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Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
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https://doi.org/10.5194/gmd-2019-244
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-2019-244
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: development and technical paper 16 Sep 2019

Submitted as: development and technical paper | 16 Sep 2019

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This preprint is currently under review for the journal GMD.

A full Stokes subgrid model for simulation of grounding line migration in ice sheets using Elmer/ICE(v8.3)

Gong Cheng, Per Lötstedt, and Lina von Sydow Gong Cheng et al.
  • Department of Information Technology, Uppsala University, P. O. Box 337, SE-75105 Uppsala, Sweden

Abstract. The full Stokes equations are solved by a finite element method for simulation of large ice sheets and glaciers. The simulation is particularly sensitive to the discretization of the grounding line which separates the ice resting on the bedrock and the ice floating on water and is moving in time. The boundary conditions at the ice base are enforced by Nitsche's method and a subgrid treatment of the elements in the discretization close to the grounding line. Simulations with the method in two dimensions for an advancing and a retreating grounding line illustrate the performance of the method. It is implemented in the two dimensional version of the open source code Elmer/ICE.

Gong Cheng et al.

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Gong Cheng et al.

Model code and software

FS sub-grid model is implemented based on Elmer/ICE Version: 8. 3(Rev: f6bfdc9), advance phase Peter R. CSC - IT Center for Science; juhanikataja; ettaka; juharu; mmalinen; Thomas Zwinger; Joe Todd; Sami Ilvonen; mbycklin; Rupert Gladstone; gagliar; fgillet; Gong Cheng; Pavel Ponomarev; Ondřej Meca; Mondher; juhkat; Janne Keränen; Nick Richmond; Juris Vencels; joonaskivi; Laure Tavard https://doi.org/10.5281/zenodo.3401478

FS sub-grid model is implemented based on Elmer/ICE Version: 8. 3(Rev: f6bfdc9), retreat phase Peter R. CSC - IT Center for Science; juhanikataja; ettaka; juharu; mmalinen; Thomas Zwinger; Joe Todd; Sami Ilvonen; mbycklin; Rupert Gladstone; gagliar; fgillet; Gong Cheng; Pavel Ponomarev; Ondřej Meca; Mondher; juhkat; Janne Keränen; Nick Richmond; Juris Vencels; joonaskivi; Laure Tavard https://doi.org/10.5281/zenodo.3401475

Gong Cheng et al.

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Latest update: 20 Feb 2020
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Short summary
A full Stokes subgrid model for the grounding line migration problem is presented in the open source finite element framework Elmer/ICE. This method can achieve comparable results to previous research using much larger mesh size, which can improve the efficiency in marine ice simulations.
A full Stokes subgrid model for the grounding line migration problem is presented in the open...
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