The first image shows, roughly, the center of mass of the ice.
I suggest that whenever the ice moves, in any way, cracks open then freeze over resulting in a net movement away from the center +/- of this area. Unless the ice is constrained on the Barents side by the island chains, or the Asian coast, the build up of thick ice is limited. Or, in other words, the day to day expansion of the pack will merely tend to push ice from say 85/180 towards Fram, and thicken ice in the opposite direction. Moving north the ice will have a little excess momentum and tend to accelerate with the Earths rotation, moving south it will conversely lack momentum and lose ground, leading to a base rate of rotation in a clockwise direction that would naturally form part of the energetic input of the Beaufort Gyre. If constrained on the Barents side then the center of mass would 'roll' it's center towards the 120E meridian and here the pressure would force thick ice to form against the coast of Greenland,[+Laptev] and everything south of lat85 would move south and rotate towards Fram.
The second image is from earlier today, it indicates a general high pressure over the Arctic possibly adding to the momentum through Fram and some indication that although the ice may compress a little south of the pole on the 180 meridian the general drift towards the upwelling at the pole should be coming from that direction too. [The low was 1011, i think the mean is 1012, but for thinking I always reckon from 1010 up or down]