* Note: The ACIA report sourced some of its measurements and projections from the Third Assessment Report (TAR) published in 2001 by the Intergovernmental Panel on CLimate Change (IPCC). In its Fourt Assessment Report (AR4) published in 2007, the IPCC has refined some of the figures. For example,
1 The IPCC AR4 estimate of the Earth's average global temperature increase is 0.76°C.