" Your comments and thoughts, please."
Far from shore, I suspect that the pressure gradient between the Arctic and Labrador seas is increasingly being met by deep currents of Atlantic waters making their way around N. Greenland through Nares and into Baffin. If Petermann breaks soon that would add confidence to my thoughts, as the breakout of waters from the north side of Humbolt already has. IF my guess has merit then the surface flows, normally southbound become more prone to tidal, even wind, driven changes. So whilst the ice coming from the north will be driven against the coast of Ellesmere to accelerate it to equilibrium with tangential rotational speed once the surface flow is northbound the ice will switch sides and be slowed down by Greenland.