baroclinic zone

baroclinic zone

A region in which a temperature gradient exists on a constant pressure surface, which occurs in both strengthening and weakening weather systems. Wind shear is characteristic of a baroclinic zone.

In contrast, barotropic systems don’t exhibit significant changes in intensity.
References in periodicals archive ?
1996), whereas for other cyclones, the intense surface fronts develop only during cyclone intensification in an initially broad baroclinic zone (e.
Clearly, some cyclones are already associated with fronts at the time of cyclogenesis, whereas cyclones growing in a broad baroclinic zone acquire their fronts during the life cycle.
However, there is ample observational evidence for cyclogenesis on well-marked fronts (frontal-wave cyclones) as well as for cyclogenesis in the absence of fronts in broader baroclinic zones.
The shift away from the frontal discontinuity as the origin of cyclogenesis was supported by the theory of baroclinic instability (Charney 1947; Eady 1949), which explained the generation of extratropical cyclones in initially broad baroclinic zones without well-marked surface fronts.
Hoffman, 2011: Surface fronts, troughs, and baroclinic zones in the Great Lakes region.