Relationships Between Geostrophic Winds, Ice Strain Rates and the Piecewise Rigid Motions of Pack Ice
We examine sea ice deformation in the Beaufort Sea as computed by the Geophysical Processor System from sequential SAR images, together with coincident estimates of the geostrophic wind and its gradients from the International Arctic Buoy Program. Grid cells of deforming ice at the 5 km scale tend to align in linear features of 100 km or more, separating regions of rigid body motion. We relate the principal axis of shear in the ice to the angle between the linear deformation feature and the ice velocity difference across the feature. We also find a strong relation between the principal axes of shear in the ice and in the wind.
KeywordsSynthetic Aperture Radar Synthetic Aperture Radar Image Geostrophic Wind Synthetic Aperture Radar Data Velocity Jump
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