• Some recent models produce satisfactory simulations of current climate without the need for non-physical adjustments of heat and water fluxes at the ocean-atmosphere interface used in earlier modelSimulations that include estimates of natural and anthropogenic forcing reproduce the observed large-scale changes in surface temperature over the 20th century (Figure 4).

• To obtain the anthropogenic change in global mean temperature from 1880, based on the central estimate of historical forcing used in SAR WGI, 0.2-0.5 ° C should be added.

• Anthropogenic climate change will persist for many centuries.