MPI-M Earth System Modelling Framework: millennium control experiment

Jungclaus, Johann

The data represent 6-hourly, daily and monthly average values from the
control experiment for the MPI-M Millennium Project
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
MILLENNIUM_COSMOS (MILLENNIUM_COSMOS project aims at ensemble simualtion of the last millenium (800-2000 AD) using the comprehensive COSMOS Earth System Model)
Spatial Coverage
Longitude 0 to 360 Latitude -90 to 90 Altitude: -5720 m to 10 hPa
Temporal Coverage
800-01-01 to 3900-12-31 (proleptic_gregorian)
Use constraints
Creative Commons Attribution 4.0 International (CC BY 4.0) (
Data Catalog
World Data Center for Climate
13.38 TiB (14713515502502 Byte)
completely archived
Creation Date
Cite as
Jungclaus, Johann (2007). MPI-M Earth System Modelling Framework: millennium control experiment. World Data Center for Climate (WDCC) at DKRZ.

as consistent as the models are
Contact typePersonORCIDOrganization

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.

Is documented by

[1] DOI Haxel, 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

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[Entry acronym: mil0001] [Entry id: 2133223]