The MPI-ESM1.2-ER configuration is designed to facilitate research on ocean eddies that are explicitly resolved. These experiments continue from the historical experiment until 2100, using the RCP8.5 concentration scenario. There are three realizations for the SSP5-8.5 ocean runs, which continue from the three realizations of the historical runs. However, only two realizations are available for the SSP5-8.5 atmospheric runs. The natural forcing includes variations of the Earth orbit, variability in spectral solar irradiance and seasonally varying natural tropospheric aerosols.

                The MPI-ESM1.2-ER climate model includes the following components: 
                aerosol: none, 
                prescribed MACv2-SP, 
                atmos: ECHAM6.3 (spectral T127/L95; 384 × 192 longitude/latitude; 95 levels; top level 0.01 hPa), 
                land: none, 
                landIce: none/prescribed, 
                ocean: MPIOM1.63 (TP6M, approximately 0.1deg; 3602x2394 longitude/latitude; 40 levels; top grid cell 0-6 m), 
                ocnBgchem: none, 
                seaIce: unnamed (thermodynamic (Semtner zero-layer) dynamic (Hibler 79) sea ice model).

                The model was run by the Max Planck Institute for Meteorology, Hamburg 20146, Germany (MPI-M) in native nominal resolutions: 
                aerosol: 100 km, 
                atmos: 100 km, 
                land: none, 
                landIce: none, 
                ocean: 10 km, 
                ocnBgchem: none, 
                seaIce: 10 km.

                MPI-ESM-ER is a coupled climate model that is conducted following the HighResMIP protocol. Atmospheric component (ECHAM6.3) and ocean component (MPIOM) of the MPI-ESM-ER are coupled with a coupling frequency of 1hr (via OASIS3 coupler). MPI-ESM-ER includes dynamic vegetation, and interactive carbon cycle, as well as advanced representations of atmosphere and ocean processes (Stevens et al., 2013).