NCAR coupled 0 ka and 6 ka simulations Model: CSM1.2, T31 Atmosphere and land x3' Ocean and sea ice (3.6 in longitude, 0.9-1.8 in latitude) Interpolation scheme between models: atm to ocn,ice: bilinear interpolation ocn,ice to atm: area averaging Fields exchanged: state variables plus fluxes atm, lnd, ice communicate 1/hour ocn communicates 1/day Flux correction: none Model spinup: 0 ka run: atmosphere-land run with fixed SST, sea ice for 20 years ocean-sea ice forced with last 5 years of fixed SST run for 20 years with deep ocean accelerated by factor of 50 6 ka run: started from year 275 of 0 ka run Length of simulations: 0 ka run: 400 years, year 0 labeled 1500 6 ka run: 50 years, year 0 labeled 1775 Period chosen for means: Years 1775-1824 for both 0 ka and 6 ka Trace gases, etc.: 0 ka and 6 ka runs: Solar constant: 1365 W/m2 CO2: 280 ppmv CH4: 700 ppbv N2O: 275 ppbv CFC11: 0. CFC12: 0.