Vector of length n containing daily maximum temperature [C].
Tmin
Vector of length n containing daily minumum temperature [C].
z
Altitude above the sea level [m].
Value
Psychrometric constant [kPaC-1]
References
Allen, R.G., L.S. Pereira, D. Raes, and M. Smith. 1998. Crop Evapotranspiration: Guidelines for computing crop water requirements. Irrigation and Drainage Paper 56, Food and Agriculture Organization of the United Nations, Rome, pp. 300.