Both series have been smoothed with a 5-point running mean, and the SST anomalies have been divided by 4 so that they can be plotted on the same ordinate as the land temperature. Compressed PostScript files are available for both color and in black and white versions of this plot. Gridded analyses of land surface temperature anomalies, from which the time series was derived, were prepared by Phil Jones and collaborators. Documentation and digital values for the gridded land data may be obtained here . Additional analyses and digital values of the cold tongue SST anomaly time series are available elsewhere on this page.
Digital values are available here .
Compressed PostScript files are available for both color and in black and white versions of this plot. Compressed PostScript files are available for both color and in black and white versions of this plot. As is well known, island precipitation in the equatorial Pacific is strongly influenced by the ENSO phenomenon, as captured by variations in Eq. Pacific cold tongue SST anomalies. The precipitation index has been standardized with respect to the period 1950-89.