Climate Change 2001:
Working Group I: The Scientific Basis
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Figure 9.1: Global mean temperature change for 1%/yr CO2 increase with subsequent stabilisation at 2xCO2 and 4cCO2. The red curves are from a coupled AOGCM simulation (GFDL_R15_a) while the green curves are from a simple illustrative model with no exchange of energy with the deep ocean. The "transient climate response", TCR, is the temperature change at the time of CO2 doubling and the "equilibrium climate sensitivity", T2x, is the temperature change after the system has reached a new equilibrium for doubled CO2, i.e., after the "additional warming commitment" has been realised.

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