Lagrangian Eddy Scales in the Northern Atlantic Ocean.
International audience Eddy time and length scales are calculated from surface drifter and subsurface float observations in the northern Atlantic Ocean. Outside the energetic Gulf Stream, subsurface timescales are relatively constant at depths from 700 m to 2000 m. Length scale and the characteristi...
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ftunivnantes:oai:HAL:hal-00268200v1 2023-05-15T17:33:31+02:00 Lagrangian Eddy Scales in the Northern Atlantic Ocean. Lumpkin, Rick Tréguier, Anne-Marie Speer, Kevin Department of Oceanography Florida State University Tallahassee (FSU) 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) 2002-09 https://hal.science/hal-00268200 https://doi.org/10.1175/1520-0485(2002)032<2425:LESITN>2.0.CO;2 en eng HAL CCSD American Meteorological Society info:eu-repo/semantics/altIdentifier/doi/10.1175/1520-0485(2002)032<2425:LESITN>2.0.CO;2 hal-00268200 https://hal.science/hal-00268200 doi:10.1175/1520-0485(2002)032<2425:LESITN>2.0.CO;2 ISSN: 0022-3670 EISSN: 1520-0485 Journal of Physical Oceanography https://hal.science/hal-00268200 Journal of Physical Oceanography, 2002, 32 (9), pp.2425-2440. ⟨10.1175/1520-0485(2002)0322.0.CO;2⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2002 ftunivnantes https://doi.org/10.1175/1520-0485(2002)032<2425:LESITN>2.0.CO;2 https://doi.org/10.1175/1520-0485(2002)0322.0.CO;2 2023-02-08T06:20:33Z International audience Eddy time and length scales are calculated from surface drifter and subsurface float observations in the northern Atlantic Ocean. Outside the energetic Gulf Stream, subsurface timescales are relatively constant at depths from 700 m to 2000 m. Length scale and the characteristic eddy speed decrease with increasing depth below 700 m, but length scale stays relatively constant in the upper several hundred meters of the Gulf Stream. It is suggested that this behavior is due to the Lagrangian sampling of the mesoscale field, in limits set by the Eulerian eddy scales and the eddy kinetic energy. In high-energy regions of the surface and near-surface North Atlantic, the eddy field is in the “frozen field” Lagrangian sampling regime for which the Lagrangian and Eulerian length scales are proportional. However, throughout much of the deep ocean interior, the eddy field may be in the “fixed float” regime for which the Lagrangian and Eulerian timescales are nearly equal. This does not necessarily imply that the deep interior is nearly linear, as fixed-float sampling is possible in a flow field of O(1) nonlinearity. Article in Journal/Newspaper North Atlantic Université de Nantes: HAL-UNIV-NANTES |
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Université de Nantes: HAL-UNIV-NANTES |
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language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
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[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Lumpkin, Rick Tréguier, Anne-Marie Speer, Kevin Lagrangian Eddy Scales in the Northern Atlantic Ocean. |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Eddy time and length scales are calculated from surface drifter and subsurface float observations in the northern Atlantic Ocean. Outside the energetic Gulf Stream, subsurface timescales are relatively constant at depths from 700 m to 2000 m. Length scale and the characteristic eddy speed decrease with increasing depth below 700 m, but length scale stays relatively constant in the upper several hundred meters of the Gulf Stream. It is suggested that this behavior is due to the Lagrangian sampling of the mesoscale field, in limits set by the Eulerian eddy scales and the eddy kinetic energy. In high-energy regions of the surface and near-surface North Atlantic, the eddy field is in the “frozen field” Lagrangian sampling regime for which the Lagrangian and Eulerian length scales are proportional. However, throughout much of the deep ocean interior, the eddy field may be in the “fixed float” regime for which the Lagrangian and Eulerian timescales are nearly equal. This does not necessarily imply that the deep interior is nearly linear, as fixed-float sampling is possible in a flow field of O(1) nonlinearity. |
author2 |
Department of Oceanography Florida State University Tallahassee (FSU) 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) |
format |
Article in Journal/Newspaper |
author |
Lumpkin, Rick Tréguier, Anne-Marie Speer, Kevin |
author_facet |
Lumpkin, Rick Tréguier, Anne-Marie Speer, Kevin |
author_sort |
Lumpkin, Rick |
title |
Lagrangian Eddy Scales in the Northern Atlantic Ocean. |
title_short |
Lagrangian Eddy Scales in the Northern Atlantic Ocean. |
title_full |
Lagrangian Eddy Scales in the Northern Atlantic Ocean. |
title_fullStr |
Lagrangian Eddy Scales in the Northern Atlantic Ocean. |
title_full_unstemmed |
Lagrangian Eddy Scales in the Northern Atlantic Ocean. |
title_sort |
lagrangian eddy scales in the northern atlantic ocean. |
publisher |
HAL CCSD |
publishDate |
2002 |
url |
https://hal.science/hal-00268200 https://doi.org/10.1175/1520-0485(2002)032<2425:LESITN>2.0.CO;2 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0022-3670 EISSN: 1520-0485 Journal of Physical Oceanography https://hal.science/hal-00268200 Journal of Physical Oceanography, 2002, 32 (9), pp.2425-2440. ⟨10.1175/1520-0485(2002)0322.0.CO;2⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1175/1520-0485(2002)032<2425:LESITN>2.0.CO;2 hal-00268200 https://hal.science/hal-00268200 doi:10.1175/1520-0485(2002)032<2425:LESITN>2.0.CO;2 |
op_doi |
https://doi.org/10.1175/1520-0485(2002)032<2425:LESITN>2.0.CO;2 https://doi.org/10.1175/1520-0485(2002)0322.0.CO;2 |
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1766132057565560832 |