Eddies and friction : removal of vorticity from the wind-driven gyre

Fox‐Kemper, Baylor

doi:10.1575/1912/2463

Cited by 6 publications

(8 citation statements)

References 67 publications

(153 reference statements)

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“…A convenient way to interpret this equation is to note that every single term in it represents a divergence of a vorticity flux (Fox-Kemper, 2003). More specifically, the equation can be rewritten as,…”

Section: Dynamics Of the Barotropic Circulationmentioning

confidence: 99%

“…Similarly to what was done in the steady regime, the entire time-averaged barotropic equation (5.18) can be written in a flux divergence form (Fox-Kemper, 2003) and integrated over a region C φ enclosed by a time-mean barotropic streamline. Assuming statistically steady equilibrium and excluding all contributions from fluxes proportional to the mean barotropic velocity, the integrated barotropic vorticity budget…”

Section: Vorticity Budget In the Time-dependent Regimementioning

confidence: 99%

“…Then, vorticity needs to be transported by different means from the interior, where it is added by the wind, to the boundaries, where it can be removed by the lateral friction (Fox-Kemper, 2003).…”

Section: Vorticity Budget In the Time-dependent Regimementioning

confidence: 99%

“…A two-layer QG model can be thought of as an idealized representation of the upper warm ocean separated from the cold abyssal ocean by the thermocline. There is an extensive list of studies based on QG models on a variety of topics ranging from properties of the general ocean circulation and boundary layer dynamics (Rhines and Young, 1982;Cessi et al, 1987;Lozier and Riser, 1989;Fox-Kemper, 2003) to eddy-driven flows and internal modes of variability of the circulation (Holland, 1978;McCalpin and Haidvogel, 1996;Dijkstra and Katsman, 1997;Berloff and McWilliams, 1999a;Simonnet, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…Some examples of such processes are eddy-driven flows (Holland, 1978;Holland and Rhines, 1980), western boundary layer and recirculation dynamics (Cessi et al, 1987;Lozier and Riser, 1989;Berloff and McWilliams, 1999b), free jet dynamics (Jayne and Hogg, 1999), the role of eddies and friction in controlling the mean circulation (Fox-Kemper, 2003), and numerous others. There is also an extensive literature on the internal variability of the wind-driven circulation based on QG models.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Stability of large-scale oceanic flows and the importance of non-local effects

Hristova¹

2009

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Section: Dynamics Of the Barotropic Circulationmentioning

confidence: 99%

Section: Vorticity Budget In the Time-dependent Regimementioning

confidence: 99%

Section: Vorticity Budget In the Time-dependent Regimementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Stability of large-scale oceanic flows and the importance of non-local effects

Hristova¹

2009

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A new mechanism for the generation of quasi‐zonal jets in the ocean

Wang

Spall

Flierl

et al. 2012

Geophysical Research Letters

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A simple barotropic quasi‐geostrophic model is used to demonstrate that instabilities radiated from an unstable eastern boundary current can generate zonal striations in the ocean interior with realistic wavelengths and amplitudes. Nonlinear transfer of energy from the more unstable trapped modes is important for radiating modes to overcome friction. The dynamics shown here are generic enough to point to the eastern boundary current as a likely source of the observed striations extending from oceanic eastern boundaries.

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Nonlinear Radiating Instability of a Barotropic Eastern Boundary Current

Wang

Spall

Flierl

et al. 2013

Journal of Physical Oceanography

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Linear and nonlinear radiating instabilities of an eastern boundary current are studied using a barotropic quasigeostrophic model in an idealized meridional channel. The eastern boundary current is meridionally uniform and produces unstable modes in which long waves are most able to radiate. These long radiating modes are easily suppressed by friction because of their small growth rates. However, the long radiating modes can overcome friction by nonlinear energy input transferred from the more unstable trapped mode and play an important role in the energy budget of the boundary current system. The nonlinearly powered long radiating modes take away part of the perturbation energy from the instability origin to the ocean interior. The radiated instabilities can generate zonal striations in the ocean interior that are comparable to features observed in the ocean. Subharmonic instability is identified to be responsible for the nonlinear resonance between the radiating and trapped modes, but more general nonlinear triad interactions are expected to apply in a highly nonlinear environment.

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Eddies and friction : removal of vorticity from the wind-driven gyre

Cited by 6 publications

References 67 publications

Stability of large-scale oceanic flows and the importance of non-local effects

Stability of large-scale oceanic flows and the importance of non-local effects

A new mechanism for the generation of quasi‐zonal jets in the ocean

Nonlinear Radiating Instability of a Barotropic Eastern Boundary Current

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