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Representation of Topography by Shaved Cells in a Height Coordinate Ocean Model
Publisher: American Meteorological Society
Abstract: Height coordinate ocean models commonly represent topography as a ?staircase? of discontinuous steps that are fitted to the model grid. Here the ramifications of an alternative approach are studied in which ?shaved cells? ...
An Adjoint Analysis of the Meridional Overturning Circulation in a Hybrid Coupled Model
Publisher: American Meteorological Society
Abstract: Multicentury sensitivities in a realistic geometry global ocean general circulation model are analyzed using an adjoint technique. This paper takes advantage of the adjoint model?s ability to generate maps of the sensitivity ...
An Adjoint Analysis of the Meridional Overturning Circulation in an Ocean Model
Publisher: American Meteorological Society
Abstract: Using the adjoint of a fully three-dimensional primitive equation ocean model in an idealized geometry, spatial variations in the sensitivity to surface boundary forcing of the meridional overturning circulation?s strength ...
Robustness of an Effective Diffusivity Diagnostic in Oceanic Flows
Publisher: American Meteorological Society
Abstract: The robustness of Nakamura?s effective diffusivity diagnostic for quantifying eddy diffusivities of tracers within a streamwise-average framework is carefully examined in an oceanographic context, and the limits of its ...
Understanding the Regional Variability of Eddy Diffusivity in the Pacific Sector of the Southern Ocean
Publisher: American Meteorological Society
Abstract: A diagnostic framework is presented, based on the Nakamura effective diffusivity, to investigate the regional variation in eddy diffusivity. Comparison of three different diffusivity calculations enables the effects of ...
Implementation of an Atmosphere–Ocean General Circulation Model on the Expanded Spherical Cube
Publisher: American Meteorological Society
Abstract: A hydrodynamical kernel that drives both an atmospheric and oceanic general circulation model is implemented in general orthogonal curvilinear coordinates using the finite-volume method on the sphere. The finite-volume ...
Simulated Response of the Arctic Freshwater Budget to Extreme NAO Wind Forcing
Publisher: American Meteorological Society
Abstract: The authors investigate the response of the Arctic Ocean freshwater budget to changes in the North Atlantic Oscillation (NAO) using a regional-ocean configuration of the Massachusetts Institute of Technology GCM (MITgcm) ...
Estimates and Implications of Surface Eddy Diffusivity in the Southern Ocean Derived from Tracer Transport
Publisher: American Meteorological Society
Abstract: Near-surface ?effective diffusivities? associated with geostrophic eddies in the Southern Ocean are estimated by numerically monitoring the lengthening of idealized tracer contours as they are strained by surface geostrophic ...
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 ...
Correlation Analysis of Multiple Sensors for Industrial Gas Turbine Compressor Blade Health Monitoring
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper summarizes an analysis of data obtained from an instrumented compressor of an operational, heavy duty industrial gas turbine; the goal of the aforementioned analysis is to understand some of the fundamental ...