Radiolarian fauna of sediment core MD96-2089 off Lüderitz, Namibia ...

• Main Authors: Jacot des Combes, Hélène, Abelmann, Andrea
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2007
• Subjects: Calypso Corer; MD105; Marion Dufresne 1995; International Marine Global Change Study IMAGES; Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Antarc*; Antarctic; Sea ice; Southern Ocean
• Online Access: https://dx.doi.org/10.1594/pangaea.714867; https://doi.pangaea.de/10.1594/PANGAEA.714867

The study of radiolarian assemblages from Core MD 962086 provides new information on the variability in the upwelling intensity and origin of upwelled water masses over the past 350 ky in one of the major filamentous regions of the Benguela Upwelling System (BUS), located off Lüderitz, Namibia. The use of key radiolarian species to trace the source of upwelled waters, and the use of a radiolarian-based upwelling index (URI) to reconstruct the upwelling intensity represent the first use of radiolarians for paleoceanographic reconstructions in the BUS. These radiolarian-based proxies indicate strongest upwelling during Marine Isotope Stages (MIS) 3, 5, and 8, which compares well with other studies. While during MIS 3 and 8, the radiolarian-based proxies indicate the influx of waters of Southern Ocean origin, they also point to the increased influence of tropical waters during the lower portion of MIS 5. During MIS 2, 4 and 6 the radiolarian assemblages indicate generally lower upwelling intensities, although ... : Supplement to: Jacot des Combes, Hélène; Abelmann, Andrea (2007): A 350-ky radiolarian record off Lüderitz, Namibia - evidence for changes in the upwelling regime. Marine Micropaleontology, 62(3), 194-210 ...