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Vertical Fluxes of Potential Vorticity and the Structure of the Thermocline
Publisher: American Meteorological Society
Abstract: A new framework for understanding the vertical structure of ocean gyres is developed based on vertical fluxes of potential vorticity. The key ingredient is an integral constraint that in a steady state prohibits a net flux ...
Vertical Eddy Energy Fluxes in the North Atlantic Subtropical and Subpolar Gyres
Publisher: American Meteorological Society
Abstract: ddy energy generation and energy fluxes are examined in a realistic eddy-resolving model of the North Atlantic. Over 80% of the wind energy input is found to be released by the generation of eddies through baroclinic ...
A Conceptual Model of Ocean Heat Uptake under Climate Change
Publisher: American Meteorological Society
Abstract: conceptual model of ocean heat uptake is developed as a multilayer generalization of Gnanadesikan. The roles of Southern Ocean Ekman and eddy transports, North Atlantic Deep Water (NADW) formation, and diapycnal mixing in ...
Propagation of Meridional Circulation Anomalies along Western and Eastern Boundaries
Publisher: American Meteorological Society
Abstract: otivated by the adjustment of the meridional overturning circulation to localized forcing, solutions are presented from a reduced-gravity model for the propagation of waves along western and eastern boundaries. For wave ...
The Effects of Stratification on Flow Separation
Publisher: American Meteorological Society
Abstract: Separation of stratified flow over a two-dimensional hill is inhibited or facilitated by acceleration or deceleration of the flow just outside the attached boundary layer. In this note, an expression is derived for this ...
A Conjecture on the Role of Bottom-Enhanced Diapycnal Mixing in the Parameterization of Geostrophic Eddies
Publisher: American Meteorological Society
Abstract: The parameterization of geostrophic eddies represents a large sink of energy in most ocean models, yet the ultimate fate of this eddy energy in the ocean remains unclear. The authors conjecture that a significant fraction ...
Eddy Formation in the Tropical Atlantic Induced by Abrupt Changes in the Meridional Overturning Circulation
Publisher: American Meteorological Society
Abstract: The variability of the meridional overturning circulation (MOC) in the upper tropical Atlantic basin is investigated using a reduced-gravity model in a simplified domain. Four sets of idealized numerical experiments are ...
On the Dynamics of Wind-Driven Circumpolar Currents
Publisher: American Meteorological Society
Abstract: The factors controlling the transport of the Antarctic Circumpolar Current (ACC) have recently been a topic of heated debate. At the latitudes of Drake Passage, potential vorticity contours are uninterrupted by coastlines, ...
An Implicit Formula for Boundary Current Separation
Publisher: American Meteorological Society
Abstract: Boundary layer separation occurs in classical fluids when the boundary layer is decelerated by an adverse pressure gradient. Here a ?separation formula? is derived for downstream variations in the velocity, or pressure, ...
Flow past a Cylinder on a β Plane, with Application to Gulf Stream Separation and the Antarctic Circumpolar Current
Publisher: American Meteorological Society
Abstract: The classical problem of flow past a cylinder is revisited in the context of understanding two oceanographic phenomena: separation of the Gulf Stream from the North American coastline at Cape Hatteras and the interaction ...