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Laboratoire d'études en Géophysique et océanographie spatiales |  |
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Laboratoire d'études en Géophysique et océanographie spatiales | |
| HAL: hal-00690731, version 1 |
| DOI: 10.1016/j.ocemod.2012.03.003 |
| Detailed view |  Export this paper |
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| Ocean Modelling 49-50 (2012) 1-21 |
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| Two-way nesting in split-explicit ocean models: Algorithms, implementation and validation |
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| Laurent Debreu 1Patrick Marchesiello 2 |
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| (2012-06) |
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| A full two-way nesting approach for split-explicit, free surface ocean models is presented. It is novel in three main respects: the treatment of grid refinement at the fast mode (barotropic) level; the use of scale selective update schemes; the conservation of both volume and tracer contents via refluxing. An idealized application to vortex propagation on a β plane shows agreement between nested and high resolution solutions. A realistic application to the California Current System then confirm these results in a complex configuration. The selected algorithm is now part of ROMS_AGRIF. It is fully consistent with ROMS parallel capabilities on both shared and distributed memory architectures. The nesting implementation authorizes several nesting levels and several grids at any particular level. This operational capability, combined with the inner qualities of our two-way nesting algorithm and generally high-order accuracy of ROMS numerics, allow for realistic simulation of coastal and ocean dynamics at multiple, interacting scales. |
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| 1: | MOISE (INRIA Grenoble Rhône-Alpes / LJK Laboratoire Jean Kuntzmann) |
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CNRS : UMR5224 – INRIA – Laboratoire Jean Kuntzmann – Université Joseph Fourier - Grenoble I – Institut Polytechnique de Grenoble - Grenoble Institute of Technology |
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| 2: | Laboratoire d'Etudes en Géophysique et Océanographie Spatiales (LEGOS) |
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Institut de recherche pour le développement [IRD] – CNRS : UMR065 |
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| 3: | Department of Oceanography |
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University of Cape Town |
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| 4: | Laboratoire de physique des océans (LPO) |
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CNRS : UMR6523 – Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) – INSU – Université de Bretagne Occidentale [UBO] – Institut de recherche pour le développement [IRD] – Institut Universitaire Européen de la Mer (IUEM) |
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| 5: | Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) |
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CNRS : UMR5566 – Institut de recherche pour le développement [IRD] – CNES – Observatoire Midi-Pyrénées – INSU – Université Paul Sabatier [UPS] - Toulouse III |
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| Subject | : | Sciences of the Universe/Earth Sciences/Oceanography |
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| Two-way nesting – Finite difference method – Modeling – Boundary conditions – Coastal upwelling |
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| hal-00690731, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00690731 | |
| oai:hal.archives-ouvertes.fr:hal-00690731 | |
| From: Francoise Cudennec | |
| Submitted on: Tuesday, 24 April 2012 11:57:15 | |
| Updated on: Tuesday, 24 April 2012 11:57:15 | |
