Ice bridges and ridges in the Maxwell-EB sea ice rheology

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This paper presents a first implementation of the Maxwell-EB model on geophysical scales. The model is tested on the basis of its capability to reproduce the complex mechanical and dynamical behaviour of sea ice drifting through a narrow passage. Idealized as well as realistic simulations of the flow of ice through Nares Strait are presented. These demonstrate that the model reproduces the formation of stable ice bridges as well as the stoppage of the flow, a phenomenon occurring within numerous channels of the Arctic. In agreement with observations, the propagation of damage along narrow arch-like kinematic features, the discontinuities in the velocity field across these features dividing the ice cover in floes, the strong spatial localization of the thickest, ridged ice and the opening of polynyas downstream of the Strait are all represented. The model represents different dynamical behaviours linked to an overall weakening of the ice cover and to the shorter lifespan of ice bridges, with implications in terms of increased ice export through narrow outflow pathways of the Arctic.




Dansereau, V., Weiss, J., Saramito, P., Lattes, P., & Coche, E. (2017). Ice bridges and ridges in the Maxwell-EB sea ice rheology. Cryosphere, 11(5), 2033–2058.

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