Intra‐ and inter‐annual variability of North Brazil current rings using angular momentum Eddy detection and tracking algorithm: observations from 1993 to 2016
International audience In order to investigate intra- and inter-annual variability of North Brazil Current (NBC) rings, angular momentum eddy detection and tracking algorithm (AMEDA) was used for identification of their occurrence, trajectories, and parameters. Based on 24 years (1993–2016) of geopo...
Published in: | Journal of Geophysical Research: Oceans |
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Main Authors: | , , , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2020
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Subjects: | |
Online Access: | https://hal.science/hal-03145630 https://hal.science/hal-03145630/document https://hal.science/hal-03145630/file/JGR%20Oceans%20-%202020%20-%20Aroucha%20-%20Intra%25E2%2580%2590%20and%20Inter%25E2%2580%2590Annual%20Variability%20of%20North%20Brazil%20Current%20Rings%20Using%20Angular%20Momentum%20Eddy.pdf https://doi.org/10.1029/2019JC015921 |
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ftepunivpsaclay:oai:HAL:hal-03145630v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
École Polytechnique, Université Paris-Saclay: HAL |
op_collection_id |
ftepunivpsaclay |
language |
English |
topic |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
spellingShingle |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] Aroucha, L.C. Veleda, Dóris Lopes, F. S. Tyaquiçã, Pedro Lefèvre, Nathalie Araujo, Moacyr Intra‐ and inter‐annual variability of North Brazil current rings using angular momentum Eddy detection and tracking algorithm: observations from 1993 to 2016 |
topic_facet |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
description |
International audience In order to investigate intra- and inter-annual variability of North Brazil Current (NBC) rings, angular momentum eddy detection and tracking algorithm (AMEDA) was used for identification of their occurrence, trajectories, and parameters. Based on 24 years (1993–2016) of geopotential height and geostrophic current fields reanalysis data from ARMOR 3D (¼°), we identified an average rate of five NBC rings shed by year. The rings present an average lifetime of 15.3 (±5.4) weeks, average speed based radius ($R_{max}$) of 139.8 (±23.6) km, and mean sea surface height anomaly (SSHa) of 9.4 (±4.0) cm. The mean observed maximum azimuthal velocity ($V_{max}$) was 0.27 (±0.08) m/s, while the averaged Rossby number (Ro) value was 0.08 (±0.04) and averaged kinetic energy (KE) was of 255.3 (±154.8) cm2 /s2 . NBC rings have larger dimensions, rotate faster, live less, and transfer more energy in boreal winter months. In contrast, those shed during boreal summer and early fall last longer, have smaller diameters and carry less energy. Besides, the analysis of ring merging pointed that the interaction between NBC rings generated a significantly increase in ring energy (52%), and velocity (22%). Finally, we observed the vertical anomalies temperature and salinity profiles, which indicated a thermocline deepening and sinking of coastal and tropical waters due to NBC rings downwelling. This study emphasizes the robustness and efficiency of AMEDA for studying rings in the ocean and further theorizes possible impacts of NBC ring on ocean physical and biogeochemical features in the Western Tropical North Atlantic. |
author2 |
Laboratory of Physical, Coastal and Estuarine Oceanography (LOFEC) Federal University of Pernambuco Recife Austral, Boréal et Carbone (ABC) 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) Center for Risk Analysis and Environmental Modeling - CEERMA. Federal University of Pernambuco, Recife, PE, Brazil. European Project: 817578,TRIATLAS(2019) |
format |
Article in Journal/Newspaper |
author |
Aroucha, L.C. Veleda, Dóris Lopes, F. S. Tyaquiçã, Pedro Lefèvre, Nathalie Araujo, Moacyr |
author_facet |
Aroucha, L.C. Veleda, Dóris Lopes, F. S. Tyaquiçã, Pedro Lefèvre, Nathalie Araujo, Moacyr |
author_sort |
Aroucha, L.C. |
title |
Intra‐ and inter‐annual variability of North Brazil current rings using angular momentum Eddy detection and tracking algorithm: observations from 1993 to 2016 |
title_short |
Intra‐ and inter‐annual variability of North Brazil current rings using angular momentum Eddy detection and tracking algorithm: observations from 1993 to 2016 |
title_full |
Intra‐ and inter‐annual variability of North Brazil current rings using angular momentum Eddy detection and tracking algorithm: observations from 1993 to 2016 |
title_fullStr |
Intra‐ and inter‐annual variability of North Brazil current rings using angular momentum Eddy detection and tracking algorithm: observations from 1993 to 2016 |
title_full_unstemmed |
Intra‐ and inter‐annual variability of North Brazil current rings using angular momentum Eddy detection and tracking algorithm: observations from 1993 to 2016 |
title_sort |
intra‐ and inter‐annual variability of north brazil current rings using angular momentum eddy detection and tracking algorithm: observations from 1993 to 2016 |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-03145630 https://hal.science/hal-03145630/document https://hal.science/hal-03145630/file/JGR%20Oceans%20-%202020%20-%20Aroucha%20-%20Intra%25E2%2580%2590%20and%20Inter%25E2%2580%2590Annual%20Variability%20of%20North%20Brazil%20Current%20Rings%20Using%20Angular%20Momentum%20Eddy.pdf https://doi.org/10.1029/2019JC015921 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-03145630 Journal of Geophysical Research. Oceans, 2020, 125 (12), pp.e2019JC015921. ⟨10.1029/2019JC015921⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2019JC015921 info:eu-repo/grantAgreement//817578/EU/South and Tropical Atlantic climate-based marine ecosystem prediction for sustainable management /TRIATLAS hal-03145630 https://hal.science/hal-03145630 https://hal.science/hal-03145630/document https://hal.science/hal-03145630/file/JGR%20Oceans%20-%202020%20-%20Aroucha%20-%20Intra%25E2%2580%2590%20and%20Inter%25E2%2580%2590Annual%20Variability%20of%20North%20Brazil%20Current%20Rings%20Using%20Angular%20Momentum%20Eddy.pdf doi:10.1029/2019JC015921 IRD: fdi:010080564 WOS: 000603643300026 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2019JC015921 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
125 |
container_issue |
12 |
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1799485298699141120 |
spelling |
ftepunivpsaclay:oai:HAL:hal-03145630v1 2024-05-19T07:45:18+00:00 Intra‐ and inter‐annual variability of North Brazil current rings using angular momentum Eddy detection and tracking algorithm: observations from 1993 to 2016 Aroucha, L.C. Veleda, Dóris Lopes, F. S. Tyaquiçã, Pedro Lefèvre, Nathalie Araujo, Moacyr Laboratory of Physical, Coastal and Estuarine Oceanography (LOFEC) Federal University of Pernambuco Recife Austral, Boréal et Carbone (ABC) 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) Center for Risk Analysis and Environmental Modeling - CEERMA. Federal University of Pernambuco, Recife, PE, Brazil. European Project: 817578,TRIATLAS(2019) 2020-12 https://hal.science/hal-03145630 https://hal.science/hal-03145630/document https://hal.science/hal-03145630/file/JGR%20Oceans%20-%202020%20-%20Aroucha%20-%20Intra%25E2%2580%2590%20and%20Inter%25E2%2580%2590Annual%20Variability%20of%20North%20Brazil%20Current%20Rings%20Using%20Angular%20Momentum%20Eddy.pdf https://doi.org/10.1029/2019JC015921 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1029/2019JC015921 info:eu-repo/grantAgreement//817578/EU/South and Tropical Atlantic climate-based marine ecosystem prediction for sustainable management /TRIATLAS hal-03145630 https://hal.science/hal-03145630 https://hal.science/hal-03145630/document https://hal.science/hal-03145630/file/JGR%20Oceans%20-%202020%20-%20Aroucha%20-%20Intra%25E2%2580%2590%20and%20Inter%25E2%2580%2590Annual%20Variability%20of%20North%20Brazil%20Current%20Rings%20Using%20Angular%20Momentum%20Eddy.pdf doi:10.1029/2019JC015921 IRD: fdi:010080564 WOS: 000603643300026 info:eu-repo/semantics/OpenAccess ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-03145630 Journal of Geophysical Research. Oceans, 2020, 125 (12), pp.e2019JC015921. ⟨10.1029/2019JC015921⟩ [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2020 ftepunivpsaclay https://doi.org/10.1029/2019JC015921 2024-04-25T00:38:44Z International audience In order to investigate intra- and inter-annual variability of North Brazil Current (NBC) rings, angular momentum eddy detection and tracking algorithm (AMEDA) was used for identification of their occurrence, trajectories, and parameters. Based on 24 years (1993–2016) of geopotential height and geostrophic current fields reanalysis data from ARMOR 3D (¼°), we identified an average rate of five NBC rings shed by year. The rings present an average lifetime of 15.3 (±5.4) weeks, average speed based radius ($R_{max}$) of 139.8 (±23.6) km, and mean sea surface height anomaly (SSHa) of 9.4 (±4.0) cm. The mean observed maximum azimuthal velocity ($V_{max}$) was 0.27 (±0.08) m/s, while the averaged Rossby number (Ro) value was 0.08 (±0.04) and averaged kinetic energy (KE) was of 255.3 (±154.8) cm2 /s2 . NBC rings have larger dimensions, rotate faster, live less, and transfer more energy in boreal winter months. In contrast, those shed during boreal summer and early fall last longer, have smaller diameters and carry less energy. Besides, the analysis of ring merging pointed that the interaction between NBC rings generated a significantly increase in ring energy (52%), and velocity (22%). Finally, we observed the vertical anomalies temperature and salinity profiles, which indicated a thermocline deepening and sinking of coastal and tropical waters due to NBC rings downwelling. This study emphasizes the robustness and efficiency of AMEDA for studying rings in the ocean and further theorizes possible impacts of NBC ring on ocean physical and biogeochemical features in the Western Tropical North Atlantic. Article in Journal/Newspaper North Atlantic École Polytechnique, Université Paris-Saclay: HAL Journal of Geophysical Research: Oceans 125 12 |