Now the northeast passage is open, as well as the northwest, which opened a few days ago:
Cryosphere today graphs
Over the past 6,000 years or so, neither had opened until about 10 years ago. Now both open, sooner and sooner.
Side by side views for 1979 and 2012
And the death spiral for Arctic sea ice continues:
Arctic sea ice volume, yearly spiral from 1979
Some things are really hard to ignore or explain away as natural. An ice free Arctic Ocean would be one of those.
More graphs here: Arctic sea ice graphs