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..