Journal cover Journal topic
The Cryosphere An interactive open-access journal of the European Geosciences Union
doi:10.5194/tc-2016-276
© Author(s) 2016. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
23 Dec 2016
Review status
This discussion paper is under review for the journal The Cryosphere (TC).
Ice bridges and ridges in the Maxwell-EB sea ice rheology
Véronique Dansereau1, Jérôme Weiss1, Pierre Saramito2, Philippe Lattes3, and Edmond Coche4 1Institut des Sciences de la Terre, CNRS UMR 5275, Université de Grenoble, Grenoble, France
2Laboratoire Jean Kuntzmann, CNRS UMR 5224, Université de Grenoble, Grenoble, France
3TOTAL S.A. – DGEP/DEV/TEC/GEO, Paris, France
4TOTAL S.A. – DGEP/AF/CG-TEPCG/DBD/DDP/DMHB, Pointe Noire-Poincare, Congo
Abstract. 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.

Citation: Dansereau, V., Weiss, J., Saramito, P., Lattes, P., and Coche, E.: Ice bridges and ridges in the Maxwell-EB sea ice rheology, The Cryosphere Discuss., doi:10.5194/tc-2016-276, in review, 2016.
Véronique Dansereau et al.
Véronique Dansereau et al.
Véronique Dansereau et al.

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