Coccolithophore productivity in the North Atlantic during the Middle Pleistocene based on coccolith fraction Sr/Ca ratios from IODP Hole 306-U1313D ...

• Main Authors: Cavaleiro, Catarina, Voelker, Antje H L, Stoll, Heather M, Baumann, Karl-Heinz, Kulhanek, Denise K, Naafs, Bernhard David A, Stein, Ruediger, Gruetzner, Jens, Ventura, C, Kucera, Michal
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2018
• Subjects: Integrated Ocean Drilling Program / International Ocean Discovery Program IODP; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.890342; https://doi.pangaea.de/10.1594/PANGAEA.890342

Coccolithophores play a key role in the oceanic carbon cycle through the biological and carbonate pumps. Understanding controls on coccolithophore productivity is thus fundamental to quantify oceanic carbon cycling. We investigate changes in coccolithophore productivity over several Pleistocene glacial-interglacial cycles using a high-resolution coccolith Sr/Ca ratio record, which is an indicator of growth rate and thus a proxy for coccolithophore productivity. We use Middle Pleistocene sediments from the North Atlantic Integrated Ocean Drilling Program (IODP) Site U1313 (41.00' N, 32.58' W) spanning Marine Isotopic Stages 16 to 10 (638 to 356 kyr). The location of the record allows us to investigate processes affecting productivity in a mid-latitude setting and to unravel the effects of temperature and regional ocean circulation. Coccolithophore productivity shows a dominant glacial-interglacial cyclicity with higher productivity during glacials, which appears to reflect the southward migration of the North ... : Supplement to: Cavaleiro, Catarina; Voelker, Antje H L; Stoll, Heather M; Baumann, Karl-Heinz; Kulhanek, Denise K; Naafs, Bernhard David A; Stein, Ruediger; Gruetzner, Jens; Ventura, C; Kucera, Michal (2018): Insolation forcing of coccolithophore productivity in the North Atlantic during the Middle Pleistocene. Quaternary Science Reviews, 191, 318-336 ...