Arden Buck Equation
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The Arden Buck Equation is an equation describing the saturation vapor pressure of water at various temperatures. It is based on more recent experiments than the Goff-Gratch equation.
A set of several equations were developed, each of which is applicable in a different situation.
The one suggested for common use was:
pw = 6.1121 e(18.678 - t / 234.5) t / (257.14 + t) [1996] pw = 6.1121 e[17.502 t / (240.97 + t)] [1981] with t in [°C] and pw in [hPa]
Buck, A. L., New equations for computing vapor pressure and enhancement factor, J. Appl. Meteorol., 20, 1527-1532, 1981