Multiple Zonal Jets in a Quasigeostrophic Model of the Antarctic Circumpolar Current.
International audience The presence of multiple zonal fronts in the Antarctic Circumpolar Current (ACC), a phenomenon described as zonation, has been confirmed by many observations suggesting that the fronts are circumpolar in extent. In the context of quasigeostrophic turbulence models, Panetta has...
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ftunivnantes:oai:HAL:hal-00268294v1 2023-05-15T14:00:44+02:00 Multiple Zonal Jets in a Quasigeostrophic Model of the Antarctic Circumpolar Current. Tréguier, Anne-Marie Panetta, R.L. 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) Department of Meteorology Texas A&M University College Station 1994-11 https://hal.science/hal-00268294 https://doi.org/10.1175/1520-0485(1994)024<2263:MZJIAQ>2.0.CO;2 en eng HAL CCSD American Meteorological Society info:eu-repo/semantics/altIdentifier/doi/10.1175/1520-0485(1994)024<2263:MZJIAQ>2.0.CO;2 hal-00268294 https://hal.science/hal-00268294 doi:10.1175/1520-0485(1994)024<2263:MZJIAQ>2.0.CO;2 ISSN: 0022-3670 EISSN: 1520-0485 Journal of Physical Oceanography https://hal.science/hal-00268294 Journal of Physical Oceanography, 1994, 24 (11), pp.2263-2277. ⟨10.1175/1520-0485(1994)0242.0.CO;2⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 1994 ftunivnantes https://doi.org/10.1175/1520-0485(1994)024<2263:MZJIAQ>2.0.CO;2 https://doi.org/10.1175/1520-0485(1994)0242.0.CO;2 2023-02-08T06:20:26Z International audience The presence of multiple zonal fronts in the Antarctic Circumpolar Current (ACC), a phenomenon described as zonation, has been confirmed by many observations suggesting that the fronts are circumpolar in extent. In the context of quasigeostrophic turbulence models, Panetta has shown that fronts associated with long-lived zonal jets develop spontaneously in very wide baroclinically unstable regions (of width large compared with the Rossby radius of deformation). The present paper examines the relevance of this mechanism to the zonation of the ACC, using a quasigeostrophic wind-forced channel model. Multiple jets appear when the forcing scale is wide enough. and they have horizontal scales and a strength that compares well with observations. However, in the presence of large-scale random topography, a different dynamical regime emerges in which the flow structure depends on the topographically controlled stationary eddies. Article in Journal/Newspaper Antarc* Antarctic Université de Nantes: HAL-UNIV-NANTES Antarctic The Antarctic |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
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 Tréguier, Anne-Marie Panetta, R.L. Multiple Zonal Jets in a Quasigeostrophic Model of the Antarctic Circumpolar Current. |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience The presence of multiple zonal fronts in the Antarctic Circumpolar Current (ACC), a phenomenon described as zonation, has been confirmed by many observations suggesting that the fronts are circumpolar in extent. In the context of quasigeostrophic turbulence models, Panetta has shown that fronts associated with long-lived zonal jets develop spontaneously in very wide baroclinically unstable regions (of width large compared with the Rossby radius of deformation). The present paper examines the relevance of this mechanism to the zonation of the ACC, using a quasigeostrophic wind-forced channel model. Multiple jets appear when the forcing scale is wide enough. and they have horizontal scales and a strength that compares well with observations. However, in the presence of large-scale random topography, a different dynamical regime emerges in which the flow structure depends on the topographically controlled stationary eddies. |
author2 |
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) Department of Meteorology Texas A&M University College Station |
format |
Article in Journal/Newspaper |
author |
Tréguier, Anne-Marie Panetta, R.L. |
author_facet |
Tréguier, Anne-Marie Panetta, R.L. |
author_sort |
Tréguier, Anne-Marie |
title |
Multiple Zonal Jets in a Quasigeostrophic Model of the Antarctic Circumpolar Current. |
title_short |
Multiple Zonal Jets in a Quasigeostrophic Model of the Antarctic Circumpolar Current. |
title_full |
Multiple Zonal Jets in a Quasigeostrophic Model of the Antarctic Circumpolar Current. |
title_fullStr |
Multiple Zonal Jets in a Quasigeostrophic Model of the Antarctic Circumpolar Current. |
title_full_unstemmed |
Multiple Zonal Jets in a Quasigeostrophic Model of the Antarctic Circumpolar Current. |
title_sort |
multiple zonal jets in a quasigeostrophic model of the antarctic circumpolar current. |
publisher |
HAL CCSD |
publishDate |
1994 |
url |
https://hal.science/hal-00268294 https://doi.org/10.1175/1520-0485(1994)024<2263:MZJIAQ>2.0.CO;2 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
ISSN: 0022-3670 EISSN: 1520-0485 Journal of Physical Oceanography https://hal.science/hal-00268294 Journal of Physical Oceanography, 1994, 24 (11), pp.2263-2277. ⟨10.1175/1520-0485(1994)0242.0.CO;2⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1175/1520-0485(1994)024<2263:MZJIAQ>2.0.CO;2 hal-00268294 https://hal.science/hal-00268294 doi:10.1175/1520-0485(1994)024<2263:MZJIAQ>2.0.CO;2 |
op_doi |
https://doi.org/10.1175/1520-0485(1994)024<2263:MZJIAQ>2.0.CO;2 https://doi.org/10.1175/1520-0485(1994)0242.0.CO;2 |
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