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Politics : Mainstream Politics and Economics -- Ignore unavailable to you. Want to Upgrade?

To: Little Joe who wrote (6891)1/14/2012 2:31:27 PM
From: koan  Read Replies (4) | Respond to of 85487
 
Little Joe, the scientists have controlled for all of that.

Ask yourself this. When was the last time the arctic was ice free. It is about to be ice free again. In just a few years. Pack ice is already about half its old thickness in just the last few decades.

What that is doing is interesting. As more and more arctic ice melts, more and more heat is absorbed by the water which is melting the pack ice from below. White reflects the suns heat. Then in the winter as the heat is released it forms a high pressure area which pushes the jet stream around in new ways. Often pushing cold weather to the northeast.



To: Little Joe who wrote (6891)1/14/2012 2:41:04 PM
From: Alastair McIntosh  Respond to of 85487
 
during the MWP Greenland was not an icesheet

Er, no. During the MWP there was a relatively small amount of melting around the edges where cattle breeding and dairy farming could be carried on in some of the sheltered fiords.

The main ice sheet was still there. If not, the worlds coastal cities would have been flooded with seas 20ft higher than today.


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