Understanding upper water mass dynamics in the Gulf of Mexico by linking physical and biogeochemical features
International audience In the Gulf of Mexico (GoM), the upper 300 m of the water column contains a mixture of water types derived from water masses from the North Atlantic and the Caribbean Sea, namely Caribbean Surface Water (CSW), Subtropical Underwater (SUW), Gulf Common Water (GCW), and Tropical...
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Language: | English |
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Online Access: | https://insu.hal.science/insu-03671383 https://doi.org/10.1016/j.jmarsys.2021.103647 |
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ftinsu:oai:HAL:insu-03671383v1 2023-12-17T10:46:53+01:00 Understanding upper water mass dynamics in the Gulf of Mexico by linking physical and biogeochemical features Cervantes-Díaz, Gabriela Yareli Hernández-Ayón, José Martín Zirino, Alberto Herzka, Sharon Zinah Camacho-Ibar, Víctor Norzagaray, Orión Barbero, Leticia Montes, Ivonne Sudre, Joël Delgado, Juan Antonio Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) 2022 https://insu.hal.science/insu-03671383 https://doi.org/10.1016/j.jmarsys.2021.103647 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmarsys.2021.103647 insu-03671383 https://insu.hal.science/insu-03671383 BIBCODE: 2022JMS.22503647C doi:10.1016/j.jmarsys.2021.103647 ISSN: 0924-7963 Journal of Marine Systems https://insu.hal.science/insu-03671383 Journal of Marine Systems, 2022, 225, ⟨10.1016/j.jmarsys.2021.103647⟩ Water mass Apparent oxygen utilization Biogeochemistry Isopycnal Anticyclonic eddy Gulf of Mexico [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2022 ftinsu https://doi.org/10.1016/j.jmarsys.2021.103647 2023-11-22T17:31:30Z International audience In the Gulf of Mexico (GoM), the upper 300 m of the water column contains a mixture of water types derived from water masses from the North Atlantic and the Caribbean Sea, namely Caribbean Surface Water (CSW), Subtropical Underwater (SUW), Gulf Common Water (GCW), and Tropical Atlantic Central Water (TACW). These are mainly altered by mesoscale processes and local evaporation, which modulate biogeochemical cycles. In this study, we improve our understanding of water mass dynamics by including biogeochemical data when evaluating the T-S relationship to define water-mass boundaries, particularly when the observed thermohaline characteristics overlap. The variables considered were apparent oxygen utilization (AOU), nitrate, and dissolved inorganic carbon (DIC). The data were obtained from eight cruises carried out in the central and southern regions of the GoM and an additional cruise that covered the entire coastal-ocean region. The new proposed boundaries were instrumental in clarifying the dynamics of surface waters. Of note, GCW on the western side of the GoM is not formed from the mixing of CSW and SUW but by the mixing of remnant CSW with TACW. In winter, a remnant of CSW mixed with GCW, and the biogeochemical composition of surface waters was affected, as observed from an increase in nitrate and DIC concentrations and positive AOU values. CSW was mainly detected at the surface during summer with negative AOU values, low DIC values, and almost undetectable nitrate concentrations. The presence or absence of CSW modulated the depth of the nitracline and likely influenced primary productivity. Article in Journal/Newspaper North Atlantic Institut national des sciences de l'Univers: HAL-INSU Journal of Marine Systems 225 103647 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
Water mass Apparent oxygen utilization Biogeochemistry Isopycnal Anticyclonic eddy Gulf of Mexico [SDU]Sciences of the Universe [physics] |
spellingShingle |
Water mass Apparent oxygen utilization Biogeochemistry Isopycnal Anticyclonic eddy Gulf of Mexico [SDU]Sciences of the Universe [physics] Cervantes-Díaz, Gabriela Yareli Hernández-Ayón, José Martín Zirino, Alberto Herzka, Sharon Zinah Camacho-Ibar, Víctor Norzagaray, Orión Barbero, Leticia Montes, Ivonne Sudre, Joël Delgado, Juan Antonio Understanding upper water mass dynamics in the Gulf of Mexico by linking physical and biogeochemical features |
topic_facet |
Water mass Apparent oxygen utilization Biogeochemistry Isopycnal Anticyclonic eddy Gulf of Mexico [SDU]Sciences of the Universe [physics] |
description |
International audience In the Gulf of Mexico (GoM), the upper 300 m of the water column contains a mixture of water types derived from water masses from the North Atlantic and the Caribbean Sea, namely Caribbean Surface Water (CSW), Subtropical Underwater (SUW), Gulf Common Water (GCW), and Tropical Atlantic Central Water (TACW). These are mainly altered by mesoscale processes and local evaporation, which modulate biogeochemical cycles. In this study, we improve our understanding of water mass dynamics by including biogeochemical data when evaluating the T-S relationship to define water-mass boundaries, particularly when the observed thermohaline characteristics overlap. The variables considered were apparent oxygen utilization (AOU), nitrate, and dissolved inorganic carbon (DIC). The data were obtained from eight cruises carried out in the central and southern regions of the GoM and an additional cruise that covered the entire coastal-ocean region. The new proposed boundaries were instrumental in clarifying the dynamics of surface waters. Of note, GCW on the western side of the GoM is not formed from the mixing of CSW and SUW but by the mixing of remnant CSW with TACW. In winter, a remnant of CSW mixed with GCW, and the biogeochemical composition of surface waters was affected, as observed from an increase in nitrate and DIC concentrations and positive AOU values. CSW was mainly detected at the surface during summer with negative AOU values, low DIC values, and almost undetectable nitrate concentrations. The presence or absence of CSW modulated the depth of the nitracline and likely influenced primary productivity. |
author2 |
Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Cervantes-Díaz, Gabriela Yareli Hernández-Ayón, José Martín Zirino, Alberto Herzka, Sharon Zinah Camacho-Ibar, Víctor Norzagaray, Orión Barbero, Leticia Montes, Ivonne Sudre, Joël Delgado, Juan Antonio |
author_facet |
Cervantes-Díaz, Gabriela Yareli Hernández-Ayón, José Martín Zirino, Alberto Herzka, Sharon Zinah Camacho-Ibar, Víctor Norzagaray, Orión Barbero, Leticia Montes, Ivonne Sudre, Joël Delgado, Juan Antonio |
author_sort |
Cervantes-Díaz, Gabriela Yareli |
title |
Understanding upper water mass dynamics in the Gulf of Mexico by linking physical and biogeochemical features |
title_short |
Understanding upper water mass dynamics in the Gulf of Mexico by linking physical and biogeochemical features |
title_full |
Understanding upper water mass dynamics in the Gulf of Mexico by linking physical and biogeochemical features |
title_fullStr |
Understanding upper water mass dynamics in the Gulf of Mexico by linking physical and biogeochemical features |
title_full_unstemmed |
Understanding upper water mass dynamics in the Gulf of Mexico by linking physical and biogeochemical features |
title_sort |
understanding upper water mass dynamics in the gulf of mexico by linking physical and biogeochemical features |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://insu.hal.science/insu-03671383 https://doi.org/10.1016/j.jmarsys.2021.103647 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0924-7963 Journal of Marine Systems https://insu.hal.science/insu-03671383 Journal of Marine Systems, 2022, 225, ⟨10.1016/j.jmarsys.2021.103647⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmarsys.2021.103647 insu-03671383 https://insu.hal.science/insu-03671383 BIBCODE: 2022JMS.22503647C doi:10.1016/j.jmarsys.2021.103647 |
op_doi |
https://doi.org/10.1016/j.jmarsys.2021.103647 |
container_title |
Journal of Marine Systems |
container_volume |
225 |
container_start_page |
103647 |
_version_ |
1785570554919518208 |