This chapter deals with the methods, data, and physics that relate to sea ice kinematics. It begins with a mathematical description of the two-dimensional motion of a rigid body and a continuum. Then observations of two elements of sea ice kinematics—drift and deformation—are given and analysed using the mathematical techniques presented. The kinematics approach is unique in allowing stochastic modelling, which is treated in the third section. In the last section, the ice conservation law is derived for the ice state, linking the ice state from Chapter 2 to its mechanical changes due to kinematics.
KeywordsArctic Ocean Thickness Distribution Central Arctic Ocean Pure Divergence Pure Convergence
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