A numerical study of the string function using a primitive equation ocean model.

Tyler, Robert H. and Käse, Rolf H. (2000) A numerical study of the string function using a primitive equation ocean model. Geophysical and Astrophysical Fluid Dynamics, 92 . pp. 65-83. DOI 10.1080/03091920008203711.

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We use results from a primitive-equation ocean numerical model (SCRUM) to test a theoretical 'string function' formulation put forward by Tyler and Käse in another article in this issue. The string function acts as a stream function for the large-scale potential energy flow under the combined beta and topographic effects. The model results verify that large-scale anomalies propagate along the string function contours with a speed correctly given by the cross-string gradient. For anomalies having a scale similar to the Rossby radius, material rates of change in the layer mass following the string velocity are balanced by material rates of change in relative vorticity following the flow velocity. It is shown that large-amplitude anomalies can be generated when wind stress is resonant with the string function configuration.

Document Type: Article
Keywords: Potential vorticity, geostrophic contours, string function, eddy propagation, rossby wave, numerical model
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-TM Theory and Modeling
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1080/03091920008203711
ISSN: 0016-7991
Date Deposited: 18 Feb 2008 17:24
Last Modified: 28 Sep 2017 09:01
URI: http://oceanrep.geomar.de/id/eprint/1845

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