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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.

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A coastal ocean model intercomparison study for a three-dimensional idealised test case Tartinville, B.; Deleersnijder, E.; Lazure, P.; Proctor, R.; Ruddick, K.G.; Uittenbogaard, R.E. (1998). A coastal ocean model intercomparison study for a three-dimensional idealised test case. Appl. Math. Modelling 22: 165-182 In: Applied Mathematical Modelling. IPC Science and Technology Press/Elsevier Science: New York. ISSN 0307-904X; e-ISSN 1872-8480, meer

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Beschikbaar in	Auteurs
VLIZ: Open access 262924 [ download pdf ]

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Trefwoorden

Instability > Baroclinic instability Intercomparison Models Transport processes > Advection Vortices ANE, Europa, Noordwest [Marine Regions] Marien/Kust

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Auteurs		Top
Tartinville, B. Deleersnijder, E., meer Lazure, P.	Proctor, R. Ruddick, K.G., meer Uittenbogaard, R.E., meer

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Abstract

Several coastal ocean models have been used to compute the circulation on the Northwest European Continental Shelf. Five of them, developed within the European Union, are compared in the scope of an idealised three-dimensional test case, dealing with the geostrophic adjustment of a freshwater cylinder. As the central eddy adjusts, unstable baroclinic vortices start to grow. All the models are able to produce such unstable vortices. However, two of them produce an order-two instability, which is in accordance with a previous laboratory experiment, while the others exhibit an order- four instability. Using a simple scaling analysis, it is seen that the azimuthal wavenumber depends on the ratio of the kinetic energy to the available potential energy. It appears that the discrepancy in the azimuthal wavenumber is mainly due to the effect of the discretisation of the horizontal advection of momentum which could produce significant decrease of the total kinetic energy.

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