carbon dioxide unlikely to spark abrupt climate change

Atmospheric carbon dioxide buildup unlikely to spark abrupt climate change

There have been instances in Earth history when average temperatures have changed rapidly, as much as 10 degrees Celsius (18 degrees Fahrenheit) over a few decades, and some have speculated the same could happen again as the atmosphere becomes overloaded with carbon dioxide.

New research lends support to evidence from numerous recent studies that suggest abrupt climate change appears to be the result of alterations in ocean circulation uniquely associated with ice ages.

http://www.physorg.com/news/2011-06-atm ... brupt.html