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Exploring Mechanisms of Variability and Predictability of Atlantic Meridional Overturning Circulation in Two Coupled Climate Models
Publisher: American Meteorological Society
Abstract: ultidecadal variability in the Atlantic meridional overturning circulation (AMOC) of the ocean is diagnosed in the NCAR Community Climate System Model, version 3 (CCSM3), and the GFDL Coupled Model (CM2.1). Common diagnostic ...
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Publisher: American Meteorological Society
Quasigeostrophic Turbulence with Explicit Surface Dynamics: Application to the Atmospheric Energy Spectrum
Publisher: American Meteorological Society
Abstract: The horizontal wavenumber spectra of wind and temperature near the tropopause have a steep ?3 slope at synoptic scales and a shallower ?5/3 slope at mesoscales, with a transition between the two regimes at a wavelength of ...
A Note on the Numerical Representation of Surface Dynamics in Quasigeostrophic Turbulence: Application to the Nonlinear Eady Model
Publisher: American Meteorological Society
Abstract: The quasigeostrophic equations consist of the advection of linearized potential vorticity coupled with advection of temperature at the bounding upper and lower surfaces. Numerical models of quasigeostrophic flow often ...
The Global Characteristics of the Wavenumber Spectrum of Ocean Surface Wind
Publisher: American Meteorological Society
Abstract: he wavenumber spectra of wind kinetic energy over the ocean from Quick Scatterometer (QuikSCAT) observations have revealed complex spatial variability in the wavelength range of 1000?3000 km, with spectral slopes varying ...
Rationalizing the Spatial Distribution of Mesoscale Eddy Diffusivity in Terms of Mixing Length Theory
Publisher: American Meteorological Society
Abstract: bservations and theory suggest that lateral mixing by mesoscale ocean eddies only reaches its maximum potential at steering levels, surfaces at which the propagation speed of eddies approaches that of the mean flow. Away ...
Scales, Growth Rates, and Spectral Fluxes of Baroclinic Instability in the Ocean
Publisher: American Meteorological Society
Abstract: n observational, modeling, and theoretical study of the scales, growth rates, and spectral fluxes of baroclinic instability in the ocean is presented, permitting a discussion of the relation between the local instability ...
On the Relationship between Decadal Buoyancy Anomalies and Variability of the Atlantic Meridional Overturning Circulation
Publisher: American Meteorological Society
Abstract: wing to the role of the Atlantic meridional overturning circulation (AMOC) in ocean heat transport, AMOC variability is thought to play a role in climate variability on a wide range of time scales. This paper focuses on ...
Direct Estimate of Lateral Eddy Diffusivity Upstream of Drake Passage
Publisher: American Meteorological Society
Abstract: he first direct estimate of the rate at which geostrophic turbulence mixes tracers across the Antarctic Circumpolar Current is presented. The estimate is computed from the spreading of a tracer released upstream of Drake ...