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RISImpact of Agulhas Leakage on the Atlantic Overturning Circulation in the CCSM4
Publisher: American Meteorological Society
Abstract: he impact of Agulhas leakage variability on the strength of the Atlantic meridional overturning circulation (AMOC) in the Community Climate System Model, version 4 (CCSM4) is investigated. In this model an advective ...
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 ...
Adjustment of the Southern Ocean to Wind Forcing on Synoptic Time Scales
Publisher: American Meteorological Society
Abstract: This study addresses the response of the Southern Ocean to high-frequency wind forcing, focusing on the impact of several barotropic modes on the circumpolar transport. A suite of experiments is performed with an unstratified ...
Modal Decay in the Australia–Antarctic Basin
Publisher: American Meteorological Society
Abstract: The barotropic intraseasonal variability in the Australia?Antarctic Basin (AAB) is studied in terms of the excitation and decay of topographically trapped barotropic modes. The main objective is to reconcile two widely ...
Pacific Decadal Variability: Paced by Rossby Basin Modes?
Publisher: American Meteorological Society
Abstract: systematic study is presented of decadal climate variability in the North Pacific. In particular, the hypothesis is addressed that oceanic Rossby basin modes are responsible for enhanced energy at decadal and bidecadal ...
Stability of the Atlantic Overturning Circulation: Competition between Bering Strait Freshwater Flux and Agulhas Heat and Salt Sources
Publisher: American Meteorological Society
Abstract: The role played by interocean fluxes of buoyancy in stabilizing the present-day overturning circulation of the Atlantic Ocean is examined. A 2D model of the Atlantic overturning circulation is used, in which the interocean ...
Imperfections of the Three-Dimensional Thermohaline Circulation: Hysteresis and Unique-State Regimes
Publisher: American Meteorological Society
Abstract: Different equilibria of oceanic thermohaline circulation may exist under the same forcing conditions. One of the reasons for the existence of these multiple equilibria is a feedback between the overturning circulation and ...
Multiple Oscillatory Modes of the Argentine Basin. Part I: Statistical Analysis
Publisher: American Meteorological Society
Abstract: Observations of the sea surface height in the Argentine Basin indicate that strong variability occurs on a time scale of 20?30 days. The aim of this study is to determine the physical processes responsible for this ...
Multiple Oscillatory Modes of the Argentine Basin. Part II: The Spectral Origin of Basin Modes
Publisher: American Meteorological Society
Abstract: In this paper the spectrum of barotropic basin modes of the Argentine Basin is shown to be connected to the classical Rossby basin modes of a flat-bottom (constant depth), rectangular basin. First, the spectrum of basin ...