Observations of Irminger Sea Anticyclonic Eddies
International audience Mesoscale anticyclonic eddies in the Irminger Sea are observed using a mooring and a glider. Between 2002 and 2009, the mooring observed 53 anticyclones. Using a kinematic model, objective estimates of eddy length scales and velocity structure are made for 16 eddies. Anticyclo...
Published in: | Journal of Physical Oceanography |
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Main Authors: | , , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2013
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Online Access: | https://hal.science/hal-00836621 https://hal.science/hal-00836621/document https://hal.science/hal-00836621/file/%5B15200485%20-%20Journal%20of%20Physical%20Oceanography%5D%20Observations%20of%20Irminger%20Sea%20Anticyclonic%20Eddies.pdf https://doi.org/10.1175/JPO-D-11-0155.1 |
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ftepunivpsaclay:oai:HAL:hal-00836621v1 |
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openpolar |
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Open Polar |
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École Polytechnique, Université Paris-Saclay: HAL |
op_collection_id |
ftepunivpsaclay |
language |
English |
topic |
Mesoscale processes Eddies North Atlantic Ocean [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
Mesoscale processes Eddies North Atlantic Ocean [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Fan, Xue Send, Uwe Testor, Pierre Karstensen, Johannes Lherminier, Pascale Observations of Irminger Sea Anticyclonic Eddies |
topic_facet |
Mesoscale processes Eddies North Atlantic Ocean [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Mesoscale anticyclonic eddies in the Irminger Sea are observed using a mooring and a glider. Between 2002 and 2009, the mooring observed 53 anticyclones. Using a kinematic model, objective estimates of eddy length scales and velocity structure are made for 16 eddies. Anticyclones had a mean core diameter of 12 km, and their mean peak observed azimuthal speed was 0.1 m s −1 . They had core salinities and potential temperatures of 34.91-34.98 and 4.48°-5.34°C, respectively, making them warm and salty features. These properties represent a typical salinity anomaly of 0.03 and a temperature anomaly of 0.28°C from noneddy values. All eddies had small (≪1) Rossby numbers. In 2006, the glider observed two anticyclones having diameters of about 20 km and peak azimuthal speeds of about 0.3 m s −1 . Similar salinity anomalies were detected throughout the Irminger Sea by floats profiling in anticyclones. Two formation regions for the eddies are identified: one to the west of the Reykjanes Ridge and the other off the East Greenland Irminger Current near Cape Farewell close to the mooring. Observations indicate that eddies formed in the former region are larger than eddies observed at the mooring. A clear increase in eddy salinity is observed between 2002 and 2009. The observed breakup of these eddies in winter implies that they are a source of salt for the central gyre. The anticyclones are similar to those found in both the Labrador Sea and Norwegian Sea, making them a ubiquitous feature of the subpolar North Atlantic basins. |
author2 |
Scripps Institution of Oceanography (SIO - UC San Diego) University of California San Diego (UC San Diego) University of California (UC)-University of California (UC) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Leibniz-Institut für Meereswissenschaften (IFM-GEOMAR) 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 |
Fan, Xue Send, Uwe Testor, Pierre Karstensen, Johannes Lherminier, Pascale |
author_facet |
Fan, Xue Send, Uwe Testor, Pierre Karstensen, Johannes Lherminier, Pascale |
author_sort |
Fan, Xue |
title |
Observations of Irminger Sea Anticyclonic Eddies |
title_short |
Observations of Irminger Sea Anticyclonic Eddies |
title_full |
Observations of Irminger Sea Anticyclonic Eddies |
title_fullStr |
Observations of Irminger Sea Anticyclonic Eddies |
title_full_unstemmed |
Observations of Irminger Sea Anticyclonic Eddies |
title_sort |
observations of irminger sea anticyclonic eddies |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.science/hal-00836621 https://hal.science/hal-00836621/document https://hal.science/hal-00836621/file/%5B15200485%20-%20Journal%20of%20Physical%20Oceanography%5D%20Observations%20of%20Irminger%20Sea%20Anticyclonic%20Eddies.pdf https://doi.org/10.1175/JPO-D-11-0155.1 |
genre |
Cape Farewell East Greenland Greenland Labrador Sea North Atlantic Norwegian Sea |
genre_facet |
Cape Farewell East Greenland Greenland Labrador Sea North Atlantic Norwegian Sea |
op_source |
ISSN: 0022-3670 EISSN: 1520-0485 Journal of Physical Oceanography https://hal.science/hal-00836621 Journal of Physical Oceanography, 2013, 43 (4), pp.805-823. ⟨10.1175/JPO-D-11-0155.1⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1175/JPO-D-11-0155.1 hal-00836621 https://hal.science/hal-00836621 https://hal.science/hal-00836621/document https://hal.science/hal-00836621/file/%5B15200485%20-%20Journal%20of%20Physical%20Oceanography%5D%20Observations%20of%20Irminger%20Sea%20Anticyclonic%20Eddies.pdf BIBCODE: 2013JPO.43.805F doi:10.1175/JPO-D-11-0155.1 WOS: 000317917500008 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1175/JPO-D-11-0155.1 |
container_title |
Journal of Physical Oceanography |
container_volume |
43 |
container_issue |
4 |
container_start_page |
805 |
op_container_end_page |
823 |
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1799478269158883328 |
spelling |
ftepunivpsaclay:oai:HAL:hal-00836621v1 2024-05-19T07:38:46+00:00 Observations of Irminger Sea Anticyclonic Eddies Fan, Xue Send, Uwe Testor, Pierre Karstensen, Johannes Lherminier, Pascale Scripps Institution of Oceanography (SIO - UC San Diego) University of California San Diego (UC San Diego) University of California (UC)-University of California (UC) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Leibniz-Institut für Meereswissenschaften (IFM-GEOMAR) 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) 2013 https://hal.science/hal-00836621 https://hal.science/hal-00836621/document https://hal.science/hal-00836621/file/%5B15200485%20-%20Journal%20of%20Physical%20Oceanography%5D%20Observations%20of%20Irminger%20Sea%20Anticyclonic%20Eddies.pdf https://doi.org/10.1175/JPO-D-11-0155.1 en eng HAL CCSD American Meteorological Society info:eu-repo/semantics/altIdentifier/doi/10.1175/JPO-D-11-0155.1 hal-00836621 https://hal.science/hal-00836621 https://hal.science/hal-00836621/document https://hal.science/hal-00836621/file/%5B15200485%20-%20Journal%20of%20Physical%20Oceanography%5D%20Observations%20of%20Irminger%20Sea%20Anticyclonic%20Eddies.pdf BIBCODE: 2013JPO.43.805F doi:10.1175/JPO-D-11-0155.1 WOS: 000317917500008 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0022-3670 EISSN: 1520-0485 Journal of Physical Oceanography https://hal.science/hal-00836621 Journal of Physical Oceanography, 2013, 43 (4), pp.805-823. ⟨10.1175/JPO-D-11-0155.1⟩ Mesoscale processes Eddies North Atlantic Ocean [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2013 ftepunivpsaclay https://doi.org/10.1175/JPO-D-11-0155.1 2024-04-25T00:40:38Z International audience Mesoscale anticyclonic eddies in the Irminger Sea are observed using a mooring and a glider. Between 2002 and 2009, the mooring observed 53 anticyclones. Using a kinematic model, objective estimates of eddy length scales and velocity structure are made for 16 eddies. Anticyclones had a mean core diameter of 12 km, and their mean peak observed azimuthal speed was 0.1 m s −1 . They had core salinities and potential temperatures of 34.91-34.98 and 4.48°-5.34°C, respectively, making them warm and salty features. These properties represent a typical salinity anomaly of 0.03 and a temperature anomaly of 0.28°C from noneddy values. All eddies had small (≪1) Rossby numbers. In 2006, the glider observed two anticyclones having diameters of about 20 km and peak azimuthal speeds of about 0.3 m s −1 . Similar salinity anomalies were detected throughout the Irminger Sea by floats profiling in anticyclones. Two formation regions for the eddies are identified: one to the west of the Reykjanes Ridge and the other off the East Greenland Irminger Current near Cape Farewell close to the mooring. Observations indicate that eddies formed in the former region are larger than eddies observed at the mooring. A clear increase in eddy salinity is observed between 2002 and 2009. The observed breakup of these eddies in winter implies that they are a source of salt for the central gyre. The anticyclones are similar to those found in both the Labrador Sea and Norwegian Sea, making them a ubiquitous feature of the subpolar North Atlantic basins. Article in Journal/Newspaper Cape Farewell East Greenland Greenland Labrador Sea North Atlantic Norwegian Sea École Polytechnique, Université Paris-Saclay: HAL Journal of Physical Oceanography 43 4 805 823 |