The vorticity of a fluid particle determined with respect to an absolute coordinate system. The absolute vorticity vector is defined by 2Ω + ∇ × u, where Ω is the earth's angular velocity vector [..]

is a measure of spin for fluid in the ocean. The absolute vorticity is the sum of the planetary and relative vorticity. Planetary vorticity is due to the spin imparted onto the ocean by the earth's rotation and is equal to f, the Coriolis parameter given by twice the earth's angular speed multiplied by the sine of the latitude. Relative v [..]

See vorticity.

(or Total Vorticity) of air particles at any particular point is comprised of two elements: (i) on the rotating earth, air adopts the local vorticity due to the earth's solid-body rotation about [..]