Since the only large sea ice measurements started in 1979 with proper weather satellites, who knows. This may be a normal cyclical thing. Of course the global warming crowd will claim otherwise even in the absence of actual long term data over hundreds of years.
Go to the link and look at the anomaly chart - it is weird. It is so weird it looks like bad data.
could be the build up to a polar shift or switch then again could be someone messing with the data
The very last thing the global warming crowd cares about is “long term data”