deltaVP {MeTo}

Slope of the saturation vapor pressure curve

Description

Slope of the saturation vapor pressure curve [kPa/degreeC].

Usage

deltaVP(Tmean = NULL, Tmax = NULL, Tmin = NULL)

Arguments

Tmean

Mean Temperature [degreeC] (mean daily, mean hourly, etc. air temperature)

Tmax

maximum temperature during 24-hour period [degreeC] (if Tmean is missing)

Tmin

minimum temperature during 24-hour period [degreeC] (if Tmean is missing)

Details

valid for daily, hourly and shorter periods

Value

slope of the saturation vapor pressure curve [kPa/degreeC]

Note

eq. 13 of reference

References

Allen, R. G., Pereira, L. S., Raes, D., & Smith, M. (1998). Crop evapotranspiration-Guidelines for computing crop water requirements-FAO Irrigation and drainage paper 56. FAO, Rome, 300(9).

Examples

deltaVP(Tmax = 34.8, Tmin = 25.6)
deltaVP(Tmean = 30.2)