Glacial to interglacial primary production and El Nino-Southern Oscillation dynamics inferred from coccolithophores of the Santa Barbara Basin
International audience We investigate the long-term stability of El Nino-Southern Oscillation and Pacific Decadal Oscillation based on the examination of coccolithophore assemblages in a largely laminated 35 ka sedimentary record, retrieved in the Santa Barbara Basin (core MD02-2503). At a centennia...
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Online Access: | https://hal.science/hal-01458318 https://hal.science/hal-01458318/document https://hal.science/hal-01458318/file/2007PA001578.pdf https://doi.org/10.1029/2007PA001578 |
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ftcollegfrance:oai:HAL:hal-01458318v1 2024-06-23T07:52:20+00:00 Glacial to interglacial primary production and El Nino-Southern Oscillation dynamics inferred from coccolithophores of the Santa Barbara Basin Grelaud, Michael Beaufort, Luc, L Cuven, Stéphanie Buchet, Noëlle Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 2009 https://hal.science/hal-01458318 https://hal.science/hal-01458318/document https://hal.science/hal-01458318/file/2007PA001578.pdf https://doi.org/10.1029/2007PA001578 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2007PA001578 hal-01458318 https://hal.science/hal-01458318 https://hal.science/hal-01458318/document https://hal.science/hal-01458318/file/2007PA001578.pdf doi:10.1029/2007PA001578 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess ISSN: 0883-8305 Paleoceanography https://hal.science/hal-01458318 Paleoceanography, 2009, 24 (1), pp.PA1203. ⟨10.1029/2007PA001578⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2009 ftcollegfrance https://doi.org/10.1029/2007PA001578 2024-06-13T23:37:29Z International audience We investigate the long-term stability of El Nino-Southern Oscillation and Pacific Decadal Oscillation based on the examination of coccolithophore assemblages in a largely laminated 35 ka sedimentary record, retrieved in the Santa Barbara Basin (core MD02-2503). At a centennial scale coccolith assemblages indicate low primary production in the basin from 35 to 11.5 ka B. P., whereas the Holocene is characterized by high-productivity conditions. This pattern demonstrates the influence of the glacial-interglacial cycles on productivity and, by inference, on the nutrient supply by the upwelling cell off Point of Conception. On a shorter scale, laminations associated with Dansgaard-Oeschger events appear to be due to an injection of poorly oxygenated waters in the deepest part of the basin rather than anoxia due to high primary production. A seasonal sampling in seven laminated sections (spanning from 20 to 220 years) extracted from Holocene, Bolling-Allerod, and Dansgaard-Oeschger event 3 indicates El Nino probably existed continuously during the last 28 ka. The frequency of El Nino varied through time (between 1/2.5 and 1/5 event a(-1)) and appearing to follow the precession cycle. El Nino exhibits higher (lower) frequencies when the precession values are lower (higher). Finally, the Holocene is characterized by a decrease in El Nino's frequencies due to the reinforcement of El Nino through this period. Article in Journal/Newspaper Dansgaard-Oeschger events Collège de France: HAL Pacific Paleoceanography 24 1 n/a n/a |
institution |
Open Polar |
collection |
Collège de France: HAL |
op_collection_id |
ftcollegfrance |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Grelaud, Michael Beaufort, Luc, L Cuven, Stéphanie Buchet, Noëlle Glacial to interglacial primary production and El Nino-Southern Oscillation dynamics inferred from coccolithophores of the Santa Barbara Basin |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience We investigate the long-term stability of El Nino-Southern Oscillation and Pacific Decadal Oscillation based on the examination of coccolithophore assemblages in a largely laminated 35 ka sedimentary record, retrieved in the Santa Barbara Basin (core MD02-2503). At a centennial scale coccolith assemblages indicate low primary production in the basin from 35 to 11.5 ka B. P., whereas the Holocene is characterized by high-productivity conditions. This pattern demonstrates the influence of the glacial-interglacial cycles on productivity and, by inference, on the nutrient supply by the upwelling cell off Point of Conception. On a shorter scale, laminations associated with Dansgaard-Oeschger events appear to be due to an injection of poorly oxygenated waters in the deepest part of the basin rather than anoxia due to high primary production. A seasonal sampling in seven laminated sections (spanning from 20 to 220 years) extracted from Holocene, Bolling-Allerod, and Dansgaard-Oeschger event 3 indicates El Nino probably existed continuously during the last 28 ka. The frequency of El Nino varied through time (between 1/2.5 and 1/5 event a(-1)) and appearing to follow the precession cycle. El Nino exhibits higher (lower) frequencies when the precession values are lower (higher). Finally, the Holocene is characterized by a decrease in El Nino's frequencies due to the reinforcement of El Nino through this period. |
author2 |
Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Grelaud, Michael Beaufort, Luc, L Cuven, Stéphanie Buchet, Noëlle |
author_facet |
Grelaud, Michael Beaufort, Luc, L Cuven, Stéphanie Buchet, Noëlle |
author_sort |
Grelaud, Michael |
title |
Glacial to interglacial primary production and El Nino-Southern Oscillation dynamics inferred from coccolithophores of the Santa Barbara Basin |
title_short |
Glacial to interglacial primary production and El Nino-Southern Oscillation dynamics inferred from coccolithophores of the Santa Barbara Basin |
title_full |
Glacial to interglacial primary production and El Nino-Southern Oscillation dynamics inferred from coccolithophores of the Santa Barbara Basin |
title_fullStr |
Glacial to interglacial primary production and El Nino-Southern Oscillation dynamics inferred from coccolithophores of the Santa Barbara Basin |
title_full_unstemmed |
Glacial to interglacial primary production and El Nino-Southern Oscillation dynamics inferred from coccolithophores of the Santa Barbara Basin |
title_sort |
glacial to interglacial primary production and el nino-southern oscillation dynamics inferred from coccolithophores of the santa barbara basin |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://hal.science/hal-01458318 https://hal.science/hal-01458318/document https://hal.science/hal-01458318/file/2007PA001578.pdf https://doi.org/10.1029/2007PA001578 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Dansgaard-Oeschger events |
genre_facet |
Dansgaard-Oeschger events |
op_source |
ISSN: 0883-8305 Paleoceanography https://hal.science/hal-01458318 Paleoceanography, 2009, 24 (1), pp.PA1203. ⟨10.1029/2007PA001578⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2007PA001578 hal-01458318 https://hal.science/hal-01458318 https://hal.science/hal-01458318/document https://hal.science/hal-01458318/file/2007PA001578.pdf doi:10.1029/2007PA001578 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2007PA001578 |
container_title |
Paleoceanography |
container_volume |
24 |
container_issue |
1 |
container_start_page |
n/a |
op_container_end_page |
n/a |
_version_ |
1802643615592218624 |