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1 July 2012 On the Role of Geomorphic Forcing in Tipping the Sea-Ice System
Poornendu P. Singh Chauhan
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Abstract

Singh Chauhan, P.P., 2012. On the role of geomorphic forcing in tipping the sea-ice system.

The variability in polar sea-ice extents is generally viewed through oceanographic and atmospheric perspectives and despite an obvious contribution of coastline intricacies in the form of land–water configuration and shallow submarine topography a geomorphic standpoint is lacking. This article explores the signs of criticality in the sea-ice variability of Arctic and Antarctic regions and investigates it in terms of the morphology of these two areas. The realization that the sea-ice system tends to attain a self-organized critical state in the two distinct regimes corresponding to ice retainment and replenishment further allows conceptualization of a framework for a “tipping” point. The intrinsic role of coastline configuration as the basis of geomorphic forcing in the threshold dynamics of sea-ice variability is hence advocated to indicate relevance in long-term climate change scenarios, whereas recognition of nonequilibrium criticality in the sea-ice system allows the temporal disparity in its fluctuations to be perceived as natural features.

Poornendu P. Singh Chauhan "On the Role of Geomorphic Forcing in Tipping the Sea-Ice System," Journal of Coastal Research 28(4), 774-779, (1 July 2012). https://doi.org/10.2112/JCOASTRES-D-10-00127.1
Received: 18 August 2010; Accepted: 1 November 2010; Published: 1 July 2012
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KEYWORDS
Antarctic
Arctic
coastline intricacies
criticality
intrinsic abrupt changes
regime shift
sea-ice variability
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