MAGICC generates a set of interface files for SCENGEN which contain a number of global warming curves for the period 1961-2100. SCENGEN uses these global warming values to scale the GCM patterns of climate change. Exactly which of these curves is used in a given climate change scenario creation depends on the user selections from the CLIM SEN, MAGICC PARAMETERS and SCENARIO sub-menus in SCENGEN.
The current version of MAGICC (Version 2.4) replaces all pre-2000 versions. All the models and default parameter values in the current version are those used by the IPCC in their Second Assessment Report. A new version of MAGICC, currently under development, will be consistent with the IPCC Third Assessment Report (TAR); but this version will not be available until after the TAR is published during 2001.
It is possible to use SCENGEN independently of MAGICC. In this case SCENGEN will have been supplied with a pre-determined set of interface files. These interface files can only be altered by running MAGICC.