Open BaptisteVandecrux opened 4 years ago
Other formulation used by Jason:
; --------------------------------- Saturation Vapor Pressure terms
; Es is the saturation vapor pressure, calculated using the formulation of
; Bolton (1980), accurate to within 0.1% over the +/- 30∞C range
; Bolton, D. 1980. The computation of equivalent potential temperature,
; Mon. Wea. Rev., 108, 1046-1053. Eq. 10.
; ------ Saturation Vapor Pressure
e_t0=6.112
Es=e_T0*(exp((17.67*T)/(T+243.5)))
; ------ Vapor Pressure
e=(Es*(rh/100.))
Different expressions for the saturation vapour pressure over water and ice. This step occurs when the relative humidity given by the instrument with regards to water is adjusted for subfreezing conditions, meaning with regards to ice.
In GC-Net:
In PROMICE (as far as I know):
References for saturation vapour pressure:
Goff, J.A. and Gratch, S., 1946. Low pressure properties of acontribution to the classical theory. Quart. J. Roy. Meteor. water from-160 to, 212, pp.95-121. Lowe, P.R., 1977. An approximating polynomial for the computation of saturation vapor pressure. Journal of Applied Meteorology, 16(1), pp.100-103. Weiss, A., 1977. Algorithms for the calculation of moist air properties on a hand calculator. Transactions of the ASAE, 20(6), pp.1133-1136. More formulations and WMO standards: https://sciencepolicy.colorado.edu/~voemel/vp.html * cs500 documentation
Script for the plot above: