Function ps = mollier_ps_tetens(T);
returns the saturation vapour pressure in Pa
for the given air temperature in degrees C.
The approximation in Tetens form is used:
ps = A * exp( B * T / (C + T) ),
where A, B and C are constants given in Wikipedia,
which cites the propositions of:
-- Monteith and Unsworth 2008, and
-- Murray 1967.
See also the m-files:
mollier_ps_magnus.m
mollier_ps_ashrae2013.m
mollier_ps_baehr.m
References:
https://en.wikipedia.org/wiki/Tetens_equation
(visited on 2018-09-07)
Monteith, J.L., and Unsworth, M.H. (2008). "Principles
of environmental physics." Third Ed. Amsterdam: EP.
Murray, F.W. (1967). "On the computation of saturation
vapour pressure". Journal of Applied Meteorology,
vol. 6, pp. 203-204.
(c) 2026 fabien van mook
2026.08.20 release of this file within package "fvm-mollier" under GNU GPLv3+
