The sulphate aerosol (direct effect) and greenhouse gas experiment (GSD): The forcing includes not only the greenhouse gas forcing described with the "greenhouse run" (GHG) but also the direct radiative effect of historic sulphateaerosol concentrations from 1860 to 1990 and a scenario of sulphate aerosol concentrations from 1990 to 2049. The sulphate aerosol concentrations are calculated in the ECHAM4 model from the sulphur emissions in the IS92a scenario. The corresponding control run is ECHAM4_OPYC_T42_71413_CTRL. Location of model raw data: schauer.dkrz.de:/pf/m/m214002/EXP600/run697/Y### Note: /pf/m/m214002/EXP600/run697/Y266/22697sulf_26612.01 is lost (damaged tape)