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The sea ice component of the GEOS-5 AOGCM is the CICE 4.1 developed by the Los Alamos National Laboratory (Hunke and Lipscomb 2008). The model includes several interacting components: a thermodynamic model that computes local growth rates of snow and ice due to vertical conductive, radiative and turbulent fluxes, along with snowfall; a model of ice dynamics, which predicts the velocity field of the ice pack based on ¬a model of the material strength of the ice; a transport model that describes advection of the areal concentration, ice volumes and other state variables; and a ridging parameterization that transfers ice among thickness categories based on energetic balances and rates of strain.
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