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Primitive-Equation Instability of Wide Oceanic Rings. Part II: Numerical Studies of Ring Stability
Primitive-Equation Instability Wide Oceanic Rings Ring Stability
2008/7/21
The study of barotropic structure and its effects on oceanic ring stability has yielded seemingly conflicting results. Some studies suggest that the stability of a given ring profile is as sensitive t...
Linear Instability of Barotropic Submesoscale Coherent Vortices Observed in the Ocean
Linear Instability Barotropic Submesoscale Coherent Vortices Observed
2008/7/16
The linear instability of circular quasigeostrophic vortices with horizontal cross sections of angular velocity identical to those that fit the observations of submesoscale eddies in the ocean is inve...
A Three-Dimensional Simulation of the Formation of Anticyclonic Lenses (Meddies) by the Instability of an Intermediate Depth Boundary Current
Three-Dimensional Simulation Anticyclonic Lenses Intermediate Depth Boundary Current
2008/7/16
The evolution of a buoyancy-driven intermediate water current along an idealized continental slope is investigated using a three-dimensional primitive equation ocean model. The outflow current, origin...
On the Linear Approximation of Velocity and Density Profiles in the Problem of Baroclinic Instability
Linear Approximation Density Profiles Baroclinic Instability
2008/7/11
The linear approximation of density and velocity profiles is compared to more realistic models with vertically inhomogeneous density gradients and nonzero anomalous vorticity (i.e., the nonplanetary p...
Instability Dynamics of a Subtropical Jet and Applications to the Azores Front Current System: Eddy-Driven Mean Flow
Instability Dynamics Subtropical Jet Current System Eddy-Driven Mean Flow
2008/7/10
The Azores front is associated with an eastward flowing subtropical jet, which coincides with the northern edge of the North Atlantic subtropical gyre and forms a southern branch of the Gulf Stream. A...
Baroclinic Instability: An Oceanic Wavemaker for Interdecadal Variability
Baroclinic Instability Oceanic Wavemaker Interdecadal Variability
2008/7/10
Numerical simulations of coarse-resolution, idealized ocean basins under constant surface heat flux are analyzed to show that the interdecadal oscillations that emerge naturally in such configurations...
An Improved Bound for the Complex Phase Speed of Baroclinic Instability
Complex Phase Speed Baroclinic Instability
2008/7/4
An improved bound is obtained for the radius of the semicircle in the complex plane containing the complex phase speed of baroclinically unstable plane wave disturbances. In the limit of long waves, t...
Observations of a Tropical Instability Vortex
Observations of a Tropical Instability Vortex
2008/7/3
An upper-ocean vortex associated with tropical instabilities was observed during fall 1990 at 140°W in the shear region between the Pacific South Equatorial Current and the North Equatorial Counter cu...
Proximity of the Present-Day Thermohaline Circulation to an Instability Threshold
Proximity Present-Day Thermohaline Circulation Instability Threshold
2008/6/26
The relation between the mean state of the thermohaline circulation (THC) and its stability is examined using a realistic-geometry primitive equation coupled ocean–atmosphere–ice global general circul...
Instability of Abyssal Currents in a Continuously Stratified Ocean with Bottom Topography
Abyssal Currents Continuously Stratified Ocean Bottom Topography
2008/6/25
A theory is developed for the baroclinic destabilization of density-driven abyssal flows over topography in a rotating environment. The dominant instability mechanism being studied is the release of a...
Influence of the Transport on the Instability of a Boundary Current
Influence Transport Boundary Current
2008/6/20
This paper examines the stability properties of coastal currents having the same potential vorticity (PV) structure but different transports and widths. The PV structure is chosen so as to verify the ...
Equatorial Solitary Waves. Part V: Initial Value Experiments, Coexisting Branches, and Tilted-Pair Instability
Equatorial Solitary Waves Initial Value Experiments Coexisting Branches Tilted-Pair Instability
2008/6/13
series of high-resolution numerical experiments, augmented by theory, to further explore the dynamics of equatorial dipole vortices (Rossby solitary waves) is performed. When the amplitude is suffici...
Long-Term Observations of Tropical Instability Waves
Observationsl Tropical Instability Waves
2008/6/13
Reynolds sea surface temperature (SST) data showing tropical instability waves (TIWs) in the tropical Pacific are analyzed along with current measurements from the Tropical Atmosphere–Ocean (TAO) buoy...
Structure of the Instability Associated with Harmonic Resonance of Short-Crested Waves
Structure Instability Associated Harmonic Resonance Short-Crested Waves
2008/6/6
Harmonic resonance of a short-crested water wave field, one of the three-dimensional water waves, is due to the multiple-like structure of the solutions. In a linear description, the harmonic resonanc...
Instability of Meridional Baroclinic Currents
Instability of Meridional Baroclinic Currents
2008/6/4
The baroclinic instability of a meridional current in a north–south channel is investigated in a two-layer model for the case when the current has no horizontal shear. The vertical shear of the curren...