Three-dimensional reconstruction of oceanic mesoscale currents from surface information - art. no. C09005
The ability to reconstruct the three-dimensional (3D) dynamics of the ocean by an effective version of Surface Quasi-Geostrophy (eSQG) is examined. Using the fact that surface density plays an analogous role as interior potential vorticity (PV), the eSQG method consists in inverting the QG PV genera...
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ftarchimer:oai:archimer.ifremer.fr:4620 2023-05-15T17:34:28+02:00 Three-dimensional reconstruction of oceanic mesoscale currents from surface information - art. no. C09005 Isern-fontanet, Jordi Lapeyre, Guillaume Klein, Patrice Chapron, Bertrand Hecht, M 2008-09 application/pdf https://archimer.ifremer.fr/doc/2008/publication-4620.pdf https://doi.org/10.1029/2007JC004692 https://archimer.ifremer.fr/doc/00000/4620/ eng eng American Geophysical Union https://archimer.ifremer.fr/doc/2008/publication-4620.pdf doi:10.1029/2007JC004692 https://archimer.ifremer.fr/doc/00000/4620/ 2008 American Geophysical Union info:eu-repo/semantics/openAccess restricted use Journal of Geophysical Research - Oceans (0148-0227) (American Geophysical Union), 2008-09 , Vol. 113 , N. C9 , P. NIL_153-NIL_169 3D dynamics reconstruction SST Surface Quasi Geostrophy text Publication info:eu-repo/semantics/article 2008 ftarchimer https://doi.org/10.1029/2007JC004692 2021-09-23T20:16:13Z The ability to reconstruct the three-dimensional (3D) dynamics of the ocean by an effective version of Surface Quasi-Geostrophy (eSQG) is examined. Using the fact that surface density plays an analogous role as interior potential vorticity (PV), the eSQG method consists in inverting the QG PV generated by sea-surface density only. We also make the extra assumption that sea-surface temperature (SST) anomalies fully represent surface density anomalies. This approach requires a single snapshot of SST and the setup of two parameters: the mean Brunt-Vaisala frequency and a parameter that determines the energy level at the ocean surface. The validity of this approach is tested using an Ocean General Circulation Model simulation representing the North Atlantic in winter. It is shown that the method is quite successful in reconstructing the velocity field at the ocean surface for mesoscales (between 30 and 300 km). The eSQG framework can also be applied to reconstruct subsurface fields using surface information. Results show that the reconstruction of velocities and vorticity from surface fields is reasonably good for the upper 500 m and that the success of the method mainly depends on the quality of the SST as a proxy of the density anomaly at the base of the mixed layer. This situation happens after a mixed-layer deepening period. Therefore the ideal situation for the application of this method would be after strong wind events. Article in Journal/Newspaper North Atlantic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Journal of Geophysical Research 113 C9 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
3D dynamics reconstruction SST Surface Quasi Geostrophy |
spellingShingle |
3D dynamics reconstruction SST Surface Quasi Geostrophy Isern-fontanet, Jordi Lapeyre, Guillaume Klein, Patrice Chapron, Bertrand Hecht, M Three-dimensional reconstruction of oceanic mesoscale currents from surface information - art. no. C09005 |
topic_facet |
3D dynamics reconstruction SST Surface Quasi Geostrophy |
description |
The ability to reconstruct the three-dimensional (3D) dynamics of the ocean by an effective version of Surface Quasi-Geostrophy (eSQG) is examined. Using the fact that surface density plays an analogous role as interior potential vorticity (PV), the eSQG method consists in inverting the QG PV generated by sea-surface density only. We also make the extra assumption that sea-surface temperature (SST) anomalies fully represent surface density anomalies. This approach requires a single snapshot of SST and the setup of two parameters: the mean Brunt-Vaisala frequency and a parameter that determines the energy level at the ocean surface. The validity of this approach is tested using an Ocean General Circulation Model simulation representing the North Atlantic in winter. It is shown that the method is quite successful in reconstructing the velocity field at the ocean surface for mesoscales (between 30 and 300 km). The eSQG framework can also be applied to reconstruct subsurface fields using surface information. Results show that the reconstruction of velocities and vorticity from surface fields is reasonably good for the upper 500 m and that the success of the method mainly depends on the quality of the SST as a proxy of the density anomaly at the base of the mixed layer. This situation happens after a mixed-layer deepening period. Therefore the ideal situation for the application of this method would be after strong wind events. |
format |
Article in Journal/Newspaper |
author |
Isern-fontanet, Jordi Lapeyre, Guillaume Klein, Patrice Chapron, Bertrand Hecht, M |
author_facet |
Isern-fontanet, Jordi Lapeyre, Guillaume Klein, Patrice Chapron, Bertrand Hecht, M |
author_sort |
Isern-fontanet, Jordi |
title |
Three-dimensional reconstruction of oceanic mesoscale currents from surface information - art. no. C09005 |
title_short |
Three-dimensional reconstruction of oceanic mesoscale currents from surface information - art. no. C09005 |
title_full |
Three-dimensional reconstruction of oceanic mesoscale currents from surface information - art. no. C09005 |
title_fullStr |
Three-dimensional reconstruction of oceanic mesoscale currents from surface information - art. no. C09005 |
title_full_unstemmed |
Three-dimensional reconstruction of oceanic mesoscale currents from surface information - art. no. C09005 |
title_sort |
three-dimensional reconstruction of oceanic mesoscale currents from surface information - art. no. c09005 |
publisher |
American Geophysical Union |
publishDate |
2008 |
url |
https://archimer.ifremer.fr/doc/2008/publication-4620.pdf https://doi.org/10.1029/2007JC004692 https://archimer.ifremer.fr/doc/00000/4620/ |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Journal of Geophysical Research - Oceans (0148-0227) (American Geophysical Union), 2008-09 , Vol. 113 , N. C9 , P. NIL_153-NIL_169 |
op_relation |
https://archimer.ifremer.fr/doc/2008/publication-4620.pdf doi:10.1029/2007JC004692 https://archimer.ifremer.fr/doc/00000/4620/ |
op_rights |
2008 American Geophysical Union info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1029/2007JC004692 |
container_title |
Journal of Geophysical Research |
container_volume |
113 |
container_issue |
C9 |
_version_ |
1766133314613149696 |