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David Archer, Professor

Department of the Geophysical Sciences, University of Chicago

Near Miss: The importance of the natural atmospheric CO2 concentration to human historical evolution

March 3, 2016; Week's Hall Room AB 20; 7:00pm

Abstract

When fossil fuel energy was discovered, the timing and intensity of the resulting climate impacts depended on what the natural CO2 concentration in the atmosphere was at that time. The natural CO2 concentration is thought to be controlled by complex, slow-acting natural feedback mechanisms, and could easily have been different than it turned out to be. If the natural concentration had been a factor of two or more lower, the climate impacts of fossil fuel CO2 release would have occurred about 50 or more years sooner, making it much more challenging for the developing human society to scientifically understand the phenomenon of anthropogenic climate change in time to prevent it.



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