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The elastic–viscous–plastic method revisited

The elastic–viscous–plastic method revisited
The elastic–viscous–plastic method revisited
In this paper, we show that one of the most widely used methods to solve the non-linear viscous–plastic (VP) sea ice rheology, the elastic–viscous–plastic (EVP) method, generates artificial linear bands of high deformation that may be confounded with real linear kinematic features observed in the Arctic ice pack. These numerical artefacts are easily filtered out by using a slightly different regularization of the internal stress. In addition, the EVP method is reinterpreted as an iterative solver and a clear distinction appears between the numerical and physical parameters. Two numerical parameters determine the stability and accuracy of the method and are adjusted to avoid the noisy ice deformation fields frequently observed with the EVP method in nearly rigid ice areas. This study also confirms the unsatisfactory numerical convergence of the EVP method and investigates the effects of the numerical parameters on sea ice deformation, internal stress and velocity fields obtained with unconverged solutions.
Viscous–plastic rheology, Elastic–viscous–plastic, Sea ice, NEMO
1463-5003
2-12
Bouillon, Sylvain
02664ff3-1e95-4227-a462-9e2ff510d118
Fichefet, Thierry
7b3028c8-1af9-4671-b041-51022a13bf73
Legat, Vincent
79408cac-64f3-4434-98bf-973f9e9552a2
Madec, Gurvan
ffb28deb-4bbd-4a4c-914f-492f813e4864
Bouillon, Sylvain
02664ff3-1e95-4227-a462-9e2ff510d118
Fichefet, Thierry
7b3028c8-1af9-4671-b041-51022a13bf73
Legat, Vincent
79408cac-64f3-4434-98bf-973f9e9552a2
Madec, Gurvan
ffb28deb-4bbd-4a4c-914f-492f813e4864

Bouillon, Sylvain, Fichefet, Thierry, Legat, Vincent and Madec, Gurvan (2013) The elastic–viscous–plastic method revisited. Ocean Modelling, 71, 2-12. (doi:10.1016/j.ocemod.2013.05.013).

Record type: Article

Abstract

In this paper, we show that one of the most widely used methods to solve the non-linear viscous–plastic (VP) sea ice rheology, the elastic–viscous–plastic (EVP) method, generates artificial linear bands of high deformation that may be confounded with real linear kinematic features observed in the Arctic ice pack. These numerical artefacts are easily filtered out by using a slightly different regularization of the internal stress. In addition, the EVP method is reinterpreted as an iterative solver and a clear distinction appears between the numerical and physical parameters. Two numerical parameters determine the stability and accuracy of the method and are adjusted to avoid the noisy ice deformation fields frequently observed with the EVP method in nearly rigid ice areas. This study also confirms the unsatisfactory numerical convergence of the EVP method and investigates the effects of the numerical parameters on sea ice deformation, internal stress and velocity fields obtained with unconverged solutions.

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More information

Published date: November 2013
Keywords: Viscous–plastic rheology, Elastic–viscous–plastic, Sea ice, NEMO
Organisations: Marine Systems Modelling

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Local EPrints ID: 359113
URI: https://eprints.soton.ac.uk/id/eprint/359113
ISSN: 1463-5003
PURE UUID: d9ebe30b-a441-4a81-9968-83218ecfa538

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Date deposited: 22 Oct 2013 09:44
Last modified: 18 Jul 2017 03:23

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Contributors

Author: Sylvain Bouillon
Author: Thierry Fichefet
Author: Vincent Legat
Author: Gurvan Madec

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