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Ocean Science An interactive open-access journal of the European Geosciences Union
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Volume 8, issue 5
Ocean Sci., 8, 733–750, 2012
https://doi.org/10.5194/os-8-733-2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ocean Sci., 8, 733–750, 2012
https://doi.org/10.5194/os-8-733-2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 01 Sep 2012

Research article | 01 Sep 2012

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

D. J. Webb D. J. Webb
  • National Oceanography Centre, Southampton SO14 3ZH, UK

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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