We are getting now in the time of year where extent of the years in my limited data set are very close together (within 400k or less). 2016 falls nicely in that range.
Update 20160720.
Extent: -99.2 (-271k vs 2015, -362k vs 2014, -182k vs 2013, +20k vs 2012)
Area: -82.1 (-450k vs 2015, -752k vs 2014, -572k vs 2013, -238k vs 2012)
You will find the updated graphs in the
top postRegional declines are nowhere very remarkable, Chukchi, CAA, ESS and Hudson all dropped around -18k.
Regional area declines are biggest in Greenland Sea (-42k) and CAA (-36k).
Regional CAB area is making a very early drop as has been noticed elsewhere. You could pose the question how significant that is. Borders of the CAB are sometimes logical following geographic features (CAA, Barents, Greenland Sea), some places there is some arbitrary choice in it (borders with Beaufort, Chukchi, ESS and Laptev).
An alternative would be to look not just at the CAB but at the Arctic Basin, including CAB, Beaufort, Chukchi, ESS and Laptev. That graph is attached below. It is instructive to compare the three data sets used. The UH AMSR2 has 2016 as the lowest, NSIDC has 2016 somewhere in the middle and Jaxa AMSR2 puts it as the highest.
What is the truth? Normally I would regard Jaxa AMSR2 as the most accurate of the three methods. The rankings change from day to day, perhaps the cyclonic disturbances still have to settle. We see how it develops.
Oh, about AB extent the methods agree: extent is among the highest for the date.