Optimal Boundary Conditions for ORCA-2 Model
International 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 c...
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ftunivrennes1hal:oai:HAL:hal-00764570v1 2024-05-19T07:46:46+00:00 Optimal Boundary Conditions for ORCA-2 Model 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) 2013-08-01 https://inria.hal.science/hal-00764570 https://inria.hal.science/hal-00764570/document https://inria.hal.science/hal-00764570/file/orca.pdf https://doi.org/10.1007/s10236-013-0639-8 en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/arxiv/1212.3116 info:eu-repo/semantics/altIdentifier/doi/10.1007/s10236-013-0639-8 hal-00764570 https://inria.hal.science/hal-00764570 https://inria.hal.science/hal-00764570/document https://inria.hal.science/hal-00764570/file/orca.pdf ARXIV: 1212.3116 doi:10.1007/s10236-013-0639-8 info:eu-repo/semantics/OpenAccess ISSN: 1616-7341 EISSN: 1616-7228 Ocean Dynamics https://inria.hal.science/hal-00764570 Ocean Dynamics, 2013, 63 (8), pp.943-959. ⟨10.1007/s10236-013-0639-8⟩ Variational Data Assimilation Boundary conditions ORCA-2 model [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/article Journal articles 2013 ftunivrennes1hal https://doi.org/10.1007/s10236-013-0639-8 2024-05-01T23:51:52Z International 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. Article in Journal/Newspaper Orca Université de Rennes 1: Publications scientifiques (HAL) Ocean Dynamics 63 8 943 959 |
institution |
Open Polar |
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Université de Rennes 1: Publications scientifiques (HAL) |
op_collection_id |
ftunivrennes1hal |
language |
English |
topic |
Variational Data Assimilation Boundary conditions ORCA-2 model [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 |
Variational Data Assimilation Boundary conditions ORCA-2 model [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 Optimal Boundary Conditions for ORCA-2 Model |
topic_facet |
Variational Data Assimilation Boundary conditions ORCA-2 model [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 |
International 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 |
Article in Journal/Newspaper |
author |
Kazantsev, Eugene |
author_facet |
Kazantsev, Eugene |
author_sort |
Kazantsev, Eugene |
title |
Optimal Boundary Conditions for ORCA-2 Model |
title_short |
Optimal Boundary Conditions for ORCA-2 Model |
title_full |
Optimal Boundary Conditions for ORCA-2 Model |
title_fullStr |
Optimal Boundary Conditions for ORCA-2 Model |
title_full_unstemmed |
Optimal Boundary Conditions for ORCA-2 Model |
title_sort |
optimal boundary conditions for orca-2 model |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://inria.hal.science/hal-00764570 https://inria.hal.science/hal-00764570/document https://inria.hal.science/hal-00764570/file/orca.pdf https://doi.org/10.1007/s10236-013-0639-8 |
genre |
Orca |
genre_facet |
Orca |
op_source |
ISSN: 1616-7341 EISSN: 1616-7228 Ocean Dynamics https://inria.hal.science/hal-00764570 Ocean Dynamics, 2013, 63 (8), pp.943-959. ⟨10.1007/s10236-013-0639-8⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/arxiv/1212.3116 info:eu-repo/semantics/altIdentifier/doi/10.1007/s10236-013-0639-8 hal-00764570 https://inria.hal.science/hal-00764570 https://inria.hal.science/hal-00764570/document https://inria.hal.science/hal-00764570/file/orca.pdf ARXIV: 1212.3116 doi:10.1007/s10236-013-0639-8 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1007/s10236-013-0639-8 |
container_title |
Ocean Dynamics |
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63 |
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8 |
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943 |
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959 |
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