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# Arden Buck Equation

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 in 1996[citation needed] is:

$p_w = 6.1121 \exp\left( \frac{(18.678 - T / 234.5) T}{257.14 + T} \right)$

where:

pw is the saturation vapor pressure (hPa)
exp is the exponential function
T is the air temperature in degrees Celsius

## References

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

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Arden_Buck_Equation". A list of authors is available in Wikipedia.
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