MPI-ESM model (T31 resolution) v. 1.2: step forcing experiment with abrupt doubling of CO2 concentrations

                A step forcing experiment with instantaneous doubling of CO2 concentrations at t=0. The experiment is performed with MPI-ESM model, coarse resolution (CR: T31). It consists of an ensemble with 20 runs over 2000 years, starting from a se top perturbed initial conditions representative of pre-industrial CO2 levels. The experiment is aimed at computing the Green’s function of observable, whose convolution with the time evolution of a forcing allows for prediction of the long-term evolution of the forcing in response to a given forcing. This in the context of the linear response theory (see Lembo et al. 2020).