# Lateral Boundary Conditions at the staircase-like boundary of ocean models

1 AIRSEA - Mathematics and computing applied to oceanic and atmospheric flows
Grenoble INP - Institut polytechnique de Grenoble - Grenoble Institute of Technology, UGA - Université Grenoble Alpes, LJK - Laboratoire Jean Kuntzmann, Inria Grenoble - Rhône-Alpes
Abstract : A 4D-Var data assimilation technique is applied to a rectangular-box configuration of the NEMO in order to analyze the optimal parametrization of boun\-dary conditions at lateral boundaries. The impact of staircase-shaped coastlines is studied by rotating the model grid around the center of the box. Rotations on $30^\circ$ and $45^\circ$ are studied with single and double gyre forcing patterns. It is shown that optimized boundary conditions compensate the errors induced by the staircase-like approximation of the coastline.
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Conference papers
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https://hal.inria.fr/hal-01415345
Contributor : Eugene Kazantsev <>
Submitted on : Tuesday, December 13, 2016 - 9:04:27 AM
Last modification on : Tuesday, March 5, 2019 - 9:18:01 AM
Long-term archiving on: Tuesday, March 14, 2017 - 12:13:52 PM

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paco-cna16.pdf
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• HAL Id : hal-01415345, version 1

### Citation

Eugene Kazantsev, Florian Lemarié, Eric Blayo. Lateral Boundary Conditions at the staircase-like boundary of ocean models. 6ème Colloque National d'Assimilation de données, Nov 2016, Grenoble, France. ⟨hal-01415345⟩

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