Fig. 4
From: Model improvement and future projection of permafrost processes in a global land surface model
Permafrost area of the historical model simulation (blue) and observation (outlined in black) for the simulations with the atmospheric forcings of all five GCMs (GFDL-ES2M, Dunne et al. 2012; HadGEM2-ES, Jones et al. 2011; IPSL-CM5A-LR, Dufresne et al. 2013; Nor-ESM, Bentsen et al. 2013; MIROC-ESM-CHEM, Watanabe et al. 2011). The upper panel shows the results with the improved scheme; the lower panel shows the results with the conventional scheme