Climate Change 2001:
Working Group I: The Scientific Basis
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Figure 2.6: Smoothed annual anomalies of global average sea surface temperature (°C) 1861 to 2000, relative to 1961 to 1990 (blue curve), night marine air temperature (green curve), and land-surface air temperature (red curve). The data are from UK Met Office and CRU analyses (adapted from Jones et al., 2001, and Parker et al., 1995). The smoothed curves were created using a 21-point binomial filter giving near-decadal averages. Also shown (inset) are the smoothed differences between the land-surface air and sea surface temperature anomalies..

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