Function metfor::vapor_pressure_water

pub fn vapor_pressure_water<T>(dew_point: T) -> Option<HectoPascal> where
    T: Temperature + PartialOrd<Celsius>,
    Celsius: From<T>, 

Get the vapor pressure over liquid water.

Alduchov, O.A., and Eskridge, R.E. Improved Magnus` form approximation of saturation vapor pressure. United States: N. p., 1997. Web. doi:10.2172/548871.

Returns: The vapor pressure of water vapor.