Table 1: Variogram models and parameters for OK interpolation of PRCPTOT and TXx.

IndexTemporal period Variography
ModelSillRangeNuggetAnisotropy parameters
AngleRatio of major and minor axis

PRCPTOT1948–1975Spherical700000400450002.960.83
1976–1992Spherical63000055020500047.280.97
1993–2007Spherical7800005507000083.940.87

TXx1948–1975Spherical1543002.960.71
1976–1992Spherical1053000.960.71
1993–2007Spherical5.84101176.720.73