Boundary conditions control in ORCA2
National audience A 4D-Var data assimilation technique is applied to ORCA-2 configuration of the NEMO in order to identify the optimal parametrization of boundary conditions on the lateral boundaries as well as on the bottom and on the surface of the ocean. The influence of boundary conditions on th...
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ftccsdartic:oai:HAL:hal-00925863v1 2023-05-15T17:53:44+02:00 Boundary conditions control in ORCA2 Kazantsev, Eugene Modelling, Observations, Identification for Environmental Sciences (MOISE) Inria Grenoble - Rhône-Alpes Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire Jean Kuntzmann (LJK) Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS) Action MANU du programme LEFE Paris, France 2013-02-12 https://hal.inria.fr/hal-00925863 https://hal.inria.fr/hal-00925863/document https://hal.inria.fr/hal-00925863/file/orca-paris.pdf en eng HAL CCSD hal-00925863 https://hal.inria.fr/hal-00925863 https://hal.inria.fr/hal-00925863/document https://hal.inria.fr/hal-00925863/file/orca-paris.pdf info:eu-repo/semantics/OpenAccess Journée thématique - Que peuvent attendre les modélisateurs de l'assimilation ? https://hal.inria.fr/hal-00925863 Journée thématique - Que peuvent attendre les modélisateurs de l'assimilation ?, Action MANU du programme LEFE, Feb 2013, Paris, France [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] info:eu-repo/semantics/conferenceObject Conference papers 2013 ftccsdartic 2021-10-24T14:08:47Z National audience A 4D-Var data assimilation technique is applied to ORCA-2 configuration of the NEMO in order to identify the optimal parametrization of boundary conditions on the lateral boundaries as well as on the bottom and on the surface of the ocean. The influence of boundary conditions on the solution is analyzed both within and beyond the assimilation window. It is shown that the optimal bottom and surface boundary conditions allow us to better represent the jet streams, such as Gulf Stream and Kuroshio. Analyzing the reasons of the jets reinforcement, we notice that data assimilation has a major impact on parametrization of the bottom boundary conditions for $u$ and $v$. Automatic generation of the tangent and adjoint codes is also discussed. Tapenade software is shown to be able to produce the adjoint code that can be used after a memory usage optimization. Conference Object Orca Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
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[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] Kazantsev, Eugene Boundary conditions control in ORCA2 |
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[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
description |
National audience A 4D-Var data assimilation technique is applied to ORCA-2 configuration of the NEMO in order to identify the optimal parametrization of boundary conditions on the lateral boundaries as well as on the bottom and on the surface of the ocean. The influence of boundary conditions on the solution is analyzed both within and beyond the assimilation window. It is shown that the optimal bottom and surface boundary conditions allow us to better represent the jet streams, such as Gulf Stream and Kuroshio. Analyzing the reasons of the jets reinforcement, we notice that data assimilation has a major impact on parametrization of the bottom boundary conditions for $u$ and $v$. Automatic generation of the tangent and adjoint codes is also discussed. Tapenade software is shown to be able to produce the adjoint code that can be used after a memory usage optimization. |
author2 |
Modelling, Observations, Identification for Environmental Sciences (MOISE) Inria Grenoble - Rhône-Alpes Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire Jean Kuntzmann (LJK) Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS) Action MANU du programme LEFE |
format |
Conference Object |
author |
Kazantsev, Eugene |
author_facet |
Kazantsev, Eugene |
author_sort |
Kazantsev, Eugene |
title |
Boundary conditions control in ORCA2 |
title_short |
Boundary conditions control in ORCA2 |
title_full |
Boundary conditions control in ORCA2 |
title_fullStr |
Boundary conditions control in ORCA2 |
title_full_unstemmed |
Boundary conditions control in ORCA2 |
title_sort |
boundary conditions control in orca2 |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.inria.fr/hal-00925863 https://hal.inria.fr/hal-00925863/document https://hal.inria.fr/hal-00925863/file/orca-paris.pdf |
op_coverage |
Paris, France |
genre |
Orca |
genre_facet |
Orca |
op_source |
Journée thématique - Que peuvent attendre les modélisateurs de l'assimilation ? https://hal.inria.fr/hal-00925863 Journée thématique - Que peuvent attendre les modélisateurs de l'assimilation ?, Action MANU du programme LEFE, Feb 2013, Paris, France |
op_relation |
hal-00925863 https://hal.inria.fr/hal-00925863 https://hal.inria.fr/hal-00925863/document https://hal.inria.fr/hal-00925863/file/orca-paris.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766161439806980096 |