The Australian based Centre of Excellence for Climate System Science has released a new study arguing that climate models have underestimated the extent to which the doubling of carbon dioxide will affect global surface temperatures. While earlier climate sensitivity models projected a 1.5 to 5 degree Celsius increase in global temperature by 2100, the new research removes the low end estimate and projects an increase of between 3 and 4 degrees Celsius. In Fahrenheit, a four degree increase in the current average global temperature of a round 14 Celsius to 18 Celsius translates into a roughly 7 degree increase on the Fahrenheit scale from 57 degrees to 64 degrees for an average global temperature.

At a time when much of the Midwest, North east and American South are experiencing near record cold temperatures the new study is likely to be met with some scepticism and derision from climate change deniers who argue with anecdotes rather than with the body of scientific data and climate models based upon that data.

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