Identification of Gouging reflectors in sea ice radar imagery

The above movie shows preliminary results from this technique applied to 48 hours of radar data in March 2010. A target that might be associated with gouging can be identified according to the variance of its velocity and reductions in speed. Free-drifting targets maintain near-constant velocity. The blue markers show the trajectories of the free drifting reflectors. The red markers show the trajectories of floes that slowed and came to a halt. This is typical behavior for deep-keeled ridges that experience more ocean drag than the surrounding ice, though in some cases it may also indicate interaction with the seafloor. This is typical behavior for deep-keeled ridges that experience more ocean drag than the surrounding ice, though in some cases it may also indicate interaction with the seafloor. We believe this represents the creation of a grounded ridge through advection.