Radiolarian fauna of sediment core MD96-2089 off Lüderitz, Namibia ...
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...
Main Authors: | , |
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Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
PANGAEA
2007
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Subjects: | |
Online Access: | https://dx.doi.org/10.1594/pangaea.714867 https://doi.pangaea.de/10.1594/PANGAEA.714867 |
Summary: | 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 ... |
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