Therefore, the physical mechanism responsible for the propagation of these equatorial Rossby waves is none other than the conservation of potential vorticity:
12.
In the upper troposphere the tropopause slants downward the further north in latitude and there is more high potential vorticity stratospheric air northward.
13.
In the first case the instability can occur if there is an axisymmetric bump ( as a function of radius ) in the inverse potential vorticity
14.
Instead of using the vertical temperature gradient as the defining variable, the dynamic tropopause surface is expressed in " potential vorticity units " ( PVU ).
15.
The first key part of the setup for cyclogenesis is the arrival of an upper-level positive potential vorticity perturbation on top of a lower-level baroclinic region.
16.
"' Potential vorticity analysis of " " " cyclogenesis "'is a way of understanding extratropical cyclogenesis, usually described from a synoptic or vertical velocity perspective
17.
Forecast files are organized by level type ( single level, pressure level, potential vorticity level, and potential temperature level ), and forecast time-step for a specified model.
18.
The conservation of potential vorticity also causes bends along the Gulf Stream, which occasionally break off due to a shift in the Gulf Stream's position, forming separate warm and cold eddies.
19.
Their frequencies are much lower than that of gravity waves and represent motion that occurs as a result of the undisturbed potential vorticity varying ( not constant ) with latitude on the curved surface of the earth.
20.
"Dowling An expert in the dynamics of the atmospheres of the giant planets, he determined a relationship between potential vorticity and the zonal wind on Jupiter and developed explicit planetary isentropic-coordinate models for Jupiter, Saturn, Uranus and Neptune.
