Coccolith fluxes in the Santa Barbara Basin
We investigate the long-term stability of El Niño-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 assem...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.832069 2023-05-15T16:00:03+02:00 Coccolith fluxes in the Santa Barbara Basin Grelaud, Michaël Beaufort, Luc Cuven, Stéphanie Buchet, Noëlle LATITUDE: 34.286200 * LONGITUDE: -120.036500 * DATE/TIME START: 2002-06-06T04:51:00 * DATE/TIME END: 2002-06-06T04:51:00 2009-04-23 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.832069 https://doi.org/10.1594/PANGAEA.832069 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.832069 https://doi.org/10.1594/PANGAEA.832069 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Grelaud, Michaël; Beaufort, Luc; Cuven, Stéphanie; Buchet, Noëlle (2009): Glacial to interglacial primary production and El Niño-Southern Oscillation dynamics inferred from coccolithophores of the Santa Barbara Basin. Paleoceanography, 24(1), PA1203, https://doi.org/10.1029/2007PA001578 Dataset 2009 ftpangaea https://doi.org/10.1594/PANGAEA.832069 https://doi.org/10.1029/2007PA001578 2023-01-20T07:33:16Z We investigate the long-term stability of El Niño-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, Bølling-Allerød, and Dansgaard-Oeschger event 3 indicates El Niño probably existed continuously during the last 28 ka. The frequency of El Niño varied through time (between 1/2.5 and 1/5 event/a) and appearing to follow the precession cycle. El Niño exhibits higher (lower) frequencies when the precession values are lower (higher). Finally, the Holocene is characterized by a decrease in El Niño's frequencies due to the reinforcement of El Niño through this period. Dataset Dansgaard-Oeschger events PANGAEA - Data Publisher for Earth & Environmental Science Pacific ENVELOPE(-120.036500,-120.036500,34.286200,34.286200) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
description |
We investigate the long-term stability of El Niño-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, Bølling-Allerød, and Dansgaard-Oeschger event 3 indicates El Niño probably existed continuously during the last 28 ka. The frequency of El Niño varied through time (between 1/2.5 and 1/5 event/a) and appearing to follow the precession cycle. El Niño exhibits higher (lower) frequencies when the precession values are lower (higher). Finally, the Holocene is characterized by a decrease in El Niño's frequencies due to the reinforcement of El Niño through this period. |
format |
Dataset |
author |
Grelaud, Michaël Beaufort, Luc Cuven, Stéphanie Buchet, Noëlle |
spellingShingle |
Grelaud, Michaël Beaufort, Luc Cuven, Stéphanie Buchet, Noëlle Coccolith fluxes in the Santa Barbara Basin |
author_facet |
Grelaud, Michaël Beaufort, Luc Cuven, Stéphanie Buchet, Noëlle |
author_sort |
Grelaud, Michaël |
title |
Coccolith fluxes in the Santa Barbara Basin |
title_short |
Coccolith fluxes in the Santa Barbara Basin |
title_full |
Coccolith fluxes in the Santa Barbara Basin |
title_fullStr |
Coccolith fluxes in the Santa Barbara Basin |
title_full_unstemmed |
Coccolith fluxes in the Santa Barbara Basin |
title_sort |
coccolith fluxes in the santa barbara basin |
publisher |
PANGAEA |
publishDate |
2009 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.832069 https://doi.org/10.1594/PANGAEA.832069 |
op_coverage |
LATITUDE: 34.286200 * LONGITUDE: -120.036500 * DATE/TIME START: 2002-06-06T04:51:00 * DATE/TIME END: 2002-06-06T04:51:00 |
long_lat |
ENVELOPE(-120.036500,-120.036500,34.286200,34.286200) |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Dansgaard-Oeschger events |
genre_facet |
Dansgaard-Oeschger events |
op_source |
Supplement to: Grelaud, Michaël; Beaufort, Luc; Cuven, Stéphanie; Buchet, Noëlle (2009): Glacial to interglacial primary production and El Niño-Southern Oscillation dynamics inferred from coccolithophores of the Santa Barbara Basin. Paleoceanography, 24(1), PA1203, https://doi.org/10.1029/2007PA001578 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.832069 https://doi.org/10.1594/PANGAEA.832069 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.832069 https://doi.org/10.1029/2007PA001578 |
_version_ |
1766395933773266944 |