GFDL experiment name = CM2.1U-D4_1PctTo4X_J1. PCMDI experiment name =
1%to4x (run1). Initial conditions for this experiment were taken from
1 January of year 1 of the 1860 control model experiment named
CM2.1U_Control-1860_D4. In the CM2.1U-D4_1PctTo4X_J1 experiment
atmospheric CO2 levels were prescribed to increase from their initial
mixing ratio level of 286.05 ppmv at a compounded rate of +1 percent
per year until year 140 (the point of quadrupling). CO2 levels were
held constant at 1144.21 ppmv from year 141 through the end of the 300
year long experiment. For the entire 300 year duration of the
experiment, all non-CO2 forcing agents (CH4, N2O, halons, tropospheric
and stratospheric O3, tropospheric sulfates, black and organic carbon,
dust, sea salt, solar irradiance, and the distribution of land cover
types) were held constant at values representative of year 1860.
realization = 1
source = "GFDL_CM2.1 (2004): atmosphere: AM2.1 (am2p13fv, M45L24);
ocean: OM3.1 (mom4p1p7_om3p5, tripolar360x200L50); sea ice: SIS; land:
LM2; infrastructure: FMS preK release"
