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Life and Demise of Intrathermocline Mesoscale Vortices
Publisher: American Meteorological Society
Abstract: AbstractThis study is focused on finescale dissipation mechanisms of intrathermocline mesoscale vortices exemplified by meddies, large anticyclonic salt lenses of Mediterranean origin commonly observed in the lower North ...
On the Topographic Modulation of Large-Scale Eddying Flows
Publisher: American Meteorological Society
Abstract: AbstractThe modulation of large-scale eddying flows by gentle variation in topography is examined using a combination of direct numerical simulations and theoretical arguments. The basic state is represented by a laterally ...
Residual-Mean Solutions for the Antarctic Circumpolar Current and Its Associated Overturning Circulation
Publisher: American Meteorological Society
Abstract: Residual-mean theory is applied to the streamwise-averaged Antarctic Circumpolar Current to arrive at a concise description of the processes that set up its stratification and meridional overturning circulation on an f ...
Equilibration of a Warm Pumped Lens on a β plane
Publisher: American Meteorological Society
Abstract: The dynamics of a warm lens created by a surface buoyancy flux and Ekman pumping in an initially homogeneous, unbounded fluid on a ? plane is studied in a set of high-resolution numerical experiments. A simple analytical ...
Eddy-Induced Diapycnal Fluxes and Their Role in the Maintenance of the Thermocline
Publisher: American Meteorological Society
Abstract: High-resolution numerical experiments are diagnosed to study the integral effects of geostrophic eddy fluxes on the large-scale ocean circulation. Three characteristic large-scale flows are considered: 1) an anticyclonic ...
The Leaky Thermocline
Publisher: American Meteorological Society
Abstract: A model for the vertical structure of ocean gyres is presented that extends the ideal thermocline theories of Rhines and Young and Luyten et al. to include a cross-layer volume flux associated with geostrophic eddy transfer. ...
The Antarctic Circumpolar Current in Three Dimensions
Publisher: American Meteorological Society
Abstract: A simple theory is developed for the large-scale three-dimensional structure of the Antarctic Circumpolar Current and the upper cell of its overturning circulation. The model is based on a perturbation expansion about the ...
Self-Propagating Eddies on the Stratified f Plane
Publisher: American Meteorological Society
Abstract: Analytical solutions of the shallow-water system of equations in a 1½-layer f-plane model are obtained for stable quasi-monopolar vortices propagating due to a dipolar (azimuthal mode m = 1) component whose amplitude is ...
Finescale Instabilities of the Double-Diffusive Shear Flow
Publisher: American Meteorological Society
Abstract: This study examines dynamics of finescale instabilities in thermohaline?shear flows. It is shown that the presence of the background diapycnal temperature and salinity fluxes due to double diffusion has a destabilizing ...
The Self-Propagating Quasi-Monopolar Vortex
Publisher: American Meteorological Society
Abstract: If an azimuthally symmetric barotropic eddy on the f plane is subject to a relatively small amplitude disturbance of unit azimuthal wavenumber (m = 1), it can propagate very many diameters away from its origin, as shown ...