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Arctic Death Spiral: Sea Ice Passes De Facto Tipping Point Thanks to Deniers, Media Blow The Story, Again http://apocadocs.com/s.pl?1312925537
The Arctic is all but certain to be virtually ice free within two decades (barring extreme volcanic activity). I'm happy to make bets with any bloggers, like Andy Revkin, who apparently believe otherwise.
The recent scientific literature makes clear that while that death spiral could theoretically be reversed, it would require policies that climate science deniers have successfully demonized, policies many in the traditional media regularly pooh pooh or undercut.
So we have passed a de facto tipping point, "the critical point in an evolving situation that leads to a new and irreversible development." If that wasn't obvious from observations, then it should have been clear from a December study in Nature widely misunderstood by the media. That study showed sea ice extent crashing by two thirds by the 2030s and then collapsing to near-zero shortly thereafter -- unless we cut GHG emissions about 60 percent to 70 percent almost immediately and have further cuts after that, an implausible assumption the authors never spelled out clearly....
The best recent models show staggeringly high Arctic warming this century if we stay on our current emissions path (see "M.I.T. doubles its 2095 warming projection to 10 deg F -- with 866 ppm and Arctic warming of 20 deg F"). Cooling ain't in the cards. Quite the reverse.
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[Read more stories about:
arctic meltdown, global warming, death spiral, tipping point]
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