Optimal Boundary Conditions for ORCA-2 Model.
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 soluti...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.370.2623 2023-05-15T17:53:19+02:00 Optimal Boundary Conditions for ORCA-2 Model. Eugene Kazantsev The Pennsylvania State University CiteSeerX Archives 2012 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.370.2623 http://hal.inria.fr/docs/00/76/45/70/PDF/orca.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.370.2623 http://hal.inria.fr/docs/00/76/45/70/PDF/orca.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://hal.inria.fr/docs/00/76/45/70/PDF/orca.pdf Variational Data Assimilation Boundary conditions ORCA-2 model text 2012 ftciteseerx 2016-01-08T01:16:30Z 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. Text Orca Unknown |
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ftciteseerx |
language |
English |
topic |
Variational Data Assimilation Boundary conditions ORCA-2 model |
spellingShingle |
Variational Data Assimilation Boundary conditions ORCA-2 model Eugene Kazantsev Optimal Boundary Conditions for ORCA-2 Model. |
topic_facet |
Variational Data Assimilation Boundary conditions ORCA-2 model |
description |
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 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Eugene Kazantsev |
author_facet |
Eugene Kazantsev |
author_sort |
Eugene Kazantsev |
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. |
publishDate |
2012 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.370.2623 http://hal.inria.fr/docs/00/76/45/70/PDF/orca.pdf |
genre |
Orca |
genre_facet |
Orca |
op_source |
http://hal.inria.fr/docs/00/76/45/70/PDF/orca.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.370.2623 http://hal.inria.fr/docs/00/76/45/70/PDF/orca.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766161017729974272 |