On the potential causes of the recent Pelagic Sargassum blooms events in the tropical North Atlantic Ocean
International audience Since 2011, unprecedented and repetitive blooms and large mass strandings of the floating brown macroalgae, Sargassum natans and Sargassum fluitans have been reported along the West Indies, the Caribbean, the Brazilian and the West Africa coasts. Recent studies have highlighte...
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2017
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Online Access: | https://hal.science/hal-02181113 https://hal.science/hal-02181113/document https://hal.science/hal-02181113/file/bg-2017-346.pdf https://doi.org/10.5194/bg-2017-346 |
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ftutoulouse3hal:oai:HAL:hal-02181113v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université Toulouse III - Paul Sabatier: HAL-UPS |
op_collection_id |
ftutoulouse3hal |
language |
English |
topic |
Pelagic Sargassum North Equatorial Recirculation Region Sea Surface Temperature Amazon River nutrients [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
spellingShingle |
Pelagic Sargassum North Equatorial Recirculation Region Sea Surface Temperature Amazon River nutrients [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] Djakouré, Sandrine Araujo, Moacyr Hounsou-Gbo, Aubains Noriega, Carlos Bourlès, Bernard On the potential causes of the recent Pelagic Sargassum blooms events in the tropical North Atlantic Ocean |
topic_facet |
Pelagic Sargassum North Equatorial Recirculation Region Sea Surface Temperature Amazon River nutrients [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
description |
International audience Since 2011, unprecedented and repetitive blooms and large mass strandings of the floating brown macroalgae, Sargassum natans and Sargassum fluitans have been reported along the West Indies, the Caribbean, the Brazilian and the West Africa coasts. Recent studies have highlighted a new tank of Sargassum: the North Equatorial Recirculation Region of the Atlantic Ocean. This region is located off the northeast of Brazil, approximately between the equator and 10 • N and from 50 • W to 25 • W. The potential causes of these recent blooms and mass strandings are still poorly understood. Observational datasets and modelling outputs involving hydrological parameters and climate events are examined focusing on their potential feedback on the observed blooms and mass strandings. The results show that combined conditions have been in favor of these recent changes. High anomalously unprecedented positive sea surface temperature observed in the tropical Atlantic in 2010-2011 could have induced favorable temperature conditions for Sargassum blooms. These favorable conditions were then fed by additional continental nutrients inputs, principally from the Amazon River. These continental nutrients load are the consequences of deforestation, agroindustrial and urban activities in the Amazonian forest. The results also suggest that subsurface intake of nutrients from the equatorial upwelling could also contribute to the blooms of the Sargassum seaweed in the Atlantic Ocean but further studies are needed to confirm these additional inputs. |
author2 |
International Chair of Mathematical Physics and Applications (ICMPA-UNESCO) Université d’Abomey-Calavi = University of Abomey Calavi (UAC) Universidade Federal de Pernambuco Recife (UFPE) Océan du Large et Variabilité Climatique (OLVAC) 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)-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)-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 |
Djakouré, Sandrine Araujo, Moacyr Hounsou-Gbo, Aubains Noriega, Carlos Bourlès, Bernard |
author_facet |
Djakouré, Sandrine Araujo, Moacyr Hounsou-Gbo, Aubains Noriega, Carlos Bourlès, Bernard |
author_sort |
Djakouré, Sandrine |
title |
On the potential causes of the recent Pelagic Sargassum blooms events in the tropical North Atlantic Ocean |
title_short |
On the potential causes of the recent Pelagic Sargassum blooms events in the tropical North Atlantic Ocean |
title_full |
On the potential causes of the recent Pelagic Sargassum blooms events in the tropical North Atlantic Ocean |
title_fullStr |
On the potential causes of the recent Pelagic Sargassum blooms events in the tropical North Atlantic Ocean |
title_full_unstemmed |
On the potential causes of the recent Pelagic Sargassum blooms events in the tropical North Atlantic Ocean |
title_sort |
on the potential causes of the recent pelagic sargassum blooms events in the tropical north atlantic ocean |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal.science/hal-02181113 https://hal.science/hal-02181113/document https://hal.science/hal-02181113/file/bg-2017-346.pdf https://doi.org/10.5194/bg-2017-346 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 1810-6277 EISSN: 1810-6285 Biogeosciences Discussions https://hal.science/hal-02181113 Biogeosciences Discussions, 2017, pp.1-20. ⟨10.5194/bg-2017-346⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-2017-346 hal-02181113 https://hal.science/hal-02181113 https://hal.science/hal-02181113/document https://hal.science/hal-02181113/file/bg-2017-346.pdf doi:10.5194/bg-2017-346 |
op_rights |
http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/bg-2017-346 |
_version_ |
1785570441086107648 |
spelling |
ftutoulouse3hal:oai:HAL:hal-02181113v1 2023-12-17T10:46:48+01:00 On the potential causes of the recent Pelagic Sargassum blooms events in the tropical North Atlantic Ocean Djakouré, Sandrine Araujo, Moacyr Hounsou-Gbo, Aubains Noriega, Carlos Bourlès, Bernard International Chair of Mathematical Physics and Applications (ICMPA-UNESCO) Université d’Abomey-Calavi = University of Abomey Calavi (UAC) Universidade Federal de Pernambuco Recife (UFPE) Océan du Large et Variabilité Climatique (OLVAC) 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)-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)-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) 2017-07-20 https://hal.science/hal-02181113 https://hal.science/hal-02181113/document https://hal.science/hal-02181113/file/bg-2017-346.pdf https://doi.org/10.5194/bg-2017-346 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-2017-346 hal-02181113 https://hal.science/hal-02181113 https://hal.science/hal-02181113/document https://hal.science/hal-02181113/file/bg-2017-346.pdf doi:10.5194/bg-2017-346 http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess ISSN: 1810-6277 EISSN: 1810-6285 Biogeosciences Discussions https://hal.science/hal-02181113 Biogeosciences Discussions, 2017, pp.1-20. ⟨10.5194/bg-2017-346⟩ Pelagic Sargassum North Equatorial Recirculation Region Sea Surface Temperature Amazon River nutrients [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] info:eu-repo/semantics/article Journal articles 2017 ftutoulouse3hal https://doi.org/10.5194/bg-2017-346 2023-11-22T18:03:18Z International audience Since 2011, unprecedented and repetitive blooms and large mass strandings of the floating brown macroalgae, Sargassum natans and Sargassum fluitans have been reported along the West Indies, the Caribbean, the Brazilian and the West Africa coasts. Recent studies have highlighted a new tank of Sargassum: the North Equatorial Recirculation Region of the Atlantic Ocean. This region is located off the northeast of Brazil, approximately between the equator and 10 • N and from 50 • W to 25 • W. The potential causes of these recent blooms and mass strandings are still poorly understood. Observational datasets and modelling outputs involving hydrological parameters and climate events are examined focusing on their potential feedback on the observed blooms and mass strandings. The results show that combined conditions have been in favor of these recent changes. High anomalously unprecedented positive sea surface temperature observed in the tropical Atlantic in 2010-2011 could have induced favorable temperature conditions for Sargassum blooms. These favorable conditions were then fed by additional continental nutrients inputs, principally from the Amazon River. These continental nutrients load are the consequences of deforestation, agroindustrial and urban activities in the Amazonian forest. The results also suggest that subsurface intake of nutrients from the equatorial upwelling could also contribute to the blooms of the Sargassum seaweed in the Atlantic Ocean but further studies are needed to confirm these additional inputs. Article in Journal/Newspaper North Atlantic Université Toulouse III - Paul Sabatier: HAL-UPS |