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Instability of Equivalent-Barotropic Riders
Gulf Stream rings Equivalent-Barotropic Riders azimuthal wavenumber 2.
2009/1/7
It is shown, by the integration of numerical initial-value problems, that modon-with-rider solutions to the equivalent barotropic equation are unstable in the parametric range relevant to Gulf Stream ...
Instability Waves in the Equatorial Atlantic Ocean
North Equatorial Countercurrent zonal pressure gradient total perturbation energy South Equatorial Current
2009/1/6
Evidence is presented for the generation of planetary waves by barotropic instability within the cyclonic shear region of the Atlantic Ocean's South Equatorial Current (SEC). Immediately following the...
Instability of a Mixed Layer Model and the Generation of Near-Inertial Motion. Part II：Mixed Layer Deepening
Mixed Layer Model Near-Inertial Motion Mixed Layer Deepening
2009/1/6
In Part I we examined the stability of a model of the mixed layer, neglecting the deepening rate. Here we examine the effects of the deepening but neglect the oscillations in the steady state. We find...
Instability of a Mixed Layer Model and the Generation of Near-Inertial Motion. Part I：Constant Mixed Layer Depth
Mixed Layer Model Near-Inertial Motion Mixed Layer Depth
2009/1/6
The stability of Niiler's model of a deepening mixed layer was investigated assuming the deepening rate was negligible. Two basically different instability mechanisms appeared. One is a mixture of a K...
The Internal Barotropic Instability of Surface-Intensified Eddies. Part II：Modeling of the Tourbillon Site
Internal Barotropic Instability Surface-Intensified Eddies Tourbillon Site
2009/1/5
Data from the Tourbillon Experiment Intensive Period in the northeast Atlantic presented evidence of a vertical phase shift with time of the main eddy, interpreted as an occurrence of internal barotro...
The Internal Barotropic Instability of Surface-Intensified Eddies. Part I：Generalized Theory of Isolated Eddies
Internal Barotropic Instability Surface-Intensified Eddies Isolated Eddies
2009/1/5
axisymmetric vortices which are purely barotropic, but are immersed in a stratified environment. The energy source is the kinetic energy of the barotropic vortex, which can be converted into baroclini...
Vorticity and Instability during Flow Reversals on the Continental Shelf
Continental Shelf Flow Reversals equatorward wind
2009/1/4
Flow reversals during relaxation of the equatorward wind on the northern California shelf are studied with observations and a simple numerical model. Data from the CODE experiment are used to document...
A Numerical Study of Barotropic Instability Associated with the Soya Warm Current in the Sea of Okhotsk
Soya Warm Current Barotropic Instability Okhotsk
2008/12/27
Numerical model experiments have been carried out in an attempt to elucidate the. generation mechanism of the eddy or wave street in the Soya Warm Current. We use a barotropic model incorporating bott...
A Model of Baroclinic Instability and Waves between the Ventilated Gyre and the Shadow Zone of the North Atlantic Ocean
Baroclinic Instability Ventilated Gyre Shadow Zone North Atlantic Ocean
2008/12/23
Distributions of eddy kinetic energy in the North Atlantic Ocean show that enhanced mesoscale activity exists in the Cape Verde Frontal Zone (the eastern part of the Central Water Boundary). This vari...
The Breakup of Langmuir Circulation and the Instability of an Array of Vortices
Langmuir Circulation side-scan sonar
2008/12/22
The presence and pattern of Langmuir circulation can be detected using side-scan sonar. The circulation creates bands of subsurface bubbles, scatterers of high-frequency sound, in the downwelling regi...
Instability of the Gulf Stream Front in the South Atlantic Bight
Gulf Stream Front South Atlantic Bight frontal zones
2008/12/19
To understand Gulf Stream meanders in the South Atlantic Bight, the growth of three-dimensional perturbations along two-dimensional frontal zones is examined by using linearized primitive equations. T...
Downwelling-Front Instability and Eddy Formation in the Eastern Mediterranean
frontal waves Eddy Formation Downwelling-Front Instability Eastern Mediterranean
2008/12/17
The instability of the downwelling front along the southern coast of Asia Minor is studied with a multimode quasigeostrophic model. Linear analysis shows that the most unstable wave has a length of ab...
Mesoscale Instability and Upwelling. Part 2：Testing the Diagnostics of Vertical Motion with a Three-Dimensional Ocean Front Model
Mesoscale Instability Three-Dimensional Ocean Front Model Vertical Motion
2008/12/16
A three-dimensional primitive equation ocean front model is employed to simulate mesoscale instabilities and then to investigate the validity (and the contingent differences) of three alternative meth...
Mesoscale Instability and Upwelling. Part 1：Observations at the North Atlantic Intergyre Front
Mesoscale Instability North Atlantic Intergyre Front Upwelling
2008/12/16
Mesoscale instabilities have been found with a wavelength of about 85 km growing along the meandering jet of the North Atlantic Intergyre Front at about 52°N, 33°W. They show the signature of baroclin...
Instability of the Thermohaline Circulation with Respect to Mixed Boundary Conditions：Is It Really a Problem for Realistic Models?
Thermohaline Circulation Mixed Boundary Conditions Realistic Models
2008/12/15
A global primitive equations oceanic GCM and a simple four-box model of the meridional circulation are used to examine and analyze the instability of the thermohaline circulation in an ocean model wit...