A comparison of two Stokes ice sheet models applied to the Marine Ice Sheet Model Intercomparison Project for plan view models (MISMIP3d)
Here, we present a comparison of the numerics and simulation results for two "full" Stokes ice sheet models, FELIX-S (Leng et al. 2012) and Elmer/Ice. The models are applied to the Marine Ice Sheet Model Intercomparison Project for plan view models (MISMIP3d). For the diagnostic experiment...
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ftosti:oai:osti.gov:1342858 2023-07-30T04:04:11+02:00 A comparison of two Stokes ice sheet models applied to the Marine Ice Sheet Model Intercomparison Project for plan view models (MISMIP3d) Zhang, Tong Price, Stephen F. Dr Ju, Lili Leng, Wei Brondex, Julien Durang, Gael Gagliardini, Olivier 2023-06-26 application/pdf http://www.osti.gov/servlets/purl/1342858 https://www.osti.gov/biblio/1342858 https://doi.org/10.5194/tc-11-179-2017 unknown http://www.osti.gov/servlets/purl/1342858 https://www.osti.gov/biblio/1342858 https://doi.org/10.5194/tc-11-179-2017 doi:10.5194/tc-11-179-2017 54 ENVIRONMENTAL SCIENCES 97 MATHEMATICS AND COMPUTING 2023 ftosti https://doi.org/10.5194/tc-11-179-2017 2023-07-11T09:17:08Z Here, we present a comparison of the numerics and simulation results for two "full" Stokes ice sheet models, FELIX-S (Leng et al. 2012) and Elmer/Ice. The models are applied to the Marine Ice Sheet Model Intercomparison Project for plan view models (MISMIP3d). For the diagnostic experiment (P75D) the two models give similar results (< 2 % difference with respect to along-flow velocities) when using identical geometries and computational meshes, which we interpret as an indication of inherent consistencies and similarities between the two models. For the standard (Stnd), P75S, and P75R prognostic experiments, we find that FELIX-S (Elmer/Ice) grounding lines are relatively more retreated (advanced), results that are consistent with minor differences observed in the diagnostic experiment results and that we show to be due to different choices in the implementation of basal boundary conditions in the two models. While we are not able to argue for the relative favorability of either implementation, we do show that these differences decrease with increasing horizontal (i.e., both along- and across-flow) grid resolution and that grounding-line positions for FELIX-S and Elmer/Ice converge to within the estimated truncation error for Elmer/Ice. Stokes model solutions are often treated as an accuracy metric in model intercomparison experiments, but computational cost may not always allow for the use of model resolution within the regime of asymptotic convergence. In this case, we propose that an alternative estimate for the uncertainty in the grounding-line position is the span of grounding-line positions predicted by multiple Stokes models. Other/Unknown Material Ice Sheet SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) The Cryosphere 11 1 179 190 |
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Open Polar |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
op_collection_id |
ftosti |
language |
unknown |
topic |
54 ENVIRONMENTAL SCIENCES 97 MATHEMATICS AND COMPUTING |
spellingShingle |
54 ENVIRONMENTAL SCIENCES 97 MATHEMATICS AND COMPUTING Zhang, Tong Price, Stephen F. Dr Ju, Lili Leng, Wei Brondex, Julien Durang, Gael Gagliardini, Olivier A comparison of two Stokes ice sheet models applied to the Marine Ice Sheet Model Intercomparison Project for plan view models (MISMIP3d) |
topic_facet |
54 ENVIRONMENTAL SCIENCES 97 MATHEMATICS AND COMPUTING |
description |
Here, we present a comparison of the numerics and simulation results for two "full" Stokes ice sheet models, FELIX-S (Leng et al. 2012) and Elmer/Ice. The models are applied to the Marine Ice Sheet Model Intercomparison Project for plan view models (MISMIP3d). For the diagnostic experiment (P75D) the two models give similar results (< 2 % difference with respect to along-flow velocities) when using identical geometries and computational meshes, which we interpret as an indication of inherent consistencies and similarities between the two models. For the standard (Stnd), P75S, and P75R prognostic experiments, we find that FELIX-S (Elmer/Ice) grounding lines are relatively more retreated (advanced), results that are consistent with minor differences observed in the diagnostic experiment results and that we show to be due to different choices in the implementation of basal boundary conditions in the two models. While we are not able to argue for the relative favorability of either implementation, we do show that these differences decrease with increasing horizontal (i.e., both along- and across-flow) grid resolution and that grounding-line positions for FELIX-S and Elmer/Ice converge to within the estimated truncation error for Elmer/Ice. Stokes model solutions are often treated as an accuracy metric in model intercomparison experiments, but computational cost may not always allow for the use of model resolution within the regime of asymptotic convergence. In this case, we propose that an alternative estimate for the uncertainty in the grounding-line position is the span of grounding-line positions predicted by multiple Stokes models. |
author |
Zhang, Tong Price, Stephen F. Dr Ju, Lili Leng, Wei Brondex, Julien Durang, Gael Gagliardini, Olivier |
author_facet |
Zhang, Tong Price, Stephen F. Dr Ju, Lili Leng, Wei Brondex, Julien Durang, Gael Gagliardini, Olivier |
author_sort |
Zhang, Tong |
title |
A comparison of two Stokes ice sheet models applied to the Marine Ice Sheet Model Intercomparison Project for plan view models (MISMIP3d) |
title_short |
A comparison of two Stokes ice sheet models applied to the Marine Ice Sheet Model Intercomparison Project for plan view models (MISMIP3d) |
title_full |
A comparison of two Stokes ice sheet models applied to the Marine Ice Sheet Model Intercomparison Project for plan view models (MISMIP3d) |
title_fullStr |
A comparison of two Stokes ice sheet models applied to the Marine Ice Sheet Model Intercomparison Project for plan view models (MISMIP3d) |
title_full_unstemmed |
A comparison of two Stokes ice sheet models applied to the Marine Ice Sheet Model Intercomparison Project for plan view models (MISMIP3d) |
title_sort |
comparison of two stokes ice sheet models applied to the marine ice sheet model intercomparison project for plan view models (mismip3d) |
publishDate |
2023 |
url |
http://www.osti.gov/servlets/purl/1342858 https://www.osti.gov/biblio/1342858 https://doi.org/10.5194/tc-11-179-2017 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
http://www.osti.gov/servlets/purl/1342858 https://www.osti.gov/biblio/1342858 https://doi.org/10.5194/tc-11-179-2017 doi:10.5194/tc-11-179-2017 |
op_doi |
https://doi.org/10.5194/tc-11-179-2017 |
container_title |
The Cryosphere |
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11 |
container_issue |
1 |
container_start_page |
179 |
op_container_end_page |
190 |
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