The deformational response of a viscoelastic solid Earth model coupled to a thermomechanical ice sheet model
We apply a coupled thermomechanical ice sheet—self-gravitating viscoelastic solid Earth model (SGVEM), allowing for the dynamic exchange of ice thickness and bedrock deformation, in order to investigate the effect of viscoelastic deformation on ice dynamics and vice versa. In a synthetic glaciation...
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ftawi:oai:epic.awi.de:34257 2023-05-15T16:39:44+02:00 The deformational response of a viscoelastic solid Earth model coupled to a thermomechanical ice sheet model Konrad, Hannes Thoma, Malte Sasgen, Ingo Klemann, Volker Grosfeld, Klaus Barbi, Dirk Martinec, Zdenĕk 2013-11 https://epic.awi.de/id/eprint/34257/ http://link.springer.com/article/10.1007%2Fs10712-013-9257-8 https://hdl.handle.net/10013/epic.42657 unknown SPRINGER Konrad, H. , Thoma, M. orcid:0000-0002-4033-3905 , Sasgen, I. orcid:0000-0002-8993-0989 , Klemann, V. , Grosfeld, K. orcid:0000-0001-5936-179X , Barbi, D. orcid:0000-0002-5053-1788 and Martinec, Z. (2013) The deformational response of a viscoelastic solid Earth model coupled to a thermomechanical ice sheet model , Surveys in Geophysics . doi:10.1007/s10712-013-9257-8 <https://doi.org/10.1007/s10712-013-9257-8> , hdl:10013/epic.42657 EPIC3Surveys in Geophysics, SPRINGER, ISSN: 0169-3298 Article isiRev 2013 ftawi https://doi.org/10.1007/s10712-013-9257-8 2021-12-24T15:39:04Z We apply a coupled thermomechanical ice sheet—self-gravitating viscoelastic solid Earth model (SGVEM), allowing for the dynamic exchange of ice thickness and bedrock deformation, in order to investigate the effect of viscoelastic deformation on ice dynamics and vice versa. In a synthetic glaciation scenario, we investigate the interaction between the ice sheet and the solid Earth deformation, the glacial-isostatic adjustment (GIA), accounting for an atmospheric forcing depending on the ice sheet surface altitude. We compare the results from the coupled model to runs with the common elastic lithosphere/relaxing asthenosphere (ELRA) model, where the lithosphere is represented by a thin plate and the mantle relaxes with one characteristic relaxation time, as well as to a rigid Earth without any deformation. We find that the deformational behaviour of the SGVEM on ice dynamics (i.e. stored ice volume, ice thickness and velocity field) is comparable to the ELRA for an optimal choice of the parameters in steady state, but exhibits differences in the transient behaviour. Beyond the ice sheet, in the region of peripheral forebulge, the differences in the transient surface deformation between ELRA and SGVEM are substantial, demonstrating the inadequacy of the ELRA model for interpreting constraints on GIA in the periphery of the ice sheet, such as sea-level indicators and GPS uplift rates. Article in Journal/Newspaper Ice Sheet Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Surveys in Geophysics 35 6 1441 1458 |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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We apply a coupled thermomechanical ice sheet—self-gravitating viscoelastic solid Earth model (SGVEM), allowing for the dynamic exchange of ice thickness and bedrock deformation, in order to investigate the effect of viscoelastic deformation on ice dynamics and vice versa. In a synthetic glaciation scenario, we investigate the interaction between the ice sheet and the solid Earth deformation, the glacial-isostatic adjustment (GIA), accounting for an atmospheric forcing depending on the ice sheet surface altitude. We compare the results from the coupled model to runs with the common elastic lithosphere/relaxing asthenosphere (ELRA) model, where the lithosphere is represented by a thin plate and the mantle relaxes with one characteristic relaxation time, as well as to a rigid Earth without any deformation. We find that the deformational behaviour of the SGVEM on ice dynamics (i.e. stored ice volume, ice thickness and velocity field) is comparable to the ELRA for an optimal choice of the parameters in steady state, but exhibits differences in the transient behaviour. Beyond the ice sheet, in the region of peripheral forebulge, the differences in the transient surface deformation between ELRA and SGVEM are substantial, demonstrating the inadequacy of the ELRA model for interpreting constraints on GIA in the periphery of the ice sheet, such as sea-level indicators and GPS uplift rates. |
format |
Article in Journal/Newspaper |
author |
Konrad, Hannes Thoma, Malte Sasgen, Ingo Klemann, Volker Grosfeld, Klaus Barbi, Dirk Martinec, Zdenĕk |
spellingShingle |
Konrad, Hannes Thoma, Malte Sasgen, Ingo Klemann, Volker Grosfeld, Klaus Barbi, Dirk Martinec, Zdenĕk The deformational response of a viscoelastic solid Earth model coupled to a thermomechanical ice sheet model |
author_facet |
Konrad, Hannes Thoma, Malte Sasgen, Ingo Klemann, Volker Grosfeld, Klaus Barbi, Dirk Martinec, Zdenĕk |
author_sort |
Konrad, Hannes |
title |
The deformational response of a viscoelastic solid Earth model coupled to a thermomechanical ice sheet model |
title_short |
The deformational response of a viscoelastic solid Earth model coupled to a thermomechanical ice sheet model |
title_full |
The deformational response of a viscoelastic solid Earth model coupled to a thermomechanical ice sheet model |
title_fullStr |
The deformational response of a viscoelastic solid Earth model coupled to a thermomechanical ice sheet model |
title_full_unstemmed |
The deformational response of a viscoelastic solid Earth model coupled to a thermomechanical ice sheet model |
title_sort |
deformational response of a viscoelastic solid earth model coupled to a thermomechanical ice sheet model |
publisher |
SPRINGER |
publishDate |
2013 |
url |
https://epic.awi.de/id/eprint/34257/ http://link.springer.com/article/10.1007%2Fs10712-013-9257-8 https://hdl.handle.net/10013/epic.42657 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
EPIC3Surveys in Geophysics, SPRINGER, ISSN: 0169-3298 |
op_relation |
Konrad, H. , Thoma, M. orcid:0000-0002-4033-3905 , Sasgen, I. orcid:0000-0002-8993-0989 , Klemann, V. , Grosfeld, K. orcid:0000-0001-5936-179X , Barbi, D. orcid:0000-0002-5053-1788 and Martinec, Z. (2013) The deformational response of a viscoelastic solid Earth model coupled to a thermomechanical ice sheet model , Surveys in Geophysics . doi:10.1007/s10712-013-9257-8 <https://doi.org/10.1007/s10712-013-9257-8> , hdl:10013/epic.42657 |
op_doi |
https://doi.org/10.1007/s10712-013-9257-8 |
container_title |
Surveys in Geophysics |
container_volume |
35 |
container_issue |
6 |
container_start_page |
1441 |
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1458 |
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1766030068421754880 |