice flow model ... |
title_full |
Modelling a paleo valley glacier network using a hybrid model: an assessment with a Stokes ice flow model ... |
title_fullStr |
Modelling a paleo valley glacier network using a hybrid model: an assessment with a Stokes ice flow model ... |
title_full_unstemmed |
Modelling a paleo valley glacier network using a hybrid model: an assessment with a Stokes ice flow model ... |
title_sort |
modelling a paleo valley glacier network using a hybrid model: an assessment with a stokes ice flow model ... |
publisher |
ETH Zurich |
publishDate |
2019 |
url |
https://dx.doi.org/10.3929/ethz-b-000398601 http://hdl.handle.net/20.500.11850/398601 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_doi |
https://doi.org/10.3929/ethz-b-000398601 |
_version_ |
1797584938948624384 |