Leaf to air water vapour pressure deficit calculation

This function calculates the leaf water pressure deficit (VPDleaf or Ds) using the temperature of the leaf, the temperature of the air and its relative humidity. The saturation vapor pressure of water is approximated usung the Tetens 1930 equation.

f.ds(Tleaf, Tair, RH)

Arguments

Tleaf

Temperature of the leaf in Kelvin.

Tair

Temperature of the air in Kelvin.

RH

Humidity of the air (0 to 100).

Value

Ds in Pascal

References

Tetens O. 1930. Uber einige meteorologische Begriffe. Z. geophys 6: 297-309.

Examples

f.ds(Tleaf=273.16 + 30, Tair=273.16+28, RH=70)
#> [1] 1597.114