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Quantization of the Low-Frequency Variability of the Double-Gyre Circulation
Publisher: American Meteorological Society
Abstract: The low-frequency dynamics of the double-gyre wind-driven circulation in large midlatitude oceanic basins is investigated. It is shown that for quasigeostrophic models linear (Rayleigh) friction is necessary to obtain ...
Spontaneous Generation of Low-Frequency Modes of Variability in the Wind-Driven Ocean Circulation
Publisher: American Meteorological Society
Abstract: In idealized models that aim to understand the temporal variability of the wind-driven ocean circulation, low-frequency instabilities associated with so-called oscillatory gyre modes have been found. For the double-gyre ...
Low-Frequency Variability in the Midlatitude Baroclinic Atmosphere Induced by an Oceanic Thermal Front
Publisher: American Meteorological Society
Abstract: This study examines the flow induced by an east?west-oriented oceanic thermal front in a highly idealized baroclinic model. Previous work showed that thermal fronts could produce energetic midlatitude jets in an ...
Multistability and Rare Spontaneous Transitions in Barotropic β-Plane Turbulence
Publisher: American Meteorological Society
Low-Frequency Variability in the Midlatitude Atmosphere Induced by an Oceanic Thermal Front
Publisher: American Meteorological Society
Abstract: This study examines the flow induced in a highly idealized atmospheric model by an east?west-oriented oceanic thermal front. The model has a linear marine boundary layer coupled to a quasigeostrophic, equivalent- barotropic ...
Low-Frequency Variability in Shallow-Water Models of the Wind-Driven Ocean Circulation. Part I: Steady-State Solution
Publisher: American Meteorological Society
Abstract: Successive bifurcations?from steady states through periodic to aperiodic solutions?are studied in a shallow-water, reduced-gravity, 2½-layer model of the midlatitude ocean circulation subject to time-independent wind stress. ...
Low-Frequency Variability in Shallow-Water Models of the Wind-Driven Ocean Circulation. Part II: Time-Dependent Solutions
Publisher: American Meteorological Society
Abstract: The time-dependent wind-driven ocean circulation is investigated for both a rectangular and a North Atlantic?shaped basin. Multiple steady states in a 2½-layer shallow-water model and their dependence on various parameters ...
Atmospheric Circulations Induced by a Midlatitude SST Front: A GCM Study
Publisher: American Meteorological Society
Abstract: he atmospheric effects of sea surface temperature (SST) anomalies over and near western boundary currents are a matter of renewed interest. The general circulation model (GCM) of the Laboratoire de Météorologie Dynamique ...