Three-dimensional reconstruction of oceanic mesoscale currents from surface information.
International audience 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 inv...
Published in: | Journal of Geophysical Research |
---|---|
Main Authors: | , , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2008
|
Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-00405675 https://doi.org/10.1029/2007JC004692 |
id |
ftccsdartic:oai:HAL:hal-00405675v1 |
---|---|
record_format |
openpolar |
spelling |
ftccsdartic:oai:HAL:hal-00405675v1 2023-05-15T17:34:30+02:00 Three-dimensional reconstruction of oceanic mesoscale currents from surface information. Isern-Fontanet, Jordi Lapeyre, Guillaume Klein, Patrice Chapron, Bertrand W. Hecht, Matthew Laboratoire d'Océanographie Spatiale (LOS) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL) Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Computational Physics Group Los Alamos National Laboratory (LANL) 2008 https://hal.archives-ouvertes.fr/hal-00405675 https://doi.org/10.1029/2007JC004692 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1029/2007JC004692 hal-00405675 https://hal.archives-ouvertes.fr/hal-00405675 doi:10.1029/2007JC004692 ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.archives-ouvertes.fr/hal-00405675 Journal of Geophysical Research. Oceans, Wiley-Blackwell, 2008, 113, pp.C09005. ⟨10.1029/2007JC004692⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2008 ftccsdartic https://doi.org/10.1029/2007JC004692 2021-04-04T00:09:48Z International audience 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-Väisälä 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 Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Journal of Geophysical Research 113 C9 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Isern-Fontanet, Jordi Lapeyre, Guillaume Klein, Patrice Chapron, Bertrand W. Hecht, Matthew Three-dimensional reconstruction of oceanic mesoscale currents from surface information. |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience 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-Väisälä 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. |
author2 |
Laboratoire d'Océanographie Spatiale (LOS) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL) Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Computational Physics Group Los Alamos National Laboratory (LANL) |
format |
Article in Journal/Newspaper |
author |
Isern-Fontanet, Jordi Lapeyre, Guillaume Klein, Patrice Chapron, Bertrand W. Hecht, Matthew |
author_facet |
Isern-Fontanet, Jordi Lapeyre, Guillaume Klein, Patrice Chapron, Bertrand W. Hecht, Matthew |
author_sort |
Isern-Fontanet, Jordi |
title |
Three-dimensional reconstruction of oceanic mesoscale currents from surface information. |
title_short |
Three-dimensional reconstruction of oceanic mesoscale currents from surface information. |
title_full |
Three-dimensional reconstruction of oceanic mesoscale currents from surface information. |
title_fullStr |
Three-dimensional reconstruction of oceanic mesoscale currents from surface information. |
title_full_unstemmed |
Three-dimensional reconstruction of oceanic mesoscale currents from surface information. |
title_sort |
three-dimensional reconstruction of oceanic mesoscale currents from surface information. |
publisher |
HAL CCSD |
publishDate |
2008 |
url |
https://hal.archives-ouvertes.fr/hal-00405675 https://doi.org/10.1029/2007JC004692 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.archives-ouvertes.fr/hal-00405675 Journal of Geophysical Research. Oceans, Wiley-Blackwell, 2008, 113, pp.C09005. ⟨10.1029/2007JC004692⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2007JC004692 hal-00405675 https://hal.archives-ouvertes.fr/hal-00405675 doi:10.1029/2007JC004692 |
op_doi |
https://doi.org/10.1029/2007JC004692 |
container_title |
Journal of Geophysical Research |
container_volume |
113 |
container_issue |
C9 |
_version_ |
1766133357743177728 |