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Longshore Currents and the Onset of Upwelling over Bottom Slope
Publisher: American Meteorological Society
Abstract: The evolution of longshore currents produced by upwelling on an f-plane over shelf-like bottom topography for times long compared to a barotropic spin-up time, but short compared to a diffusion time, reveals in a linear, ...
Longshore Currents, Upwelling and Bottom Topography
Publisher: American Meteorological Society
Abstract: The effect of shelf-like bottom topography on a steady, linear, stratified, three-dimensional model of coastal upwelling is examined. It is shown that the presence of the bottom slope 1) reduces the role of the lower Ekman ...
On Coastal Jets and Upwelling in Bounded Basins
Publisher: American Meteorological Society
Abstract: The relationship between coastal upwelling and coastal long-short currents is studied in a simple model of a continuously stratified fluid in a closed basin on the f-plane. It is shown that the coastal long-shore current ...
Steady Baroclinic Flow through Ridges with Narrow Gaps
Publisher: American Meteorological Society
Abstract: The steady baroclinic flow in a basin containing a meridional barrier representing a midocean ridge is studied in the linear, quasigeostrophic limit of a two-layer model. Thermal damping and a simple friction provide ...
The Development of Thermal Anomalies in a Coupled Ocean-Atmosphere Model
Publisher: American Meteorological Society
Abstract: A simplified but nonlinear model of large-scale air?sea interaction is formulated which involves the interaction between a finite-amplitude cyclone wave, the large-scale atmospheric temperature field, and sea?surface ...
Limit Cycles and Unstable Baroclinic Waves
Publisher: American Meteorological Society
Abstract: An analytical theory is presented for long-period pulsations of a finite-amplitude baroclinic wave. It is shown that for small dissipation a limit cycle is possible whether or not the steady wave regime is stable to ...
The Transmission and Transformation of Baroclinic Rossby Waves by Topography
Publisher: American Meteorological Society
Abstract: The transmission of westward propagating baroclinic Rossby waves incident on a gappy meridional barrier is studied in the context of the two-layer, quasigeostrophic model. The meridional barrier models the presence of very ...
Finite-Amplitude Baroclinic Waves in a Continuous Model of the Atmosphere
Publisher: American Meteorological Society
Abstract: The finite-amplitude dynamics of a weakly unstable baroclinic disturbance in an atmosphere with continuous shear and static stability is investigated. The effects of ? (the planetary vorticity gradient), Ekman dissipation ...
On the Relative Importance of Ventilation and Mixing of Potential vorticity in Mid-Ocean Gyres
Publisher: American Meteorological Society
Abstract: An a priori estimate is given of the effect of ventilation on the process of potential vorticity homogenization. Since the homogenization process depends on the presence of weak mixing, it is shown that only a small exposure ...
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