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RISInteraction of SST Modes in the North Atlantic Ocean
Publisher: American Meteorological Society
Abstract: The spectral origin of the recently discovered multidecadal modes (MMs) and centennial modes (CMs) is explained. These modes appear in the linear stability analysis of thermohaline-driven flows in a single-hemispheric ocean ...
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 ...
Multiple Oscillatory Modes of the Global Ocean Circulation
Publisher: American Meteorological Society
Abstract: For the first time, the (linear) stability of the global ocean circulation has been determined explicitly. In a low-resolution general circulation model, a steady state is computed directly by solving the elliptic boundary ...
Stability of the Global Ocean Circulation: Basic Bifurcation Diagrams
Publisher: American Meteorological Society
Abstract: A study of the stability of the global ocean circulation is performed within a coarse-resolution general circulation model. Using techniques of numerical bifurcation theory, steady states of the global ocean circulation ...
Localization of Multidecadal Variability. Part I: Cross-Equatorial Transport and Interbasin Exchange
Publisher: American Meteorological Society
Abstract: Multidecadal SST variability is studied in idealized one- and two-ocean-basin configurations, using simulations with the Modular Ocean Model. The authors demonstrate that the multidecadal variability on the global ?conveyor ...
Interaction of Additive Noise and Nonlinear Dynamics in the Double-Gyre Wind-Driven Ocean Circulation
Publisher: American Meteorological Society
Abstract: n this paper the authors study the interactions of additive noise and nonlinear dynamics in a quasigeostrophic model of the double-gyre wind-driven ocean circulation. The recently developed framework of dynamically orthogonal ...
Localization of Multidecadal Variability. Part II: Spectral Origin of Multidecadal Modes
Publisher: American Meteorological Society
Abstract: In a companion paper, the authors have shown that in an idealized Atlantic?Pacific Ocean configuration with a conveyor-type overturning circulation, localized multidecadal variability occurs in the Atlantic. Results suggest ...
Optimal Initial Excitations of Decadal Modification of the Atlantic Meridional Overturning Circulation under the Prescribed Heat and Freshwater Flux Boundary Conditions
Publisher: American Meteorological Society
Abstract: ithin a three-dimensional ocean circulation model, the nonlinear optimal initial perturbations (NOIP) of sea surface salinity (SSS) and sea surface temperature (SST) to excite variability in the Atlantic meridional overturning ...
A Nonlinear Theory of the Kuroshio Extension Bimodality
Publisher: American Meteorological Society
Abstract: The Kuroshio Extension (KE) flow in the North Pacific Ocean displays a very distinctive decadal variability of bimodal character involving two completely different states (a large-meander ?elongated? state and a small-meander ...
Sensitivity of North Atlantic Multidecadal Variability to Freshwater Flux Forcing
Publisher: American Meteorological Society
Abstract: In this paper, an explanation is proposed for the changes in the amplitude of multidecadal variability found in the GFDL climate model when different restoring salinity fields in the flux adjustments were considered. This ...