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On the shelf resonances of the Gulf of Carpentaria and the Arafura Sea

On the shelf resonances of the Gulf of Carpentaria and the Arafura Sea
On the shelf resonances of the Gulf of Carpentaria and the Arafura Sea
A numerical model is used to investigate the resonances of the Gulf of Carpentaria and the Arafura Sea, and the additional insights that come from extending the analysis into the complex angular velocity plane. When the model is forced at the shelf edge with physically realistic real values of the angular velocity, the response functions at points within the region show maxima and other behaviour which imply that resonances are involved but provide little additional information. The study is then extended to complex angular velocities, and the results then show a clear pattern of gravity wave and Rossby wave like resonances. The properties of the resonances are investigated and used to reinterpret the response at real values of angular velocity. It is found that in some regions the response is dominated by modes trapped between the shelf edge and the coast or between opposing coastlines. In other regions the resonances show cooperative behaviour, possibly indicating the importance of other physical processes.
1812-0792
733-750
Webb, D.J.
6fc412d4-f113-4e55-9e3a-dad18223a445
Webb, D.J.
6fc412d4-f113-4e55-9e3a-dad18223a445

Webb, D.J. (2012) On the shelf resonances of the Gulf of Carpentaria and the Arafura Sea. Ocean Science, 8 (5), 733-750. (doi:10.5194/os-8-733-2012).

Record type: Article

Abstract

A numerical model is used to investigate the resonances of the Gulf of Carpentaria and the Arafura Sea, and the additional insights that come from extending the analysis into the complex angular velocity plane. When the model is forced at the shelf edge with physically realistic real values of the angular velocity, the response functions at points within the region show maxima and other behaviour which imply that resonances are involved but provide little additional information. The study is then extended to complex angular velocities, and the results then show a clear pattern of gravity wave and Rossby wave like resonances. The properties of the resonances are investigated and used to reinterpret the response at real values of angular velocity. It is found that in some regions the response is dominated by modes trapped between the shelf edge and the coast or between opposing coastlines. In other regions the resonances show cooperative behaviour, possibly indicating the importance of other physical processes.

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Published date: 1 September 2012
Organisations: Marine Systems Modelling

Identifiers

Local EPrints ID: 345815
URI: https://eprints.soton.ac.uk/id/eprint/345815
ISSN: 1812-0792
PURE UUID: 10665cdf-86a2-4d57-94e3-5dc0017ea829

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Date deposited: 30 Nov 2012 16:34
Last modified: 19 Jul 2019 21:48

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Author: D.J. Webb

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