The upper 3 frames on February 13 contains open water in the upper part. Also some dark bands of new formed ice is seen in this part of the image. At the lower right hand side, the grey background is probably containing open water and/or pancake ice. This part appears almost as bright as the open water. At the junction to the open water, new ice is formed.
Tim Flintholm Fink<tff@emi.dtu.dk>