Hi David, Climatologists studying the geological record know that we have yet to approach the ceiling of atmospheric tolerance for concentrations of CO2. We know that CO2 levels were much higher in the Cretaceous Period than today and we also know that the flora and fauna of that period was far different from what exists on Earth today. What climatologists do know is the nature of the relationship between CO2 and other GHG levels in the atmosphere and the air’s mean temperature. Weather is not climate but weather data accumulated over time provides us with trends that point to troubling changes to atmospheric and ocean heat exchange dynamics. No climatologist worth a salt would ignore this data. For a Department of Energy to create a report that jigs the story to favour fossil fuel companies in the face of facts on the ground, in the water and in the air, suggests hypocrisy.
]]>Forty years ago Climate scientists were forecasting a sea level rise of 2.5 to 4.5 metres, not the actual rise around say 0.2 of a metre.
The “science” now assumes a climate sensitivity of around 2.5 to 4.5 degrees C and after 40 years of research propose 1.8 to 5.5 degrees C. Why no better definition?
The geological record shows clearly that there is a ceiling to the total amount of warming CO2 can cause but no one has shown the slightest interest in defining precisely how close to this ceiling we are now.
R
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