Figure 13: Observed and
modelled global annual mean temperature anomalies (°C) relative to the average
of the observations over the period 1900 to 1930. The control and three independent
simulations with the same greenhouse gas plus aerosol forcing and slightly different
initial conditions are shown from an AOGCM. The three greenhouse gas plus aerosol
simulations are labeled run 1', run 2', and run 3'
respectively. [Based on Figure 8.15]