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

Eugene Kazantsev 1 Florian Lemarié 1 Eric Blayo 1 
1 AIRSEA - Mathematics and computing applied to oceanic and atmospheric flows
Inria Grenoble - Rhône-Alpes, Grenoble INP - Institut polytechnique de Grenoble - Grenoble Institute of Technology, UGA [2016-2019] - Université Grenoble Alpes [2016-2019], LJK - Laboratoire Jean Kuntzmann
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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Submitted on : Tuesday, December 13, 2016 - 9:04:27 AM
Last modification on : Friday, April 22, 2022 - 1:30:02 PM
Long-term archiving on: : Tuesday, March 14, 2017 - 12:13:52 PM


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  • HAL Id : hal-01415345, version 1



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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