Figure SPM-6. (WGI) AOGCM Projections of Surface Temperatures

Projected surface temperature changes for the early and late 21st century relative to the period 1980–1999. The central and right panels show the Atmosphere-Ocean General Circulation multi-Model average projections for the B1 (top), A1B (middle) and A2 (bottom) SRES scenarios averaged over decades 2020–2029 (center) and 2090–2099 (right). The left panel shows corresponding uncertainties as the relative probabilities of estimated global average warming from several different AOGCM and EMICs studies for the same periods. Some studies present results only for a subset of the SRES scenarios, or for various model versions. Therefore the difference in the number of curves, shown in the left- hand panels, is due only to differences in the availability of results. {Figures 10.8 and 10.28}

Source: IPCC Climate Change 2007:  The Physical Science Basis, Summary for Policymakers (2007), p15