Millennial scale coccolithophore paleoproductivity and surface water changes between 445 and 360ka (Marine Isotope Stages 12/11) in the Northeast Atlantic | - CCMAR -

Journal Article

TitleMillennial scale coccolithophore paleoproductivity and surface water changes between 445 and 360ka (Marine Isotope Stages 12/11) in the Northeast Atlantic
Publication TypeJournal Article
AuthorsPalumbo, E, Flores, JA, Perugia, C, Petrillo, Z, Voelker, AHL, Amore, FO
Year of Publication2013
JournalPalaeogeography, Palaeoclimatology, Palaeoecology
Volume383-384
Date Published08/2013
Pagination27 - 41
ISSN00310182
Abstract

A high resolution coccolithophores study was carried out in order to improve the understanding of the paleoceanographic evolution and changes in paleoproductivity occurring off the Iberian Margin (IM) between 445 and 360 ka, i.e. during late Marine Isotope Stage 12 to 11. Coccolithophore assemblages allowed reconstructing surface water changes characterized by millennial-scale oscillations (~ 1.5 kyr cycles) involving Portugal or Iberian Poleward Currents (PC and IPC) prevalence. Changes in paleoproductivity, possibly related to the upwelling of Eastern North Atlantic Central Waters (ENACW) -of sub-tropical (ENACWst) or sub-polar origin (ENACWsp) - were also recognized. This study also permitted detecting abrupt events (stadial/interstadial-type oscillations) and revealed that changes in paleoproductivity are related to opposite dynamics during glacial and interglacial stages, with the reversed setting being established during the deglaciation. Furthermore, a possible control of half and fourth precessional cycle components, on the occurrence of abrupt changes within the assemblages’ structure, during the deglaciation, is proposed on the basis of wavelet analysis results applied to selected taxa.

URLhttp://linkinghub.elsevier.com/retrieve/pii/S0031018213002113http://api.elsevier.com/content/article/PII:S0031018213002113?httpAccept=text/xmlhttp://api.elsevier.com/content/article/PII:S0031018213002113?httpAccept=text/plain
DOI10.1016/j.palaeo.2013.04.024
Short TitlePalaeogeography, Palaeoclimatology, Palaeoecology