Abstract

The behaviour of sea ice on geophysical length scales is considered. Hence, the motion and deformation of a large ice pack consisting of a multitude of interacting ice floes and driven by wind drag and ocean current stresses is investigated. The behaviour of the pack is analysed by treating the ice cover as a two-dimensional continuum of horizontal dimensions of the order of tens to hundreds kilometres, with local properties defined by the ice thickness and the ice area concentration. The equations governing the macroscopic behaviour of the ice pack are solved in the material coordinates by applying two discrete methods: a finite-element method and a smoothed particle hydrodynamics method. The results of numerical simulations, carried out for several constitutive models describing the large-scale rheology of sea ice, are presented to illustrate the evolution of the pack under the action of wind, including variation in the ice thickness and ice concentration.

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