African Easterly Waves and Cyclonic Activity over the Eastern Atlantic: Composite and Case Studies

Figure 4

Meridional gradient of Potential Vorticity (left) and Potential Vorticity (right) at 315-K isentropic surface for AEWs associated with cyclones (top) and for non-developing AEWs (AEWs not associated with cyclones (bottom)). Units are PVU for the PV and 0, 01 PVU/100 km for the meridional gradient of PV. 1PVU = 10⁻⁷ m² K s⁻¹ kg⁻¹.