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Deep Planetary Circulation and Topography: Simple Models of Midocean Flows
Publisher: American Meteorological Society
Abstract: The presence of broad, flowing water masses in the deep ocean requires dynamical explanation. Vertical density diffusion and?-effect are invoked in classical theories; here we show how topographic potential vorticity can ...
The Wind-driven Circulation: Quasi-geostrophic Simulations and Theory for Nonsymmetric Winds
Publisher: American Meteorological Society
Abstract: Simulations of the wind-driven Ocean circulation, carded out with an eddy-resolving quasi-geostrophic numerical model, and symmetric, idealized wind forcing have a large-scale structure that is predicted wen by the steady ...
Greenland’s Pressure Drag and the Atlantic Storm Track
Publisher: American Meteorological Society
Abstract: Some effects of Greenland on the Northern Hemisphere wintertime circulation are discussed. Inviscid pressure drag on Greenland?s slopes, calculated from reanalysis data, is related to circulation patterns. Greenland lies ...
Slippery Bottom Boundary Layers on a Slope
Publisher: American Meteorological Society
Abstract: The turbulent bottom boundary layer for rotating, stratified flow along a slope is explored through theory and numerical simulation. The model flow begins with a uniform current along constant-depth contours and with flat ...
Convective Building of a Pycnocline: A Two-Dimensional Nonhydrostatic Numerical Model
Publisher: American Meteorological Society
Abstract: The convective building of a pycnocline is examined using a two-dimensional nonhydrostatic numerical model forced by a balanced salinity dipole (source and sink). Although the forcing fields are steady, the model develops ...
Convective Building of a Pycnocline: Laboratory Experiments
Publisher: American Meteorological Society
Abstract: The convective building of a pycnocline is examined using a laboratory model forced by surface fluxes of saline water at one end and fresh water at the other. A deep recirculation evolves in the tank, which homogenizes the ...
An Example of Eddy-Induced Ocean Circulation
Publisher: American Meteorological Society
Abstract: Gyre scale and local vorticity balances are examined for a single numerical experiment designed to elucidate the role of eddies in the oceanic general circulation. Due to the complex nature of the flow, a combination of ...
Meridional Transport across a Zonal Channel: Topographic Localization
Publisher: American Meteorological Society
Abstract: Experiments are performed using a two-layer isopycnic numerical model in a zonal channel with a large meridional topographic ridge in the lower layer. The model is forced only by a steady meridional volume transport in the ...
Coherent Eddies in the Labrador Sea Observed from a Mooring
Publisher: American Meteorological Society
Abstract: During June?November 1994, a mooring in the central Labrador Sea near the former Ocean Weather Station Bravo recorded a half-dozen anomalous events that prove to be two different types of coherent eddies. Comparisons with ...
Horizontal Stratification during Deep Convection in the Labrador Sea
Publisher: American Meteorological Society
Abstract: eep convection?the process by which surface waters are mixed down to 1000 m or deeper?forms the primary downwelling of the meridional overturning circulation in the Northern Hemisphere. High-resolution hydrographic ...