Nannoplankton abundances and accumulation rates of the last 24 ka BP of sediment core MD03-2699 ...

• Main Authors: Palumbo, Eliana, Flores, José-Abel, Perugia, Carmen, Emanuele, Dario, Petrillo, Zaccaria, Rodrigues, Teresa, Voelker, Antje H L, Amore, Filomena Ornella
• Format: Dataset
• Language: English
• Published: PANGAEA 2013
• Subjects: AGE; Emiliania huxleyi; Coccolithus pelagicus ssp. pelagicus; Gephyrocapsa muellerae; Nannofossils, cold water taxa; Nannofossils, warm water taxa; Umbilicosphaera sibogae; Florisphaera profunda; Nannofossils, reworked fossil; Preservation index; Preservation; Coccoliths; Accumulation rate, nannofossils; Accumulation rate, nannofossils, reworked; Calypso Corer; Counting, coccoliths; Calculated; MD134; Marion Dufresne 1995; Subarctic
• Online Access: https://dx.doi.org/10.1594/pangaea.836238; https://doi.pangaea.de/10.1594/PANGAEA.836238

A high-resolution coccolithophore study allowed reconstructing sea surface conditions during the last 24 ka BP off the Iberian Margin. Variations in nannoplankton accumulation rate, cold-water species, Florisphaera profunda, Umbilicosphaera sibogae and Coccolithus pelagicus ssp. azorinus trends suggest the occurrence of substantial changes in surface water dynamics. Palaeoproductivity shows changes during the glacial and the interglacial transition from intense glacial upwelling to persistent interglacial stratification. A drastic productivity decline occurred between ~18 and 13 ka BP related to the arrival of subpolar waters indicated by the presence of the subarctic subspecies C. pelagicus pelagicus and increased percentages of tetra-unsaturated alkenones. Abrupt variability at core MD03-2699 during the last 24 ka BP was observed in palaeoproductivity and sea surface temperatures proxies. Increases of reworked species fluxes were observed during the Last Glacial Maximum and during the transition to the ... : Supplement to: Palumbo, Eliana; Flores, José-Abel; Perugia, Carmen; Emanuele, Dario; Petrillo, Zaccaria; Rodrigues, Teresa; Voelker, Antje H L; Amore, Filomena Ornella (2013): Abrupt variability of the last 24 ka BP recorded by coccolithophore assemblages off the Iberian Margin (core MD03-2699). Journal of Quaternary Science, 28(3), 320-328 ...