Water vapor pressure deficit

symbols, variables and units

VPD, e_s, e_a: kPa; T: air temperature, select the unit according to the requirements of the saturation formula.

applicable conditions and boundaries

should use the saturation pressure corresponding to consistent temperature; it cannot be directly equated to plant water stress.

formula source code

The following is a copyable LaTeX expression.

VPD=e_s(T)-e_a

Reference and Extended Learning

is organized according to model definition and assumptions. Please check actual conditions and original literature before engineering, research and clinical use.