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Tropical instability waves (TIWs) appear as monthly oscillations of the currents, sea level, and sea surface temperature of the eastern equatorial Pacific. They are understood as unstable waves feeding on the kinetic and potential energy of the mean currents. A general circulation model is shown...
The dynamics of a quasigeostrophic flow confined in a two-layer channel over variable topography on the beta plane is numerically investigated. The topography slopes uniformly upward in the north––south direction (in the beta sense) and is a smooth function of the zonal coordinate. The bottom...
Finescale vertical wavenumber strain spectra (strain: normalized buoyancy frequency variability or vertical derivative of isopycnal displacement) are consistently less steep than shear spectra (shear: vertical derivative of horizontal velocity) for vertical wavelengths smaller than several tens...
The authors show that long-term memory effects, present in the chaotic dispersion process generated by a meandering jet model, can be nonetheless taken into account by a first-order Markov process, provided that the states of the phase-space ““partition,”” conceived in a wider sense, are...
Velocity, surface height profiles, and volume flux are calculated for critically controlled flow of a layer of rotating fluid from a channel to an exit passage. The upstream fluid possesses constant potential vorticity. These are models of an internal layer of ocean water flowing out of a basin...
This study evaluates a data-assimilated model simulation of near-surface circulation in DeSoto Canyon (DSC), Gulf of Mexico, with emphasis on analyzing moored current-meter observations and comparing them with satellite data and model results. The study period is for two years from April 1997 to...
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