RHtoVPD(RH, TdegC, Pa = 101)VPDtoRH(VPD, TdegC, Pa = 101)esat(TdegC, Pa = 101)DewtoVPD(Tdew, TdegC, Pa = 101)VPDleafToAir(VPD, Tleaf, Tair, Pa = 101)VPDairToLeaf(VPD, Tair, Tleaf, Pa = 101)RHleafToAir(RH, Tleaf, Tair, Pa = 101)RHairToLeaf(RH, Tair, Tleaf, Pa = 101)
Converts relative humidity (%) to vapour pressure deficit (kPa), or vice versa.
To convert from relative humidity, use the RHtoVPD
function,
use VPDtoRH
for the other way around. The water vapor saturation pressure is
calculated with esat
(using Jones 1992). Also provided is DewtoVPD
to
convert from dewpoint temperature to VPD. The functions VPDleafToAir
and VPDairToLeaf
convert VPD from a leaf temperature to an air-temperature basis and vice versa.
Jones, H.G. 1992. Plants and microclimate: a quantitative approach to environmental plant physiology. 2nd Edition., 2nd Edn. Cambridge University Press, Cambridge. 428 p.