~2018 Beaufort sea ice is still moving very fast
~This of course distorts 2018 extent numbers until much further melting likely requiring less solar energy.
Extent wise 2012 appears to have more open water but 2018 has far more surface water within the main sea ice body. Greater motion adds to extent as well, but also pulverizes the sea ice pans more. The difference here between 12 and 18 will be made more apparent when greater melting continues, it seems obvious that one year had less intra collisions (2012) than the other (2018). This is the difference to consider, a more fluid pack interspersed with water is also more capable in dispersing sea ice in the wider open zones, in effect increasing apparent extent numbers, until what would eventually appear to be a near spontaneous melt down, apparently sudden from all the crushing action transforming uniformly reflecting solar forcing vast sea ice canopy to a partial pulverized slushy mix.
Consider June 22 2013
now consider 2102 August 1 before the great cyclone of August 5
WD June 22, 2018