- The most significant conclusion, however, is that increased moisture, the presumed cause of feedback, causes a decrease in the warming effect of CO2 (negative feedback).
The limits of carbon dioxide’s influence on world temperature
[Excerpts below, emphasis added, full post here]
Abstract: Consumption of all the world’s fossil fuels at any credible rate will not achieve a doubling of the current CO2 level and will increase world temperature by barely one-half degree Celsius. The achievable level of atmospheric CO2 is proportional to its release rate because its dilution by exchange with the land and ocean takes time. An instantaneous release is the worst case and if the entire world’s CO2 from fossil fuels were so released (impossible, of course) it represents an extreme upper bound to the CO2 level. And even that would achieve an increase of less than 3 degrees Celsius. Most significant, however, is the strong evidence that feedback from increased CO2 is negative.