1%/year CO2 increase experiment (to doubling) prepared for the IPCC Fourth Assessment Report. BCM2.0, (2005): atmosphere: ARPEGE V3 T63L31 (cy 22b+); ocean: NERSC-MICOM V1.0 (based on MICOM V2.8), 35 vertical layers, 1.5(E-W) X 0.5(N-S) deg. res. near equator with gradual transformation to square grid cells away from equator; sea ice: NERSC Sea Ice Model (Viscous-plastic + thermodynamic), 4 gridcells per ocean grid cell; land: ISBA ARPEGE V3 version. Experiment was initiated from model year 85 (nominal year 1850) of the control simulation (with bcm_experiment_name: PC3). The time varying forcing agents were varied based upon observations and reconstructions for the late 19th and 20th centuries. Varying forcing agents: CO2,CH4,N2O, CFC11(including other CFCs and HFCs),CFC12 and sulfate aerosols (Boucher data, only direct effect). Non-varying forcing agents: Background aerosols: black carbon, sea salt, desert dust, stratospheric and tropospheric ozone, solar irradiance (1368 W/m2) and the distribution of land cover types. No volcanic aerosols. No heat or fresh water adjustments.
