Boundary conditions control in ORCA2
National audience A 4D-Var data assimilation technique is applied to a ORCA-2 configuration of the NEMO in order to identify the optimal parametrization of the boundary conditions on the lateral boundaries as well as on the bottom and on the surface of the ocean. The influence of the boundary condit...
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ftunigrenoble:oai:HAL:hal-00764588v1 2024-05-19T07:46:48+00:00 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) Nice, France 2012-12-17 https://inria.hal.science/hal-00764588 https://inria.hal.science/hal-00764588/document https://inria.hal.science/hal-00764588/file/orca.pdf en eng HAL CCSD hal-00764588 https://inria.hal.science/hal-00764588 https://inria.hal.science/hal-00764588/document https://inria.hal.science/hal-00764588/file/orca.pdf info:eu-repo/semantics/OpenAccess 4ème Colloque National sur l'Assimilation des données (2012) https://inria.hal.science/hal-00764588 4ème Colloque National sur l'Assimilation des données (2012), Dec 2012, Nice, France [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] [MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC] info:eu-repo/semantics/conferenceObject Documents associated with scientific events 2012 ftunigrenoble 2024-05-02T00:13:52Z National audience A 4D-Var data assimilation technique is applied to a ORCA-2 configuration of the NEMO in order to identify the optimal parametrization of the boundary conditions on the lateral boundaries as well as on the bottom and on the surface of the ocean. The influence of the boundary conditions on the solution is analyzed as in the assimilation window and beyond the window. It is shown that optimal conditions for vertical operators allows to get stronger and finer jet streams (Gulf Stream, Kuroshio) in the solution. Analyzing the reasons of the jets reinforcement, we see that the major impact of the data assimilation is made on the parametrization of the bottom boundary conditions for lateral velocities 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 Université Grenoble Alpes: HAL |
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Open Polar |
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Université Grenoble Alpes: HAL |
op_collection_id |
ftunigrenoble |
language |
English |
topic |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] [MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC] |
spellingShingle |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] [MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC] Kazantsev, Eugene Boundary conditions control in ORCA2 |
topic_facet |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] [MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC] |
description |
National audience A 4D-Var data assimilation technique is applied to a ORCA-2 configuration of the NEMO in order to identify the optimal parametrization of the boundary conditions on the lateral boundaries as well as on the bottom and on the surface of the ocean. The influence of the boundary conditions on the solution is analyzed as in the assimilation window and beyond the window. It is shown that optimal conditions for vertical operators allows to get stronger and finer jet streams (Gulf Stream, Kuroshio) in the solution. Analyzing the reasons of the jets reinforcement, we see that the major impact of the data assimilation is made on the parametrization of the bottom boundary conditions for lateral velocities 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) |
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 |
2012 |
url |
https://inria.hal.science/hal-00764588 https://inria.hal.science/hal-00764588/document https://inria.hal.science/hal-00764588/file/orca.pdf |
op_coverage |
Nice, France |
genre |
Orca |
genre_facet |
Orca |
op_source |
4ème Colloque National sur l'Assimilation des données (2012) https://inria.hal.science/hal-00764588 4ème Colloque National sur l'Assimilation des données (2012), Dec 2012, Nice, France |
op_relation |
hal-00764588 https://inria.hal.science/hal-00764588 https://inria.hal.science/hal-00764588/document https://inria.hal.science/hal-00764588/file/orca.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1799487049100689408 |