This experiment was performed in Germany in 1989 using the Max Planck Institute's T21 19-layer atmospheric GCM, coupled to an 11-layer geostropic ocean model. The horizontal resolution of the atmospheric model is 5.6 deg. latitude by 5.6 deg. longitude. ECHAM1-TR is a transient experiment in which the year-by-year greenhouse gas forcing is supplied over 100 years by the IPCC's 1990 BaU Scenario A missions scenario. It is a "cold-start" experiment, in that no historic forcing was introduced to the model prior to the BaU forcing scenario commencing in 1985. The experiment is reported in Cubasch et al. (1992) and Gates et al. (1992) and is widely referred to as "MPI" (this is too vague a description, hence our terminology). We acquired the results from this experiment in 1990 from Ben Santer, at that time at the Max Planck Institute in Hamburg. The change fields used in SCENGEN are calculated as the difference in climate between the 10-year means of years 61-70 in the control (390ppmv CO2 concentration) and perturbed (Scenario A forced) simulations. The global warming by this decade, with respect to the control simulation, was 1.6deg C and the increase in global precipitation was 2.9%, yielding a global precipitation senstivity of 1.8% per deg Celsius warming. The climate sensitivity of the same atmospheric model, coupled to a mixed-layer ocean, was 2.6deg C.
Mean monthly precipitation pattern correlation coefficient = 0.64
Cubasch,U., Hasselmann,K., Hock,H., Maier-Reimer,E., Mikolajewicz,U., Santer,B.D. and Sausen,R. (1992) Time-dependent greenhouse warming computations with a coupled ocean-atmosphere model Climate Dynamics 8, 55-69. Gates,W.L., Mitchell,J.F.B., Boer,G.J., Cubasch,U. and Meleshko,V. (1992) Climate modelling, climate prediction and model validation pp.97-134 in 'Climate Change 1992', Cambridge University Press, Cambridge, UK