had he used the currently accepted value of approximately 3°c warming for a doubling of atmospheric co2, hansen would have correctly projected the ensuing global warming.
had he used the currently accepted value of approximately 3°c warming for a doubling of atmospheric co2, hansen would have correctly projected the ensuing global warming.
james hansen:99
an alternate scenario would keep the warming to below this if climate sensitivity were below 3 °c for doubled co 2.