This graph from Wipneus shows the abruptness of the change:
And the physics of ice is also a dead giveaway. Here, the Arctic temperature shows a dramatic upswing.
This is why: when water freezes it releases its specific latent heat.
The specific latent heat is the amount of energy required to convert 1 kg (or 1 lb) of a substance from solid to liquid (or vice-versa) without a change in the temperature of the surroundings — all absorbed energy goes into the phase change — is known as the specific latent heat of fusion.
For water, that’s about 334 KiloJoules of energy per kilogram.
Added: Note that in the record low year 2012, the date of the turning point was September 16th, this year was just a little bit earlier, but didn’t come close to a record, nor did it come close to predictions made for an ice free Arctic or less than 1 million square kilometers.
The value this year looks to be about 4.139 million square kilometers according to NSIDC data on September 11th of 2016.
Not that any of this matters, it’s not about climate at all, climate is just the vehicle to get the globalist agenda going.