FIG. 79. MarchMay 1999 surface temperature anomalies (top, oC) and precipitation
percentiles based on a gamma distribution fit to the 197995 base period (bottom).
Temperature anomalies (196190 base period) are based on station data over land and
sea surface temperature data over water. Precipitation data are obtained from a merge of
rain gauge observations and satellite-derived precipitation estimates (Xie and Arkin
1997). The analysis is omitted in data-sparse regions (white areas).