An elastic–viscous–plastic sea ice model formulated on Arakawa B and C grids |
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| Authors: | Sylvain Bouillon Miguel ngel Morales Maqueda Vincent Legat Thierry Fichefet |
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| Institution: | aG. Lemaître Institute of Astronomy and Geophysics (ASTR), Université catholique de Louvain, 2 Chemin du Cyclotron, B-1348 Louvain-la-Neuve, Belgium;bProudman Oceanographic Laboratory (POL), 6 Brownlow Street, Liverpool L3 5DA, United Kingdom;cCenter for Systems Engineering and Applied Mechanics (CESAME), Université catholique de Louvain, 4 Avenue G. Lemaître, B-1348 Louvain-la-Neuve, Belgium |
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| Abstract: | The elastic–viscous–plastic (EVP) sea ice rheology has been introduced in the large-scale Louvain-la-Neuve sea-Ice Model, version 2 (LIM2), and its performance has been evaluated. Centred difference versions of the rheology have been implemented on both an Arakawa B grid and a C grid, and their performance have been intercompared in coupled simulations with the Nucleus for European Modelling of the Ocean (NEMO) model. Integrations with both implementations lead to fairly similar results which compare well with observations and with previous LIM simulations. The C grid version, however, offers a number of advantages: (a) easier ice coupling with NEMO, which is itself defined on a C grid; (b) possibility of representing ice transport across one-cell-wide straits and passages; (c) better representation of inertial-plastic compressive waves. For these reasons, we recommend the use of the C grid EVP formulation of the ice dynamics in future LIM applications. |
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| Keywords: | Sea ice Coupled sea ice-ocean model Elastic– viscous– plastic rheology Model grid |
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