“Overturning the ‘Consensus’ in One Fell Swoop” gloats Planet
Gore, which says the study “concludes that the Earth’s climate
is only about one-third as sensitive to carbon dioxide as the
IPCC assumes” and so we “should expect about a 0.6Â°C additional
increase in temperature between now and 2070″ [0.1Â°C per
decade] if CO2 concentrations hit 550 parts per million, double
preindustrial levels. Is this possible? Aren’t we already
warming up 0.2Â°C per decade — a rate that is expected to rise?
Has future global warming been wildly overestimated by the
Intergovernmental Panel on Climate Change (IPCC) consensus? Or,
as I argue in my book, has future global warming been
underestimated by the IPCC? This is perhaps the central issue in
the climate change debate, so this will be a long post. To cut
to the chase, it is not possible for one study to overturn the
consensus, and in any case this inadequately researched, overly
simplistic, and mistake-riddled study certainly doesn’t. Climate
sensitivity expert James Annan