Chances of a 2019 Blue Ocean Event

After Summer Solstice on this new plot, chances seem to stabilise on about 12% for a late summer ice–free event in the Arctic Ocean. This means the potential is low, but on the other hand the real action starts in July with this indicator for a Blue Ocean Event.

Q: Where’s the data source for this plot?
A: Here: https://sites.google.com/site/arctischepinguin/home/amsr2/data
Q: How do you calculate the chance percentage?
A: It’s a bit complicated, but the % is based on the loss we need in order to have a BOE, and whether or not we melt the required area in the CAB, day by day.
Q: Why focus only on the CAB?
A: CAB, or Central Arctic Basin, held 99.7% of the remaining ice area at minimum in Sep 2012.