Dynamical, rather than kinematical, considerations indicate that a generalized potential vorticity in terms of the gradient of an arbitrary scalar function requires that the potential vorticity flux vector contain a contribution due to gravity and the pressure gradient force. It is shown that such a potential vorticity flux vector has a simpler definition in terms of the gradient of the kinetic energy rather than that of a Bernoulli function. This result is valid for multicomponent fluids. Flux vectors for a salty ocean and a moist atmosphere with hydrometeors are presented.
|Original language||English (US)|
|Number of pages||5|
|Journal||Journal of the Atmospheric Sciences|
|State||Published - Dec 1 2003|
All Science Journal Classification (ASJC) codes
- Atmospheric Science