Arden Buck equation

The Arden Buck equations are a group of empirical correlations that relate the saturation vapor pressure to temperature for moist air. The curve fits have been optimized for more accuracy than the Goff–Gratch equation in the range −80 to 50°C.^[1]

A set of several equations were developed, each of which is applicable in a different situation.

Contents

1 Formula
2 See also
3 Notes
4 References
5 External links

Formula

The equation suggested by Buck (1996) (which is a modification of the equation in Buck (1981)) is:

$p_w = 6.1121 \exp \left(\left( 18.678 - \frac{t} {234.5}\right)\left( \frac{t} {257.14 %2B t} \right)\right)$

where:

p_w is the saturation vapor pressure in hPa
exp is the natural (i.e. base e) exponential function
t is the air temperature in degrees Celsius

See also

Notes

^ Buck 1981

References

Buck, A. L. (1981), "New equations for computing vapor pressure and enhancement factor", J. Appl. Meteorol. 20: 1527–1532, http://ams.allenpress.com/perlserv/?request=get-pdf&doi=10.1175%2F1520-0450%281981%29020%3C1527%3ANEFCVP%3E2.0.CO%3B2
Buck (1996), Buck Research Manual

External links

Web Page listing various vapor pressure equations