Cyclones and Anticyclones in Seismic Imaging
International audience Nearly all the subsurface eddies detected in seismic imaging of sections in the northeast Atlantic have been assumed to be anticyclones containing Mediterranean Water (MW). Fewer MW cyclones have been observed and studied. In this study, the work of previous numerical studies...
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ftunivnantes:oai:HAL:hal-01494997v1 2023-05-15T17:33:02+02:00 Cyclones and Anticyclones in Seismic Imaging Barbosa Aguiar, A.C. Ménesguen, C. Le Gentil, S. Schopp, R. Carton, Xavier J. Instituto Dom Luiz Universidade de Lisboa = University of Lisbon (ULISBOA) 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) 2015-09 https://hal.univ-brest.fr/hal-01494997 https://doi.org/10.1175/JPO-D-15-0066.1 en eng HAL CCSD American Meteorological Society info:eu-repo/semantics/altIdentifier/doi/10.1175/JPO-D-15-0066.1 hal-01494997 https://hal.univ-brest.fr/hal-01494997 doi:10.1175/JPO-D-15-0066.1 ISSN: 0022-3670 EISSN: 1520-0485 Journal of Physical Oceanography https://hal.univ-brest.fr/hal-01494997 Journal of Physical Oceanography, American Meteorological Society, 2015, 45 (9), pp.2436-2443. ⟨10.1175/JPO-D-15-0066.1⟩ Geographic location/entity North Atlantic Ocean Circulation/ Dynamics Small scale processes Atm/Ocean Structure/ Phenomena Eddies Vortices Observational techniques and algorithms Acoustic measurements/effects Models and modeling Primitive equations model [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2015 ftunivnantes https://doi.org/10.1175/JPO-D-15-0066.1 2022-08-10T07:04:11Z International audience Nearly all the subsurface eddies detected in seismic imaging of sections in the northeast Atlantic have been assumed to be anticyclones containing Mediterranean Water (MW). Fewer MW cyclones have been observed and studied. In this study, the work of previous numerical studies is extended to investigate some characteristics of layering surrounding MW cyclones, using a primitive equation model with equal diffusivities for salinity and temperature to suppress the effects of double diffusion. It is shown that, after a stable state is reached, both anticyclones and cyclones display similar patterns of layering: stacked thin layers of high acoustic reflectivity located above and below the core of each vortex, which do not match isopycnals. The authors conclude that it should not be possible to distinguish between MW cyclones and anticyclones based on their signature in seismic imaging alone. Complementary information is needed to determine the sense of rotation. Article in Journal/Newspaper North Atlantic Northeast Atlantic Université de Nantes: HAL-UNIV-NANTES Journal of Physical Oceanography 45 9 2436 2443 |
institution |
Open Polar |
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Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Geographic location/entity North Atlantic Ocean Circulation/ Dynamics Small scale processes Atm/Ocean Structure/ Phenomena Eddies Vortices Observational techniques and algorithms Acoustic measurements/effects Models and modeling Primitive equations model [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
Geographic location/entity North Atlantic Ocean Circulation/ Dynamics Small scale processes Atm/Ocean Structure/ Phenomena Eddies Vortices Observational techniques and algorithms Acoustic measurements/effects Models and modeling Primitive equations model [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Barbosa Aguiar, A.C. Ménesguen, C. Le Gentil, S. Schopp, R. Carton, Xavier J. Cyclones and Anticyclones in Seismic Imaging |
topic_facet |
Geographic location/entity North Atlantic Ocean Circulation/ Dynamics Small scale processes Atm/Ocean Structure/ Phenomena Eddies Vortices Observational techniques and algorithms Acoustic measurements/effects Models and modeling Primitive equations model [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Nearly all the subsurface eddies detected in seismic imaging of sections in the northeast Atlantic have been assumed to be anticyclones containing Mediterranean Water (MW). Fewer MW cyclones have been observed and studied. In this study, the work of previous numerical studies is extended to investigate some characteristics of layering surrounding MW cyclones, using a primitive equation model with equal diffusivities for salinity and temperature to suppress the effects of double diffusion. It is shown that, after a stable state is reached, both anticyclones and cyclones display similar patterns of layering: stacked thin layers of high acoustic reflectivity located above and below the core of each vortex, which do not match isopycnals. The authors conclude that it should not be possible to distinguish between MW cyclones and anticyclones based on their signature in seismic imaging alone. Complementary information is needed to determine the sense of rotation. |
author2 |
Instituto Dom Luiz Universidade de Lisboa = University of Lisbon (ULISBOA) 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 |
Barbosa Aguiar, A.C. Ménesguen, C. Le Gentil, S. Schopp, R. Carton, Xavier J. |
author_facet |
Barbosa Aguiar, A.C. Ménesguen, C. Le Gentil, S. Schopp, R. Carton, Xavier J. |
author_sort |
Barbosa Aguiar, A.C. |
title |
Cyclones and Anticyclones in Seismic Imaging |
title_short |
Cyclones and Anticyclones in Seismic Imaging |
title_full |
Cyclones and Anticyclones in Seismic Imaging |
title_fullStr |
Cyclones and Anticyclones in Seismic Imaging |
title_full_unstemmed |
Cyclones and Anticyclones in Seismic Imaging |
title_sort |
cyclones and anticyclones in seismic imaging |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.univ-brest.fr/hal-01494997 https://doi.org/10.1175/JPO-D-15-0066.1 |
genre |
North Atlantic Northeast Atlantic |
genre_facet |
North Atlantic Northeast Atlantic |
op_source |
ISSN: 0022-3670 EISSN: 1520-0485 Journal of Physical Oceanography https://hal.univ-brest.fr/hal-01494997 Journal of Physical Oceanography, American Meteorological Society, 2015, 45 (9), pp.2436-2443. ⟨10.1175/JPO-D-15-0066.1⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1175/JPO-D-15-0066.1 hal-01494997 https://hal.univ-brest.fr/hal-01494997 doi:10.1175/JPO-D-15-0066.1 |
op_doi |
https://doi.org/10.1175/JPO-D-15-0066.1 |
container_title |
Journal of Physical Oceanography |
container_volume |
45 |
container_issue |
9 |
container_start_page |
2436 |
op_container_end_page |
2443 |
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1766131398352044032 |