Influence of assimilated eddies on the large-scale circulation in a model of the northwest Atlantic Ocean

Greatbatch, Richard J. and Zhai, Xiaoming (2006) Influence of assimilated eddies on the large-scale circulation in a model of the northwest Atlantic Ocean. Geophysical Research Letters, 33 (2). ISSN 0094-8276

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Abstract

In this letter, we apply a novel technique (the “semidiagnostic method”) to assimilate the eddy field from a model with constrained large-scale circulation into a model version with an unconstrained large-scale circulation. Assimilation of the eddies (i) drives an anomalous circulation corresponding to the northern recirculation gyre of the Gulf Stream, but of insufficient strength to appear in the mean field and (ii) leads to a much enhanced circulation in the northwest corner, east of Newfoundland. We argue that the blocking of f/H contours from the east by the mid-Atlantic Ridge is a major influence on the dynamics of the northwest corner, and that the dynamics of the eddy-driven northern recirculation and the northwest corner are fundamentally similar.

Item Type: Article
Faculty \ School: Faculty of Science > School of Environmental Sciences
University of East Anglia > Faculty of Science > Research Groups > Marine and Atmospheric Sciences
University of East Anglia > Faculty of Science > Research Groups > Meteorology, Oceanography and Climate Dynamics
University of East Anglia > Faculty of Science > Research Groups > Climate, Ocean and Atmospheric Sciences
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Depositing User: Pure Connector
Date Deposited: 23 Oct 2013 12:44
Last Modified: 25 Jul 2018 08:42
URI: https://ueaeprints.uea.ac.uk/id/eprint/43790
DOI: 10.1029/2005GL025139

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