Resolution-dependent performance of grounding line motion in a shallow model compared to a full-Stokes model according to the MISMIP3d intercomparison
Making confident statements about the evolution of an ice-sheet-shelf system with a numerical model requires the capability to reproduce the migration of the grounding line. Here we show that the shallow-ice approximation/shallow- shelf approximation hybrid-type Parallel Ice Sheet Model (PISM), with...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/171835 2023-05-15T13:37:29+02:00 Resolution-dependent performance of grounding line motion in a shallow model compared to a full-Stokes model according to the MISMIP3d intercomparison Feldmann, J. Albrecht, Torsten Khroulev, C. Pattyn, Frank Levermann, A. 2014-04 1 full-text file(s): application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/171835 https://dipot.ulb.ac.be/dspace/bitstream/2013/171835/3/doi_155465.pdf en eng uri/info:doi/10.3189/2014JoG13J093 uri/info:scp/84901633993 https://dipot.ulb.ac.be/dspace/bitstream/2013/171835/3/doi_155465.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/171835 1 full-text file(s): info:eu-repo/semantics/restrictedAccess Journal of Glaciology, 60 (220 Glaciologie info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2014 ftunivbruxelles 2022-06-12T22:09:17Z Making confident statements about the evolution of an ice-sheet-shelf system with a numerical model requires the capability to reproduce the migration of the grounding line. Here we show that the shallow-ice approximation/shallow- shelf approximation hybrid-type Parallel Ice Sheet Model (PISM), with its recent improvements, is capable of modeling the grounding line motion in a perturbed ice-sheet-shelf system. The model is set up according to the three-dimensional Marine Ice-Sheet Model Intercomparison Project (MISMIP3d), and simulations are carried out across a broad range of spatial resolutions. Using (1) a linear interpolation of the grounding line with locally interpolated basal friction and (2) an improved driving-stress computation across the grounding line, the reversibility of the grounding line (i.e. its retreat after an advance forced by a local perturbation of basal resistance) is captured by the model even at medium and low resolutions (δ > 10 km). The transient model response is qualitatively similar to that of higher-order models but reveals a higher initial sensitivity to perturbations on very short timescales. Our findings support the application of PISM to the Antarctic ice sheet from regional up to continental scales and on relatively low spatial resolutions. SCOPUS: ar.j info:eu-repo/semantics/published Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Journal of Glaciology DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) Antarctic The Antarctic |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Glaciologie |
spellingShingle |
Glaciologie Feldmann, J. Albrecht, Torsten Khroulev, C. Pattyn, Frank Levermann, A. Resolution-dependent performance of grounding line motion in a shallow model compared to a full-Stokes model according to the MISMIP3d intercomparison |
topic_facet |
Glaciologie |
description |
Making confident statements about the evolution of an ice-sheet-shelf system with a numerical model requires the capability to reproduce the migration of the grounding line. Here we show that the shallow-ice approximation/shallow- shelf approximation hybrid-type Parallel Ice Sheet Model (PISM), with its recent improvements, is capable of modeling the grounding line motion in a perturbed ice-sheet-shelf system. The model is set up according to the three-dimensional Marine Ice-Sheet Model Intercomparison Project (MISMIP3d), and simulations are carried out across a broad range of spatial resolutions. Using (1) a linear interpolation of the grounding line with locally interpolated basal friction and (2) an improved driving-stress computation across the grounding line, the reversibility of the grounding line (i.e. its retreat after an advance forced by a local perturbation of basal resistance) is captured by the model even at medium and low resolutions (δ > 10 km). The transient model response is qualitatively similar to that of higher-order models but reveals a higher initial sensitivity to perturbations on very short timescales. Our findings support the application of PISM to the Antarctic ice sheet from regional up to continental scales and on relatively low spatial resolutions. SCOPUS: ar.j info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Feldmann, J. Albrecht, Torsten Khroulev, C. Pattyn, Frank Levermann, A. |
author_facet |
Feldmann, J. Albrecht, Torsten Khroulev, C. Pattyn, Frank Levermann, A. |
author_sort |
Feldmann, J. |
title |
Resolution-dependent performance of grounding line motion in a shallow model compared to a full-Stokes model according to the MISMIP3d intercomparison |
title_short |
Resolution-dependent performance of grounding line motion in a shallow model compared to a full-Stokes model according to the MISMIP3d intercomparison |
title_full |
Resolution-dependent performance of grounding line motion in a shallow model compared to a full-Stokes model according to the MISMIP3d intercomparison |
title_fullStr |
Resolution-dependent performance of grounding line motion in a shallow model compared to a full-Stokes model according to the MISMIP3d intercomparison |
title_full_unstemmed |
Resolution-dependent performance of grounding line motion in a shallow model compared to a full-Stokes model according to the MISMIP3d intercomparison |
title_sort |
resolution-dependent performance of grounding line motion in a shallow model compared to a full-stokes model according to the mismip3d intercomparison |
publishDate |
2014 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/171835 https://dipot.ulb.ac.be/dspace/bitstream/2013/171835/3/doi_155465.pdf |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Ice Sheet Journal of Glaciology |
genre_facet |
Antarc* Antarctic Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology, 60 (220 |
op_relation |
uri/info:doi/10.3189/2014JoG13J093 uri/info:scp/84901633993 https://dipot.ulb.ac.be/dspace/bitstream/2013/171835/3/doi_155465.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/171835 |
op_rights |
1 full-text file(s): info:eu-repo/semantics/restrictedAccess |
_version_ |
1766092527680618496 |