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Overturning Circulation in an Eddy-Resolving Model: The Effect of the Pole-to-Pole Temperature Gradient
Publisher: American Meteorological Society
Abstract: The effect of the pole-to-pole surface temperature difference on the deep stratification and the strength of the global meridional overturning circulation (MOC) is examined in an eddy-resolving ocean model configured in ...
Eddy-Driven Buoyancy Gradients on Eastern Boundaries and Their Role in the Thermocline
Publisher: American Meteorological Society
Abstract: It is demonstrated that eddy fluxes of buoyancy at the eastern and western boundaries maintain alongshore buoyancy gradients along the coast. Eddy fluxes arise near the eastern and western boundaries because on both coasts ...
Salt Feedback in the Adiabatic Overturning Circulation
Publisher: American Meteorological Society
Abstract: he adiabatic overturning circulation is the part of the meridional overturning circulation that persists in the limit of vanishing diffusivity. Two conditions are required for the existence of the adiabatic overturning ...
Adiabatic Eastern Boundary Currents
Publisher: American Meteorological Society
Abstract: he dynamics of the eastern boundary current of a high-resolution, idealized model of oceanic circulation are analyzed and interpreted in terms of residual mean theory. In this framework, it is clear that the eastern boundary ...
Multiple Regimes and Low-Frequency Variability in the Quasi-Adiabatic Overturning Circulation
Publisher: American Meteorological Society
Abstract: hen interior mixing is weak, the ocean can support an interhemispheric overturning circulation on isopycnals that outcrop in both the Northern Hemisphere and a high-latitude southern circumpolar channel. This overturning ...
Laboratory Experiments on Eddy Generation by a Buoyant Coastal Current Flowing over Variable Bathymetry
Publisher: American Meteorological Society
Abstract: Irminger rings are warm-core eddies formed off the west coast of Greenland. Recent studies suggest that these eddies, which are implicated in the rapid springtime restratification of the Labrador Sea, are formed by an ...
What Sets the Strength of the Middepth Stratification and Overturning Circulation in Eddying Ocean Models?
Publisher: American Meteorological Society
Abstract: The processes maintaining stratification in the oceanic middepth (between approximately 1000 and 3000 m) are explored using an eddy-resolving general circulation model composed of a two-hemisphere, semienclosed basin with ...
The Adiabatic Pole-to-Pole Overturning Circulation
Publisher: American Meteorological Society
Abstract: he adiabatic pole-to-pole cell of the residual overturning circulation (ROC) is studied in a two-hemisphere, semienclosed basin, with a zonally reentrant channel occupying the southernmost eighth of the domain. Three ...
Normal-Mode Analysis of a Baroclinic Wave-Mean Oscillation
Publisher: American Meteorological Society
Abstract: The stability of a time-periodic baroclinic wave-mean oscillation in a high-dimensional two-layer quasigeostrophic spectral model is examined by computing a full set of time-dependent normal modes (Floquet vectors) for the ...
Singular Vectors and Time-Dependent Normal Modes of a Baroclinic Wave-Mean Oscillation
Publisher: American Meteorological Society
Abstract: Linear disturbance growth is studied in a quasigeostrophic baroclinic channel model with several thousand degrees of freedom. Disturbances to an unstable, nonlinear wave-mean oscillation are analyzed, allowing the comparison ...