# Geostrophic vorticity

From AMS Glossary

## geostrophic vorticity

The vorticity of the geostrophic wind.

If pressure is taken as the vertical coordinate and the variability of the Coriolis parameter is neglected, the geostrophic relative vorticity ζ where

_{g}is given by*g*is the acceleration of gravity,*f*the Coriolis parameter,*z*the height of the constant- pressure surface, and ∇_{p}^{2}is the isobaric Laplacian operator.*See*thermal vorticity.