The consortia simulations, which are regularly carried out on our supercomputers with respect to the German contribution to the assessment reports of the IPCC, belong to the most affording simulation projects. Starting in 2004, approximately 25 % of our computational resources on HLRE1, our former supercomputer, had been used for more than a year until the complex model calculations were completed. The simulations were realized with the coupled atmosphere ocean model ECHAM5 / MPI-OM developed the Max Planck Institute for Meteorology (MPI-M).
