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- W2093202215 abstract "We reconstructed the Late Quaternary productivity record of two cores of the NW Africa upwelling area. Cores SEDORQUA 20bK and 17aK contain a continuous record down to isotopic stage 7 and show the lateral variability of the palaeoproductivity signal. Several palaeo-environmental proxies, using benthic foraminiferal compositions, have been applied and are confronted with geochemical proxies. In both cores the highest values of palaeoproductivity were registered in glacial stages. These differences between the two cores show that the intensity of upwelling cells descreased to the deeper location core and also that the quality of the input of organic flux becomes predominantly refractory. La paléoproductivité de l'upwelling mauritanien a été reconstruite grâce à l'enregistrement sédimentaire des carottes Sedorqua 20bK et 17aK. Ces enregistrements, du stade isotopique 7 à l'Holocène, montrent la variabilité latérale du signal de l'upwelling. Des marqueurs paléoocéanographiques, basés sur des assemblages de foraminifères benthiques, ont été utilisés et confrontés à des marqueurs géochimiques. Généralement, les plus fortes périodes de productivité, pour les deux carottes, sont notées durant les stades glaciaires. Les différences entre ces deux carottes montrent, non seulement, que l'intensité de l'upwelling diminue vers le site le plus profond, mais aussi que la qualité des apports organiques change ; en effet, ces apports deviennent plus réfractaires." @default.
- W2093202215 created "2016-06-24" @default.
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- W2093202215 date "1999-08-01" @default.
- W2093202215 modified "2023-09-25" @default.
- W2093202215 title "Late Quaternary benthic foraminiferal records testifying lateral variability of the Cape Blanc upwelling signal" @default.
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- W2093202215 doi "https://doi.org/10.1016/s1251-8050(99)80249-3" @default.
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