Vorticity advection

vorticity advection

Advection of vorticity by the total wind:

where v is the total wind vector, ∇_p is the del operator on an isobaric surface, ζ is the relative vorticity, and f is the planetary vorticity (the Coriolis parameter).

Vorticity advection is one parameter used in the prediction of vertical motion in the atmosphere: Positive vorticity advection corresponds to rising motion, and negative vorticity advection corresponds to sinking motion (
see omega equation). Synoptically, the 500-mb level is used to evaluate vorticity advection since it is close to the level of nondivergence in the atmosphere where vorticity is approximately conserved.

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The process of transport of an atmospheric property solely by the mass motion (velocity field) of the atmosphere; also, the rate of change of the value of the advected property at a given point.

1. A gaseous envelope gravitationally bound to a celestial body (e.g., a planet, its satellite, or a star).