(Appendix A) Abundance of selected coccolithophores in sediment core DS97-2P, North Atlantic ...

• Main Authors: Balestra, Barbara, Ziveri, Patrizia, Baumann, Karl-Heinz, Troelstra, Simon, Monechi, Simonetta
• Format: Dataset
• Language: English
• Published: PANGAEA 2010
• Subjects: AGE; Emiliania huxleyi; Coccolithus pelagicus; Gephyrocapsa muellerae; Coccolithophoridae, other; Coccolithophoridae; Piston corer; Microscopy; PL97; Professor Logachev; International Polar Year 2007-2008 IPY; Reykjanes; International Polar Year; IPY; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.807155; https://doi.pangaea.de/10.1594/PANGAEA.807155

The calcareous nannofossil assemblages from sediment core DS97-2P from the Reykjanes Ridge have been investigated to document oceanographic changes in surface water during the Holocene. The recorded variations in coccolithophore species assemblages and accumulation rates indicate that the region was subjected to rapid changes of surface water masses throughout the entire Holocene. Coccolithophore assemblages generally are of low species diversity and consist mainly of Emiliania huxleyi and Coccolithus pelagicus ssp. pelagicus. Two major events occurred at 8.5-7 ka and at 4.5-3.5 ka, showing higher coccolith accumulation rates, suggesting that the influence of relatively warm Atlantic waters via the Irminger Current was strong in the investigated area. The coccolithophore assemblages have been compared with diatom, foraminifer and sedimentological records within the same core. These data, supported by a comparison with previously published proxy records, add credit to the hypothesis that Holocene changes did ... : Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 ...