2015J last report. The arrow points to very near its location. Well further away from wide open water. This temperature means bye bye sea ice, and mass buoy 2015J should turn soon into a boat at any moment. What surprises is how dense the ice was with so warm a water under. The bottom thermistors read -1 C which may be more accurate, however throughout the winter the Buoy appears to have recorded very good water temps.Mass Buoy 2015f, well further North 83.49 North, has -1.4 C water.
There are 2 more locations with 1 degree sst much nearer the Pole, likely retrieved from remote sensing. Those in circles are in doubt, not necessarily incorrect, although the one North of Greenland +28C may be judged incorrect. Note Chukchi sea +10 C North of Novaya Zemlya +6 C, incredibly warm waters.