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Conclusion and Perspectives: Sea Ice Drift, Deformation and Fracturing in a Changing Arctic

  • Jérôme Weiss
Chapter
Part of the SpringerBriefs in Earth Sciences book series (BRIEFSEARTH)

Abstract

This concluding chapter briefly reviews the recently evidenced modifications in Arctic sea ice drift, deformation and rheology that occurred during the last decades. For more than 30 years now, increasing average drift velocities and deformation rates, in both summer and winter, not only accompanied but most likely strengthened the Arctic sea ice decline through a modification of the albedo feedback. Indeed, a thinner ice cover means more fracturing, which in turns can have two consequences. First, more lead opening means a decreasing albedo. Second, increasing fracturing facilitates sea ice mobility and export out of the Arctic basin, i.e. means a negative contribution to mass balance. An average mechanical weakening of the Arctic sea ice cover has been highlighted from a strengthening of inertial oscillations. This interweaving of the sea ice state (thickness, concentration) in the one hand, and mechanical/dynamical processes on the other hand, calls for a continuing effort on the analysis of sea ice drift, deformation and fracturing.

Keywords

Albedo Feedback Mechanical Weaken Transpolar Drift Brittle Rheology 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© The Author(s) 2013

Authors and Affiliations

  1. 1.Géophysique de l’EnvironnementLaboratoire de Glaciologie etSaint-Martin d’Hères cedexFrance

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