Observations indicate that global temperature rise has slowed in the last decade. The least squares trend for January 1999 to December 2008 calculated from the HadCRUT3 dataset (Brohan et al. 2006) is +0.07±0.07°C decade–1—much less than the 0.18°C decade–1 recorded between 1979 and 2005.

El Niño–Southern Oscillation is a strong driver of interannual global mean temperature variations. ENSO and non-ENSO ontributions can be separated by the method of Thompson et al. The trend in the ENSO-related component for 1999–2008 is +0.08±0.07°C decade–1, fully accounting for the overall observed trend. The trend after removing ENSO (the "ENSO-adjusted" trend) is 0.00°±0.05°C decade–1, implying much greater disagreement with anticipated global temperature rise.

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