sat_vap_surf: Saturation vapor pressure at the water surface
In jmerc13/LakeIsodrology: Lake isotope hydrology

sat_vap_surf returns the estimated saturation vapor pressure, e_{ls}, of a water body at its surface in kPa.

1	sat_vap_surf(es, del, Tls, Ta)

`es`	The saturation vapor pressure of the atmosphere, e_{s} (kPa).
`del`	Slope of the saturation vapor pressure curve, Δ (kPa C^{-1}).
`Tls`	Water temperature at the lake surface, T_{ls} (C).
`Ta`	Temperature of the atmosphere, T_{a} (C).

The saturation vapor pressure of a water body is determined given a known air temperature, lake surface temperature, the slope of the saturation vapor pressure curve for a given temperature and saturation vapor pressure for the atmosphere. The relationship used is (Dingman 2008):

e_{ls} = e_{s} + Δ(T_{ls} - T_{a})

Dingman SL. 2008. Physical hydrology. Waveland Press.

jmerc13/LakeIsodrology documentation built on May 5, 2019, 5:52 p.m.