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Update on Diabatic Sources of PV Anomalies: Case Study Analysis and Future Plans

This progress update focuses on quantifying the diabatic sources of potential vorticity (PV) anomalies, with recent MetUM case study analyses using PV source/sink tracers. Key observations highlight the interaction of PV tripoles with warming and cooling dipoles across fronts, primarily influenced by microphysical processes and ambient relative vorticity. Future work includes continued case study analyses and idealized experiments to explore the origins, evolution, and consequences of PV tripoles, as well as midlevel PV "strips" or "banners."

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Update on Diabatic Sources of PV Anomalies: Case Study Analysis and Future Plans

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  1. June 2011 WPA.1. Progress Update Quantifying the diabatic sources of PV anomalies Recent work: MetUM case study analysis with PV source/sink tracers (1 paper to be submitted to QJ, 1 in prep) • PV tripoles • Associated with warming/cooling dipoles across fronts • Due mainly to microphysical processes • Generation strongly regulated by the ambient relative vorticity Plans: Continued case study analysis + idealised experiments to examine origin, evolution, and consequences of PV tripoles and midlevel PV “strips” (or “banners”)

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