Surface temperature anomalies (Celsius, top)
and surface temperature expressed as percentiles of the normal (Gaussian)
distribution fit to the 1991-2020 base period data (bottom).
Analysis is based on station data over land and on SST data over the
oceans (top). Anomalies for station data are departures from the 1971-2000
base period means, while SST anomalies are departures from the 1991-2020
adjusted OI climatology. (Smith and Reynolds 1998, J. Climate, 11,
3320-3323). Regions with insufficient data for analysis in both
figures are indicated by shading in the top figure only.