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Mechanisms of decadal variability of the wind-driven ocean circulation

Hogg, A.M.; Killworth, P.D.; Blundell, J.R.; Dewar, W.K.. 2005 Mechanisms of decadal variability of the wind-driven ocean circulation. Journal of Physical Oceanography, 35 (4). 512-531. https://doi.org/10.1175/JPO2687.1

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Abstract/Summary

Eddy-resolving quasigeostrophic simulations of wind-driven circulation in a large ocean basin are presented. The results show that strong modes of low-frequency variability arise in many parameter regimes and that the strength of these modes depends upon the presence of inertial recirculations in the flow field. The inertial recirculations arise through advection of anomalous potential vorticity by the western boundary current and are barotropized by the effect of baroclinic eddies in the flow. The mechanism of low-frequency oscillations is explored with reference to previous studies, and it is found that the observed mode can be linked to the gyre mode but is strongly modified by the effect of eddies.

Item Type: Publication - Article
Digital Object Identifier (DOI): https://doi.org/10.1175/JPO2687.1
ISSN: 1520-0485
Date made live: 07 Sep 2005 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/117405

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