Definitions for **"Absolute vorticity"**

See vorticity

1. The vorticity of a fluid particle determined with respect to an absolute coordinate system. The absolute vorticity vector is defined by 2â„¦ + âˆ‡ Ã— , where â„¦ is the earth's angular velocity vector and is the three-dimensional relative velocity vector. 2. The vertical component Î· of the absolute vorticity vector (as defined above) given by the sum of the vertical component of the vorticity with respect to the earth (the relative vorticity) Î¶ and the vorticity of the earth (equal to the Coriolis parameter)

The sum of the relative vorticity ( ) and the planetary vorticity, i.e. .