Loop Current Variability as Trigger of Coherent Gulf Stream Transport Anomalies
International audience Satellite observations and output from a high-resolution ocean model are used to investigate how the Loop Current in the Gulf of Mexico affects the Gulf Stream transport through the Florida Straits. We find that the expansion (contraction) of the Loop Current leads to lower (h...
Published in: | Journal of Physical Oceanography |
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Main Authors: | , , , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2019
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Subjects: | |
Online Access: | https://hal.sorbonne-universite.fr/hal-02281908 https://hal.sorbonne-universite.fr/hal-02281908/document https://hal.sorbonne-universite.fr/hal-02281908/file/jpo-d-18-0236.1.pdf https://doi.org/10.1175/JPO-D-18-0236.1 |
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ftuniversailles:oai:HAL:hal-02281908v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
op_collection_id |
ftuniversailles |
language |
English |
topic |
Ocean circulation Mesoscale processes North Atlantic Ocean Ocean Boundary currents Ocean dynamics [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
Ocean circulation Mesoscale processes North Atlantic Ocean Ocean Boundary currents Ocean dynamics [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Hirschi, Joël J.-M. Frajka-Williams, Eleanor Blaker, Adam T. Sinha, Bablu Coward, Andrew C. Hyder, Pat Biastoch, Arne Böning, Claus W. Barnier, Bernard Penduff, Thierry Garcia, Ixetl Fransner, Filippa Madec, Gurvan Loop Current Variability as Trigger of Coherent Gulf Stream Transport Anomalies |
topic_facet |
Ocean circulation Mesoscale processes North Atlantic Ocean Ocean Boundary currents Ocean dynamics [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Satellite observations and output from a high-resolution ocean model are used to investigate how the Loop Current in the Gulf of Mexico affects the Gulf Stream transport through the Florida Straits. We find that the expansion (contraction) of the Loop Current leads to lower (higher) transports through the Straits of Florida. The associated surface velocity anomalies are coherent from the southwestern tip of Florida to Cape Hatteras. A simple continuity-based argument can be used to explain the link between the Loop Current and the downstream Gulf Stream transport: as the Loop Current lengthens (shortens) its path in the Gulf of Mexico, the flow out of the Gulf decreases (increases). Anomalies in the surface velocity field are first seen to the southwest of Florida and within 4 weeks propagate through the Florida Straits up to Cape Hatteras and into the Gulf Stream Extension. In both the observations and the model this propagation can be seen as pulses in the surface velocities. We estimate that the Loop Current variability can be linked to a variability of several Sverdrups (1Sv =10 6 m 3 s -1 ) through the Florida Straits. The exact timing of the Loop Current variability is largely unpredictable beyond a few weeks and its variability is therefore likely a major contributor to the chaotic/intrinsic variability of the Gulf Stream. However, the time lag between the Loop Current and the flow downstream of the Gulf of Mexico means that if a lengthening/shortening of the Loop Current is observed this introduces some predictability in the downstream flow for a few weeks. |
author2 |
National Oceanography Centre (NOC) United Kingdom Met Office Exeter Helmholtz Centre for Ocean Research Kiel (GEOMAR) Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) University of Bergen (UiB) Nucleus for European Modeling of the Ocean (NEMO R&D ) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) 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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) |
format |
Article in Journal/Newspaper |
author |
Hirschi, Joël J.-M. Frajka-Williams, Eleanor Blaker, Adam T. Sinha, Bablu Coward, Andrew C. Hyder, Pat Biastoch, Arne Böning, Claus W. Barnier, Bernard Penduff, Thierry Garcia, Ixetl Fransner, Filippa Madec, Gurvan |
author_facet |
Hirschi, Joël J.-M. Frajka-Williams, Eleanor Blaker, Adam T. Sinha, Bablu Coward, Andrew C. Hyder, Pat Biastoch, Arne Böning, Claus W. Barnier, Bernard Penduff, Thierry Garcia, Ixetl Fransner, Filippa Madec, Gurvan |
author_sort |
Hirschi, Joël J.-M. |
title |
Loop Current Variability as Trigger of Coherent Gulf Stream Transport Anomalies |
title_short |
Loop Current Variability as Trigger of Coherent Gulf Stream Transport Anomalies |
title_full |
Loop Current Variability as Trigger of Coherent Gulf Stream Transport Anomalies |
title_fullStr |
Loop Current Variability as Trigger of Coherent Gulf Stream Transport Anomalies |
title_full_unstemmed |
Loop Current Variability as Trigger of Coherent Gulf Stream Transport Anomalies |
title_sort |
loop current variability as trigger of coherent gulf stream transport anomalies |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.sorbonne-universite.fr/hal-02281908 https://hal.sorbonne-universite.fr/hal-02281908/document https://hal.sorbonne-universite.fr/hal-02281908/file/jpo-d-18-0236.1.pdf https://doi.org/10.1175/JPO-D-18-0236.1 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0022-3670 EISSN: 1520-0485 Journal of Physical Oceanography https://hal.sorbonne-universite.fr/hal-02281908 Journal of Physical Oceanography, 2019, 49 (8), pp.2115-2132. ⟨10.1175/JPO-D-18-0236.1⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1175/JPO-D-18-0236.1 hal-02281908 https://hal.sorbonne-universite.fr/hal-02281908 https://hal.sorbonne-universite.fr/hal-02281908/document https://hal.sorbonne-universite.fr/hal-02281908/file/jpo-d-18-0236.1.pdf doi:10.1175/JPO-D-18-0236.1 WOS: 000477881900001 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1175/JPO-D-18-0236.1 |
container_title |
Journal of Physical Oceanography |
container_volume |
49 |
container_issue |
8 |
container_start_page |
2115 |
op_container_end_page |
2132 |
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1799485330509791232 |
spelling |
ftuniversailles:oai:HAL:hal-02281908v1 2024-05-19T07:45:19+00:00 Loop Current Variability as Trigger of Coherent Gulf Stream Transport Anomalies Hirschi, Joël J.-M. Frajka-Williams, Eleanor Blaker, Adam T. Sinha, Bablu Coward, Andrew C. Hyder, Pat Biastoch, Arne Böning, Claus W. Barnier, Bernard Penduff, Thierry Garcia, Ixetl Fransner, Filippa Madec, Gurvan National Oceanography Centre (NOC) United Kingdom Met Office Exeter Helmholtz Centre for Ocean Research Kiel (GEOMAR) Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) University of Bergen (UiB) Nucleus for European Modeling of the Ocean (NEMO R&D ) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) 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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) 2019 https://hal.sorbonne-universite.fr/hal-02281908 https://hal.sorbonne-universite.fr/hal-02281908/document https://hal.sorbonne-universite.fr/hal-02281908/file/jpo-d-18-0236.1.pdf https://doi.org/10.1175/JPO-D-18-0236.1 en eng HAL CCSD American Meteorological Society info:eu-repo/semantics/altIdentifier/doi/10.1175/JPO-D-18-0236.1 hal-02281908 https://hal.sorbonne-universite.fr/hal-02281908 https://hal.sorbonne-universite.fr/hal-02281908/document https://hal.sorbonne-universite.fr/hal-02281908/file/jpo-d-18-0236.1.pdf doi:10.1175/JPO-D-18-0236.1 WOS: 000477881900001 info:eu-repo/semantics/OpenAccess ISSN: 0022-3670 EISSN: 1520-0485 Journal of Physical Oceanography https://hal.sorbonne-universite.fr/hal-02281908 Journal of Physical Oceanography, 2019, 49 (8), pp.2115-2132. ⟨10.1175/JPO-D-18-0236.1⟩ Ocean circulation Mesoscale processes North Atlantic Ocean Ocean Boundary currents Ocean dynamics [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2019 ftuniversailles https://doi.org/10.1175/JPO-D-18-0236.1 2024-04-25T00:31:52Z International audience Satellite observations and output from a high-resolution ocean model are used to investigate how the Loop Current in the Gulf of Mexico affects the Gulf Stream transport through the Florida Straits. We find that the expansion (contraction) of the Loop Current leads to lower (higher) transports through the Straits of Florida. The associated surface velocity anomalies are coherent from the southwestern tip of Florida to Cape Hatteras. A simple continuity-based argument can be used to explain the link between the Loop Current and the downstream Gulf Stream transport: as the Loop Current lengthens (shortens) its path in the Gulf of Mexico, the flow out of the Gulf decreases (increases). Anomalies in the surface velocity field are first seen to the southwest of Florida and within 4 weeks propagate through the Florida Straits up to Cape Hatteras and into the Gulf Stream Extension. In both the observations and the model this propagation can be seen as pulses in the surface velocities. We estimate that the Loop Current variability can be linked to a variability of several Sverdrups (1Sv =10 6 m 3 s -1 ) through the Florida Straits. The exact timing of the Loop Current variability is largely unpredictable beyond a few weeks and its variability is therefore likely a major contributor to the chaotic/intrinsic variability of the Gulf Stream. However, the time lag between the Loop Current and the flow downstream of the Gulf of Mexico means that if a lengthening/shortening of the Loop Current is observed this introduces some predictability in the downstream flow for a few weeks. Article in Journal/Newspaper North Atlantic Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Journal of Physical Oceanography 49 8 2115 2132 |