The data represent 6-hourly, daily and monthly average values from the control experiment for the MPI-M Millennium Project (http://www.mpimet.mpg.de/en/wissenschaft/working-groups/millennium.html) using the comprehensive MPI-M Earth System Model ECHAM5/JSBACH/MPI-OM/HAMOCC including an interactive carbon cycle. The coupled model was restarted in year 800 after a more than 4000-year spinup phase and was run for 2000 years using the following fixed forcings. Atmospheric CH4 (=650ppb) and N2O (=270ppb) concentrations for year 800 were derived from ice core measurements at Law Dome, Antarctica (MacFarling Meure, C., D. Etheridge, C. Trudinger, P. Steele, R. Langenfelds, T. van Ommen, A. Smith, and J. Elkins (2006), Law Dome CO2, CH4 and N2O ice core records extended to 2000 years BP, Geophys. Res. Lett., 33, L14810, doi:10.1029/2006GL026152). CFC concentrations were set to zero while pre-industrial climatological values were used for O3 and sulfate. The model was run under perpetual orbital conditions of year 800. CO2 is interactively transported in the atmosphere and the ocean. The atmospheric concentration was initially set to 278ppm, again derived from the Law Dome ice core for year 800, at the beginning of the spinup run but, at the end of the spinup, had reached a value of about 281ppm which was used at the start of mil0001. The ocean state at the start of the coupled spinup run was taken from separate, standalone MPI-OM and HAMOCC spinup experiments using Levitus and OMIP forcings. Technical details: The experiment used the following models/resolutions: ECHAM5 (EH5) Version 5.4.01 at T31L19 resolution JSBACH (JSB) at T31 resolution, one soil layer, 13 vegetation types and four vegetation tiles per grid box MPI-OM/HAMOCC Version 1.3.0 at GR3.0L40 resolution The output from the experiment is archived at hpss:/dxul/ut/9/prj/im0387/m212098/cosmos-1.1.0_millennium/experiments/mil0001
[1] DOIHaxel, J. H.; R. P. Dziak. (2005). A model intercomparison of changes in the Atlantic thermohaline circulation in response to increasing atmospheric CO2 concentration. doi:10.1029/2005GL023205
Is described by
[1] Roeckner, E.; Baeuml, G.; Bonaventura, L.; Brokopf, R.; Esch, M.; Giorgetta, M.; Hagemann, S.; Kirchner, I.; Kornblueh, L.; Manzini, E.; Rhodin, A.; Schlese, U.; Schulzweida, U.; Tompkins, A. (2003). The atmospheric general circulation model ECHAM 5. PART I: Model description. http://hdl.handle.net/11858/00-001M-0000-0012-0144-5