I'm not interested in the last 1500 years.
It's the next 50 I'm concerned about, and trends of the last 50.
Every body knows Greenland's climate used to be milder, when it changed, the Viking settlers had to evacuate.
And why did you even bother posting that abstract?
"Arctic sea ice extent is now more than two million square kilometres less than it was in the late twentieth century, with important consequences for the climate, the ocean and traditional lifestyles in the Arctic."
...
"...both the duration and magnitude of the current decline in sea ice seem to be unprecedented for the past 1,450 years."
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"...Enhanced advection of warm Atlantic water to the Arctic seems to be the main factor driving the decline of sea ice extent on multidecadal timescales, and may result from nonlinear feedbacks between sea ice and the Atlantic meridional overturning circulation."
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"These results reinforce the assertion that sea ice is an active component of Arctic climate variability and that the recent decrease in summer Arctic sea ice is consistent with anthropogenically forced warming."
That is exactly the same sermon I've been preaching. Anthropogenic warming heats the sea, which melts the ice, and the open water gets insolated, forming a feedback loop that overwhelms the other checks and balances in the system. And his remarks are perfectly consistent with direct contemporary measurements, of CO2 concenttrations in the atmosphere and satellite imagery of ice cover. No inferences from fossil data are required.
TB, you are a man who has found the Secret of the Universe; it answers all your questions and explains all your problems with one simple, clearly identifiable villain, one that just happens to fit in with your political philosophy.
So anyone who doesn't swallow it completely must be a fool, or a villain himself. That's the very definition of anomalism.