TABLE 1.

Correlation matrix of observed and estimated precipitation values

	Precipitation (log)	Linear regression	Polynomial regression	Nearest neighbor
Linear regression	0.640
Polynomial regression	0.663	0.966
Nearest neighbor	0.673	0.901	0.911
Maximum likelihood	0.690	0.897	0.930	0.904

All correlations are significant at p < 0.001.