Grelaud, Michaël; Beaufort, Luc; Cuven, Stéphanie; Buchet, Noëlle (2009): Coccolith fluxes in the Santa Barbara Basin [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.832069, Supplement to: Grelaud, M et al. (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
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Abstract:
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.
Coverage:
Latitude: 34.286200 * Longitude: -120.036500
Date/Time Start: 2002-06-06T04:51:00 * Date/Time End: 2002-06-06T04:51:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
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2 datasets
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Datasets listed in this publication series
- Grelaud, M; Beaufort, L; Cuven, S et al. (2009): (Table 1) Age determination of sediment core MD02-2503. https://doi.org/10.1594/PANGAEA.832068
- Grelaud, M; Beaufort, L; Cuven, S et al. (2009): (Table S1) Coccolith counts and fluxes of sediment core MD02-2503. https://doi.org/10.1594/PANGAEA.832067