There is a press release here from NASA
http://earthobservatory.nasa.gov/Newsroom/view.php?id=42184&src=eorss-manews
which seems to say a 2 to 4C rise is inevitable at the current level
of CO2.
My spin is that without the Arctic sea ice, which did not exist in the
Pliocene, then we will get an abruppt rise of between 2 to 4C. The
rise will be even higher the closer to the North Pole you live.
Even before this newsgroup was set up, I was warning that scientists
were underestimating the effects of global warming. Now, what they are
saying, tends to agree with what I said, but the change in attitude
has come so quickly, it makes me fear that the change in climate may
also be quick. OK we will get an abrupt climate change when the sea
ice goes, but now it seems that the Greenland ice sheet's life
expectancy is decreasing exponentially, and doubt about the survival
of the ice shelves in Antarctica are also growing.
Cheers, Alastair.
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