In May 2015 I concluded a series of posts with The Slow Transition. It was a risky prognostication but an additional 7 years of data has supported what I said back then: That the transition to a seasonally sea ice free state would be slow, not fast, as some argued. This post is about the period preceding that, and with the further 7 years of data something substantive can be said about that.
The Arctic Ocean's sea-ice has undergone a fast transition from one stable mode to another equally stable mode. Between those modes there was a bifurcation driven by the power of an increase of Open Water Formation Efficiency and Ice Albedo Feedback. That bifurcation happened between 2002 and 2006, with the 2007 stochastic event delivering the coup-de-grace that finalised the bifurcation event.
