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GHG Concentration Stabilization Level vs Average Temperature Increase GHG Concentration Stabilization Level vs Average Temperature Increase GHG Concentration Stabilization Level vs Average Temperature Increase Equilibrium global average temperature increase above pre-industrial (oC) vs greenhouse gas concentration stabilization level (ppm CO2-eq). Plot represents Charney’s (1979) climate sensitivity relation of 3±1.5oC and red squares regions of Pagani et al.’s (2010) early and mid-Pliocene climate sensitivity relations. Colored zones I to VI represent various CO2 stabilization targets “Charney 1979 Climate Senstivity” is about 3oC for a doubling of CO2. The range shown is for climate sensitivities of 1.5 to 4.5. Source: http://joannenova.com.au/ URL:     http://joannenova.com.au/2010/05/debate-part-5-the-planetary-atmosphere-and-climate-change/