Abstract: Rossby wave breaking on the dynamical tropopause in the Southern Hemisphere (the ?2-PVU surface) is investigated using the ERA-40 dataset. The indication of wave breaking is based on reversal in the meridional gradient of ...

Abstract: An isentropic coordinate form of quasigeostrophic potential vorticity is derived. Compared with well-known height and pressure coordinate versions, this isentropic form is more clearly related to Ertel's potential vorticity ...