Coupled solid Earth – Antarctic ice sheet simulations with VILMA and PISM
The Antarctic Ice Sheet rests on a bed that is characterized by tectonical activity and hence by a heterogeneous rheology. Spots of extremely weak lithosphere structure could have strong impacts on the Glacial Isostatic Adjustment and hence on the stability of the ice sheet, possibly also for confin...
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5009156 2023-05-15T14:02:24+02:00 Coupled solid Earth – Antarctic ice sheet simulations with VILMA and PISM Albrecht, T. Bagge, M. Winkelmann, R. Klemann, V. 2021 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5009156 eng eng info:eu-repo/semantics/altIdentifier/doi/10.5194/egusphere-egu21-8050 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5009156 Abstracts info:eu-repo/semantics/conferenceObject 2021 ftgfzpotsdam https://doi.org/10.5194/egusphere-egu21-8050 2022-09-14T05:57:59Z The Antarctic Ice Sheet rests on a bed that is characterized by tectonical activity and hence by a heterogeneous rheology. Spots of extremely weak lithosphere structure could have strong impacts on the Glacial Isostatic Adjustment and hence on the stability of the ice sheet, possibly also for confined glacier regions and on timescales of decades down to even years (Barletta et al., 2018). We coupled the VIscoelastic Lithosphere and MAntle model (VILMA) to the Parallel Ice Sheet Model (PISM) and ran simulations over the last two glacial cycles. In this framework, VILMA considers both viscoelastic deformations of the solid Earth and gravitationally consistent mass redistribution in the ocean by solving for the sea-level equation (Martinec et al., 2018). In turn, PISM interprets this as a vertical shift in bed topography that directly affects the stress balance within the ice sheet and hence the grounding line dynamics at the interface of ice, ocean and bedrock. Here we present first results of the coupled Antarctic glacial-cycle simulations and investigate technical aspects, such as optimal coupling time steps, iteration schemes and convergence, for both one-dimensional and three-dimensional Earth structures. This project is part of the German Climate Modeling Initiative, PalMod2. Conference Object Antarc* Antarctic Ice Sheet GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Antarctic The Antarctic |
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Open Polar |
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GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
English |
description |
The Antarctic Ice Sheet rests on a bed that is characterized by tectonical activity and hence by a heterogeneous rheology. Spots of extremely weak lithosphere structure could have strong impacts on the Glacial Isostatic Adjustment and hence on the stability of the ice sheet, possibly also for confined glacier regions and on timescales of decades down to even years (Barletta et al., 2018). We coupled the VIscoelastic Lithosphere and MAntle model (VILMA) to the Parallel Ice Sheet Model (PISM) and ran simulations over the last two glacial cycles. In this framework, VILMA considers both viscoelastic deformations of the solid Earth and gravitationally consistent mass redistribution in the ocean by solving for the sea-level equation (Martinec et al., 2018). In turn, PISM interprets this as a vertical shift in bed topography that directly affects the stress balance within the ice sheet and hence the grounding line dynamics at the interface of ice, ocean and bedrock. Here we present first results of the coupled Antarctic glacial-cycle simulations and investigate technical aspects, such as optimal coupling time steps, iteration schemes and convergence, for both one-dimensional and three-dimensional Earth structures. This project is part of the German Climate Modeling Initiative, PalMod2. |
format |
Conference Object |
author |
Albrecht, T. Bagge, M. Winkelmann, R. Klemann, V. |
spellingShingle |
Albrecht, T. Bagge, M. Winkelmann, R. Klemann, V. Coupled solid Earth – Antarctic ice sheet simulations with VILMA and PISM |
author_facet |
Albrecht, T. Bagge, M. Winkelmann, R. Klemann, V. |
author_sort |
Albrecht, T. |
title |
Coupled solid Earth – Antarctic ice sheet simulations with VILMA and PISM |
title_short |
Coupled solid Earth – Antarctic ice sheet simulations with VILMA and PISM |
title_full |
Coupled solid Earth – Antarctic ice sheet simulations with VILMA and PISM |
title_fullStr |
Coupled solid Earth – Antarctic ice sheet simulations with VILMA and PISM |
title_full_unstemmed |
Coupled solid Earth – Antarctic ice sheet simulations with VILMA and PISM |
title_sort |
coupled solid earth – antarctic ice sheet simulations with vilma and pism |
publishDate |
2021 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5009156 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_source |
Abstracts |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/egusphere-egu21-8050 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5009156 |
op_doi |
https://doi.org/10.5194/egusphere-egu21-8050 |
_version_ |
1766272663150395392 |