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Abrantes, Fatima F (1991): Sedimentological and micropaleontological investigation in the upwelling region off Portugal [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.714365, Supplement to: Abrantes, FF (1991): Increased upwelling off Portugal during the last deglaciation: Diatom Evidence. Marine Micropaleontology, 17(3-4), 285-310, https://doi.org/10.1016/0377-8398(91)90017-Z

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Abstract:
Quantitative studies have been carried out on opaline microfossils and diatom assemblage composition and preservation in two latest Quarternary (~100 ka to P.D. ) cores from the continental slope of Portugal. The sites are located in an area of modern summer coastal upwelling created by northerly trade winds. The spatial patterns and intensity of this upwelling system are accurately recorded by the diatom abundances and taxonomic composition in the surface sediments. The diatom record in these sequences indicates that coastal upwelling intensity was similar to present day during late Holocene, interglacial Stage 3 and late Stage 5; higher during Stage 2; and lower in the early Holocene. Paleoproductivity estimates are consistent with the diatom accumulation rates from Stage 3 to the Recent. This indicates that both the diatom and the organic carbon content of the sediments mainly reflect the biological productivity in the euphotic zone.
Coverage:
Median Latitude: 40.629592 * Median Longitude: -10.273823 * South-bound Latitude: 40.572091 * West-bound Longitude: -10.342990 * North-bound Latitude: 40.687094 * East-bound Longitude: -10.204656
Date/Time Start: 1982-11-11T00:00:00 * Date/Time End: 1982-11-11T00:00:00
Event(s):
KS011 * Latitude: 40.687094 * Longitude: -10.204656 * Date/Time: 1982-11-11T00:00:00 * Elevation: -3590.0 m * Recovery: 7.7 m * Campaign: FAEGAS_IV * Basis: Le Noroit * Method/Device: Piston corer (PC)
KS012 * Latitude: 40.572091 * Longitude: -10.342990 * Date/Time: 1982-11-11T00:00:00 * Elevation: -3380.0 m * Recovery: 8.6 m * Campaign: FAEGAS_IV * Basis: Le Noroit * Method/Device: Piston corer (PC)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
8 datasets

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Datasets listed in this publication series

  1. Abrantes, FF (1991): Microfossil content and geochemistry on sediment core KS011. https://doi.org/10.1594/PANGAEA.58775
  2. Abrantes, FF (1991): (Table II) Relative abundances of diatoms in sediment core KS011. https://doi.org/10.1594/PANGAEA.714358
  3. Abrantes, FF (1991): (Table IV) Oxygen isotope composition of planktonic and benthic foraminifera from sediment core KS011. https://doi.org/10.1594/PANGAEA.714363
  4. Abrantes, FF (1991): (Table III) Size measurements of the species Paralia sulcata from sediment core KS011. https://doi.org/10.1594/PANGAEA.714361
  5. Abrantes, FF (1991): Microfossil content and geochemistry on sediment core KS012. https://doi.org/10.1594/PANGAEA.58776
  6. Abrantes, FF (1991): (Table II) Relative abundances of diatoms in sediment core KS012. https://doi.org/10.1594/PANGAEA.714360
  7. Abrantes, FF (1991): (Table IV) Oxygen isotope composition of planktonic and benthic foraminifera from sediment core KS012. https://doi.org/10.1594/PANGAEA.714364
  8. Abrantes, FF (1991): (Table III) Size measurements of the species Paralia sulcata from sediment core KS012. https://doi.org/10.1594/PANGAEA.714362