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- W2079508761 endingPage "1695" @default.
- W2079508761 startingPage "1688" @default.
- W2079508761 abstract "We compute the evolution of disturbances on a circularly symmetric eddy having uniform vorticity in a central core, in a surrounding annulus, and in the irrotational exterior water mass. This vortex is known to be (Kelvin-Helmholtz) unstable when its annular width is less than the core radius. Our calculations for the nonlinear regime show that amplification of azimuthal wavenumber n = 2 causes the vortex to split into two dipoles, in agreement with previous numerical calculations for a smoothed version of our vorticity field. This paper concentrates on the evolution of large-amplitude disturbances on the outer edge of a stable and robust eddy. We show that lateral wave breaking of vorticity isopleths causes intrusions of the (irrotational) exterior water mass into the central core of the vortex, a physical process which is relevant to lateral diffusion and isopycnal mixing in baroclinic ocean eddies. Similar intrusive features occur for an n = 1 disturbance, which also causes a “self-propagation” of the entire eddy. The large-amplitude disturbances on the eddy can be initiated by the action of external eddies or currents. A simple model for this case exhibits filaments detraining from the eddy, as well as intrusive features." @default.
- W2079508761 created "2016-06-24" @default.
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- W2079508761 date "1987-10-01" @default.
- W2079508761 modified "2023-09-25" @default.
- W2079508761 title "Horizontal Entrainment and Detrainment in Large-Scale Eddies" @default.
- W2079508761 doi "https://doi.org/10.1175/1520-0485(1987)017<1688:headil>2.0.co;2" @default.
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