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The Louvain-La-Neuve sea ice model LIM3.6: global and regional capabilities

The Louvain-La-Neuve sea ice model LIM3.6: global and regional capabilities
The Louvain-La-Neuve sea ice model LIM3.6: global and regional capabilities
The new 3.6 version of the Louvain-la-Neuve sea ice model (LIM) is presented, as integrated in the most recent stable release of Nucleus for European Modelling of the Ocean (NEMO) (3.6). The release will be used for the next Climate Model Inter-comparison Project (CMIP6). Developments focussed around three axes: improvements of robustness, versatility and sophistication of the code, which involved numerous changes. Robustness was improved by enforcing exact conservation through the inspection of the different processes driving the air–ice–ocean exchanges of heat, mass and salt. Versatility was enhanced by implementing lateral boundary conditions for sea ice and more flexible ice thickness categories. The latter includes a more practical computation of category boundaries, parameterizations to use LIM3.6 with a single ice category and a flux redistributor for coupling with atmospheric models that cannot handle multiple sub-grid fluxes. Sophistication was upgraded by including the effect of ice and snow weight on the sea surface. We illustrate some of the new capabilities of the code in two standard simulations. One is an ORCA2-LIM3 global simulation at a nominal 2° resolution, forced by reference atmospheric climatologies. The other one is a regional simulation at 2 km resolution around the Svalbard Archipelago in the Arctic Ocean, with open boundaries and tides. We show that the LIM3.6 forms a solid and flexible base for future scientific studies and model developments.
1991-9603
2991-3005
Rousset, C.
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Vancoppenolle, M.
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Madec, G.
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Fichefet, T.
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Flavoni, S.
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Barthélemy, A.
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Benshila, R.
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Chanut, J.
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Levy, C.
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Masson, S.
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Vivier, F.
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Rousset, C.
2c494e95-3940-4655-aa8b-d62fddcb2033
Vancoppenolle, M.
b42a1fbe-2c19-47aa-b569-3fd6d561bb91
Madec, G.
7e2ec04b-896a-4861-b2d0-b74f39d748c2
Fichefet, T.
4ed3268c-fc74-441e-be25-b67acc51d066
Flavoni, S.
0512fbfb-458f-49a6-b16d-e3d964d9eee0
Barthélemy, A.
35351407-c0a8-4cb2-b9ea-b622cf72e0ca
Benshila, R.
c0ed2989-8d9c-4aad-9bc0-7a02b217657e
Chanut, J.
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Levy, C.
3d04358d-cb83-464e-b323-51101c9390e6
Masson, S.
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Vivier, F.
95f1ea9a-80ed-43cb-a253-c1c6c957c57a

Rousset, C., Vancoppenolle, M., Madec, G., Fichefet, T., Flavoni, S., Barthélemy, A., Benshila, R., Chanut, J., Levy, C., Masson, S. and Vivier, F. (2015) The Louvain-La-Neuve sea ice model LIM3.6: global and regional capabilities. Geoscientific Model Development, 8 (10), 2991-3005. (doi:10.5194/gmd-8-2991-2015).

Record type: Article

Abstract

The new 3.6 version of the Louvain-la-Neuve sea ice model (LIM) is presented, as integrated in the most recent stable release of Nucleus for European Modelling of the Ocean (NEMO) (3.6). The release will be used for the next Climate Model Inter-comparison Project (CMIP6). Developments focussed around three axes: improvements of robustness, versatility and sophistication of the code, which involved numerous changes. Robustness was improved by enforcing exact conservation through the inspection of the different processes driving the air–ice–ocean exchanges of heat, mass and salt. Versatility was enhanced by implementing lateral boundary conditions for sea ice and more flexible ice thickness categories. The latter includes a more practical computation of category boundaries, parameterizations to use LIM3.6 with a single ice category and a flux redistributor for coupling with atmospheric models that cannot handle multiple sub-grid fluxes. Sophistication was upgraded by including the effect of ice and snow weight on the sea surface. We illustrate some of the new capabilities of the code in two standard simulations. One is an ORCA2-LIM3 global simulation at a nominal 2° resolution, forced by reference atmospheric climatologies. The other one is a regional simulation at 2 km resolution around the Svalbard Archipelago in the Arctic Ocean, with open boundaries and tides. We show that the LIM3.6 forms a solid and flexible base for future scientific studies and model developments.

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Published date: 1 October 2015
Organisations: Marine Systems Modelling

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Local EPrints ID: 388140
URI: http://eprints.soton.ac.uk/id/eprint/388140
ISSN: 1991-9603
PURE UUID: 358bc83c-afd8-426b-a48f-0219f87c94f7

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Date deposited: 18 Feb 2016 16:54
Last modified: 14 Mar 2024 22:53

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Contributors

Author: C. Rousset
Author: M. Vancoppenolle
Author: G. Madec
Author: T. Fichefet
Author: S. Flavoni
Author: A. Barthélemy
Author: R. Benshila
Author: J. Chanut
Author: C. Levy
Author: S. Masson
Author: F. Vivier

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