Fig. 3
From: Millennium time-scale experiments on climate-carbon cycle with doubled CO2 concentration
Relationships between cumulative carbon (C) emission and changes in global mean near surface air temperature in two Earth system models. The top panel presents 2000 year simulations by MIROC-ESM; FULL2 × CO2 (black), BGC2 × CO2 (blue), and RAD2 × CO2 (red) experiments where the CO2 concentration is abruptly doubled. The result from the 1pctCO2 experiment is shown in green. The bottom panel presents 1000 year simulations by MIROC-ES2L with the FULL2 × CO2 configuration, together with the result from the 1pctCO2 experiment. Circles presents the final condition of experiments (the last 50 year average). Transient conditions in the Xth year (50 year average centering on the Xth year) are presented by cross marks in white