Diagnostics of cyclogenesis over the Aegean Sea using potential vorticity inversion

In this study an attempt is made to investigate comprehensively the dynamic s of a case of cyclogenesis over the Aegean Sea within the context of the p otential vorticity. At early stages the cyclogenesis is manifested by a lar ge scale development at the upper levels over Adriatic Sea and Yugoslavia a ssociated with an upper tropospheric potential vorticity anomaly. At later stages a smaller scale development was generated over Aegean Sea associated with a low-level potential vorticity anomaly and a surface warm anomaly. B y means of a two-dimensional potential vorticity inversion it is demonstrat ed that the scale, the position and the strength of the involved anomalies contribute to the surface development, however, the low-level potential vor ticity anomaly seems to constitute the most significant feature, more likel y to be associated with condensation.