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Título

Isolated marginally stable geophysical vortices

AutorViúdez, Álvaro
Palabras claveVortex flow
Vortex instability
Geophysical and geological flows
Fecha de publicaciónago-2017
EditorCambridge University Press
CitaciónJournal of Fluid Mechanics 824: 572-589 (2017)
ResumenLong-term marginal stability of a new family of isolated oceanic vortices is analysed. Sign reversal of the radial gradient of the potential vorticity anomaly, as implied by the isolation requirement, leads to vortex unsteadiness but does not break the coherence of the vortex, which remains marginally stable even for high absolute Rossby numbers . The marginally stable vortices are characterized by a zero amount of potential vorticity anomaly on every isopycnal. The marginally stable final state is an unsteady vortex whose inner one-signed potential vorticity anomaly experiences revolution, rotation, precession and nutation
Descripción12 pages, 6 figures, 2 appendixes, supplementary movies https://doi.org/10.1017/jfm.2017.440
Versión del editorhttps://doi.org/10.1017/jfm.2017.440
URIhttp://hdl.handle.net/10261/157431
DOI10.1017/jfm.2017.440
Identificadoresdoi: 10.1017/jfm.2017.440
issn: 0022-1120
e-issn: 1469-7645
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