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Politics : View from the Center and Left -- Ignore unavailable to you. Want to Upgrade?

To: Asymmetric who wrote (234819)	10/16/2013 7:35:39 PM
From: epicure	Respond to of 543134

true

To: Asymmetric who wrote (234819)	10/17/2013 10:22:10 AM
From: No Mo Mo	Respond to of 543134

"Once we've gone past the tipping point, these articles seem to be saying that things will be changing very, very fast." Very, as in non-linear. motherjones.com "It shows something really surprising," says deMenocal. "It's evidence that climate doesn't respond gradually to gradual forcing. It would be wonderful in global warming if everything just kept pace with the gradual rise in CO2, then we could plan for this, we would know what is going to happen, there would be some predictability in it." But what researchers like Tierney and deMenocal are increasingly finding is that climate doesn't change in a linear fashion, but suddenly and seemingly unpredictably. That's because there are positive feedback mechanisms that start to kick in and speed things up. For example, when the Arctic sea ice melts, as it has increasingly in recent years, the area of dark blue heat-absorbing ocean increases, raising temperatures, melting more ice, which in turn raises temperatures still further in an snowballing process."