Age models of sediment cores from the North-West African continental margin ...

• Main Authors: Lutze, Gerhard F, Pflaumann, Uwe, Weinholz, Peter
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1986
• Subjects: Sphincter corer; Kasten corer; Gravity corer Kiel type; M25; M51; M53; Meteor 1964; Institute for Geosciences, Christian Albrechts University, Kiel GIK/IfG; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.548493; https://doi.pangaea.de/10.1594/PANGAEA.548493

A statistical analysis ol 15 deep sea cores in the eastern North Atlantic off NW Africa revealed the typical fluctuation pattern of distinct species proups as has been described from various parts of the world ocean.Only the "WBF-group" appears to be correlated with global climatic changes, i.e. warmer periods as the Eemian and the Atlanticum. A partly antagonistic "High Productivity group" (HPR-group) is in general not linked with global changes but times of increased fertility in the surface water and the resulting flux of organic matter reaching the bottom. The groups were extracted from cluster analysis of more than 150 surface samples (HPR-group) and a factor analysis of selected cores (WBF-group).In contrast to previous studies the observed fluctuations can not be explained by drastic changes in bottom water masses, but by the pulsation of a distinct "High Productivity Patch" in space and time. At present, this patch is located below the well known upwelling area between 22° and 12° northern latitude. ... : Supplement to: Lutze, Gerhard F; Pflaumann, Uwe; Weinholz, Peter (1986): Jungquartäre Fluktuationen der benthischen Foraminiferenfaunen in Tiefsee-Sedimenten vor NW-Afrika - Eine Reaktion auf Produktivitätsänderungen im Oberflächenwasser. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C40, 163-180 ...