2009-07-02

andygates: (polarbear)
2009-07-02 08:26 am
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Place bets now!

This year's seasonal Arctic melt is getting well underway.  The exact level is mostly guesswork unless you've been paying attention to the last year or so's weather up there - and even if you have, there's plenty of natural variability to season the pudding. 

To help choose your "extent o' doom" [tm] here's a pointer: so much ice melted last year that a lot of this year's ice is thin single-year stuff, more vulnerable to warm weather and storm breakup. 

To recover multi-year ice, we'll need the last couple of years to have been a blip and for a couple of years of better-than-the-scary-plunging-red-eyetrend.  If the coverage ends up below 4,000,000 sq km, the blip is strongly reinforced as a nose-dive trend.