Atlantic Equatorial Undercurrent intensification counteracts warming-induced deoxygenation
International audience The tropical Atlantic upper-ocean circulation experiences multiannual to decadal changes associated with different climate modes and is simultaneously adjusting to climate warming. The most energetic current in the tropical Atlantic is the Equatorial Undercurrent (EUC), which...
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Online Access: | https://insu.hal.science/insu-03661719 https://doi.org/10.1038/s41561-021-00716-1 |
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ftccsdartic:oai:HAL:insu-03661719v1 2023-12-17T10:46:41+01:00 Atlantic Equatorial Undercurrent intensification counteracts warming-induced deoxygenation Brandt, Peter Hahn, Johannes Schmidtko, Sunke Tuchen, Franz Philip Kopte, Robert Kiko, Rainer Bourlès, Bernard Czeschel, Rena Dengler, Marcus Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Institut de Recherche pour le Développement (IRD) ANR-19-MPGA-0012,TAD,Tropical Atlantic Deoxygenation: gateway dynamics, feedback mechanisms and ecosystem impacts(2019) 2021 https://insu.hal.science/insu-03661719 https://doi.org/10.1038/s41561-021-00716-1 en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/s41561-021-00716-1 insu-03661719 https://insu.hal.science/insu-03661719 BIBCODE: 2021NatGe.14.278B doi:10.1038/s41561-021-00716-1 ISSN: 1752-0894 Nature Geoscience https://insu.hal.science/insu-03661719 Nature Geoscience, 2021, 14, pp.278-282. ⟨10.1038/s41561-021-00716-1⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2021 ftccsdartic https://doi.org/10.1038/s41561-021-00716-1 2023-11-19T00:12:01Z International audience The tropical Atlantic upper-ocean circulation experiences multiannual to decadal changes associated with different climate modes and is simultaneously adjusting to climate warming. The most energetic current in the tropical Atlantic is the Equatorial Undercurrent (EUC), which flows eastwards along the Equator. On the basis of long-term moored observations, we show that the EUC strengthened by more than 20% from 2008 to 2018. The intensification of the EUC is associated with increasing subsurface oxygen concentrations and a thickening of the upper-ocean oxygenated layer in the equatorial Atlantic. These changes counteract climate-warming-induced deoxygenation in the region. The EUC strengthening is found to be mainly forced by trade wind changes in the western tropical North Atlantic. A 60-yr dataset reveals that the recent oxygen increase in the upper equatorial Atlantic is associated with multidecadal variability. This variability is characterized by low oxygen concentrations in the 1990s and early 2000s, and high oxygen concentrations in the 1960s and 1970s. The observed oxygen variability seems to be linked to a compression and expansion of the habitat of tropical pelagic fish, and must be accounted for when evaluating the possible consequences of deoxygenation for marine ecosystems and fisheries. Article in Journal/Newspaper North Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Nature Geoscience 14 5 278 282 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
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[SDU]Sciences of the Universe [physics] |
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[SDU]Sciences of the Universe [physics] Brandt, Peter Hahn, Johannes Schmidtko, Sunke Tuchen, Franz Philip Kopte, Robert Kiko, Rainer Bourlès, Bernard Czeschel, Rena Dengler, Marcus Atlantic Equatorial Undercurrent intensification counteracts warming-induced deoxygenation |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience The tropical Atlantic upper-ocean circulation experiences multiannual to decadal changes associated with different climate modes and is simultaneously adjusting to climate warming. The most energetic current in the tropical Atlantic is the Equatorial Undercurrent (EUC), which flows eastwards along the Equator. On the basis of long-term moored observations, we show that the EUC strengthened by more than 20% from 2008 to 2018. The intensification of the EUC is associated with increasing subsurface oxygen concentrations and a thickening of the upper-ocean oxygenated layer in the equatorial Atlantic. These changes counteract climate-warming-induced deoxygenation in the region. The EUC strengthening is found to be mainly forced by trade wind changes in the western tropical North Atlantic. A 60-yr dataset reveals that the recent oxygen increase in the upper equatorial Atlantic is associated with multidecadal variability. This variability is characterized by low oxygen concentrations in the 1990s and early 2000s, and high oxygen concentrations in the 1960s and 1970s. The observed oxygen variability seems to be linked to a compression and expansion of the habitat of tropical pelagic fish, and must be accounted for when evaluating the possible consequences of deoxygenation for marine ecosystems and fisheries. |
author2 |
Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Institut de Recherche pour le Développement (IRD) ANR-19-MPGA-0012,TAD,Tropical Atlantic Deoxygenation: gateway dynamics, feedback mechanisms and ecosystem impacts(2019) |
format |
Article in Journal/Newspaper |
author |
Brandt, Peter Hahn, Johannes Schmidtko, Sunke Tuchen, Franz Philip Kopte, Robert Kiko, Rainer Bourlès, Bernard Czeschel, Rena Dengler, Marcus |
author_facet |
Brandt, Peter Hahn, Johannes Schmidtko, Sunke Tuchen, Franz Philip Kopte, Robert Kiko, Rainer Bourlès, Bernard Czeschel, Rena Dengler, Marcus |
author_sort |
Brandt, Peter |
title |
Atlantic Equatorial Undercurrent intensification counteracts warming-induced deoxygenation |
title_short |
Atlantic Equatorial Undercurrent intensification counteracts warming-induced deoxygenation |
title_full |
Atlantic Equatorial Undercurrent intensification counteracts warming-induced deoxygenation |
title_fullStr |
Atlantic Equatorial Undercurrent intensification counteracts warming-induced deoxygenation |
title_full_unstemmed |
Atlantic Equatorial Undercurrent intensification counteracts warming-induced deoxygenation |
title_sort |
atlantic equatorial undercurrent intensification counteracts warming-induced deoxygenation |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://insu.hal.science/insu-03661719 https://doi.org/10.1038/s41561-021-00716-1 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 1752-0894 Nature Geoscience https://insu.hal.science/insu-03661719 Nature Geoscience, 2021, 14, pp.278-282. ⟨10.1038/s41561-021-00716-1⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s41561-021-00716-1 insu-03661719 https://insu.hal.science/insu-03661719 BIBCODE: 2021NatGe.14.278B doi:10.1038/s41561-021-00716-1 |
op_doi |
https://doi.org/10.1038/s41561-021-00716-1 |
container_title |
Nature Geoscience |
container_volume |
14 |
container_issue |
5 |
container_start_page |
278 |
op_container_end_page |
282 |
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