Baroclinic waves and frontogenesis. Part II: uniform potential vorticity jet flows - cold and warm fronts.

Abstract

The semi-geostrophic equations are used to study the baroclinic instability of jet flows having zero potential vorticity gradient. Normal modes of the linear problems are obtained and it is shown that the most unstable modes tend to tilt in the horizontal with the ambient shears of the basic zonal flows.- from Authors