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Over 35 years ago, the Ocean Storms Experiment (OSE) in the Northeast Pacific observed the generation of NIWs by a storm. The study found that, consistent with refraction resulting from the beta-effect, NIWs propagated downwards and towards the equator. Interestingly, mesoscale vorticity gradients, which exceed the beta-effect by a factor of ten, did not significantly impact NIW propagation.
In 2019, the NISKINe field program in the North Atlantic also observed the stormy generation and subsequent propagation of NIWs. However, the NISKINe observations revealed that NIW propagation is strongly influenced by mesoscale vorticity gradients and largely ignores the beta-effect. Using NIW-mean flow interaction theory, Professor Young explains that these differences are primarily due to the varying ocean stratification between the OSE and NISKINe sites: during OSE, wind energy was injected mainly into low vertical modes, while at NISKINe, NIW energy was broadly distributed into high vertical modes.
This seminar promises to provide valuable insights into the dynamics of NIWs and their propagation, drawing comparisons between historical and recent observations.
Don’t miss this opportunity to learn from a leading expert in the field.
You can attend this seminar both online via Teams (registrations are open) and in person at the University of Bologna in the Geophysics Library, Viale Berti Pichat 8.