Arden Buck Equation

From Wikipedia, the free encyclopedia

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

Web Page listing various vapor pressure equations

The pdf of the article originally published by Buck

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