Figure 2.29: El Niño-La
Niña variations from 1876 to 2000 measured by sea surface temperature in
the region 5°N to 5°S, 150 to 90°W. Reconstructions using pattern
analysis methods from (a) red: UK Met Office (UKMO) Hadley Centre sea ice and
sea surface temperature data set version 1 (Rayner et al., 2000); (b) black: from
the Lamont-Doherty Earth Observatory (LDEO) (Kaplan et al., 1998); (c) blue: the
National Centers for Environmental Prediction (NCEP) analysis (Smith et al., 1998).
1876 is close to the earliest date for which reasonably reliable reconstructions
can be made.