Priestly-Taylor evapotranspiration model

This model is based on the Priestley-Taylor equation:

RefET_pot =

PT_c · Slope_vpf · (Rad_net - SoilHeatFlux)

(Slope_vpf + γ)

where

PT_c (unitless) is the Priestley-Taylor constant location parameter .
Rad_net ((MJ/m²)/day) is the net radiation .
Slope_vpf (kPa/°C) is the slope of saturation vapor pressure function of temperature
γ (kPa/C) is the psychometric constant
SoilHeatFlux ((MJ/m²)/day) is the soil heat flux.