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Dürkoop, Anke; Hale, Walter; Mulitza, Stefan; Pätzold, Jürgen; Wefer, Gerold (1997): Stable isotope data of sediment cores in the western equatorial Atlantic [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.776538, Supplement to: Dürkoop, A et al. (1997): Late Quaternary variations of sea surface salinity and temperature in the western tropical Atlantic: Evidence from d18O of Globigerinoides sacculifer. Paleoceanography, 12(6), 764-772, https://doi.org/10.1029/97PA02270

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Abstract:
In order to reconstruct hydrographic changes during glacial-interglacial cycles for a transequatorial transect we analyzed oxygen isotopes of Globigerinoides sacculifer (without sac-like chamber) and abundances of Globorotalia truncatulinoides (dextral) from FS Meteor cores GeoB 2204-2 (Brazilian continental slope) and GeoB 1523-1 (Ceara Rise). Delta d18O values of G. sacculifer between the two cores were calculated. Modern Delta d18O (G. sacculifer) is ~0.2 per mill between the two core positions, reflecting differences in sea surface salinity (SSS). Higher SSS at GeoB 1523-1 (Ceara Rise) is the result of increased precipitation in the region of the Intertropical Convergence Zone. During glacials the ?18O records from the two cores converge to the same absolute value, resulting in ??18O values of around 0 per mill. Maximum abundances of G. truncatulinoides (dex) correlate with minimum Delta d18O, suggesting a possible increase of SSS at GeoB 1523-1 during stages 2, 3, 4, and 6, which is related to a glacial weakening of the tropical Hadley Cell [Gates, 1976]. Variations in tropical sea surface temperatures are assumed to be low [Climate: Long-Range Investigation, Mapping, and Prediction (CLIMAP), 1981].
Project(s):
Geosciences, University of Bremen (GeoB)
Coverage:
Median Latitude: -12.748974 * Median Longitude: -27.299615 * South-bound Latitude: -30.848333 * West-bound Longitude: -45.881667 * North-bound Latitude: 5.333333 * East-bound Longitude: 3.551667
Date/Time Start: 1991-04-14T00:00:00 * Date/Time End: 1996-03-01T00:00:00
Event(s):
GeoB1408-3 * Latitude: -12.818333 * Longitude: -6.185000 * Date/Time: 1991-04-14T00:00:00 * Elevation: -1848.0 m * Recovery: 0.09 m * Location: Cardno Seamount * Campaign: M16/1 * Basis: Meteor (1986) * Method/Device: MultiCorer (MUC) * Comment: Rohre: (2/6; überstehendes Wasser
GeoB1501-4 * Latitude: -3.678330 * Longitude: -32.006667 * Date/Time: 1991-04-30T00:00:00 * Elevation: -4257.0 m * Recovery: 11.08 m * Location: Brazil Basin * Campaign: M16/2 * Basis: Meteor (1986) * Method/Device: Gravity corer (Kiel type) (SL)
GeoB1503-1 * Latitude: 2.311667 * Longitude: -30.646667 * Date/Time: 1991-05-02T00:00:00 * Elevation: -2306.0 m * Recovery: 5.2 m * Location: Brazil Basin * Campaign: M16/2 * Basis: Meteor (1986) * Method/Device: Gravity corer (Kiel type) (SL)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
13 datasets

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Datasets listed in this publication series

  1. Dürkoop, A; Hale, W; Mulitza, S et al. (1997): Stable isotope data of sediment core GeoB1408-3. https://doi.org/10.1594/PANGAEA.223480
  2. Dürkoop, A; Hale, W; Mulitza, S et al. (1997): Stable isotope data of sediment core GeoB1501-4. https://doi.org/10.1594/PANGAEA.223481
  3. Dürkoop, A; Hale, W; Mulitza, S et al. (1997): Stable isotope data of sediment core GeoB1503-1. https://doi.org/10.1594/PANGAEA.223482
  4. Dürkoop, A; Hale, W; Mulitza, S et al. (1997): Stable isotope data of sediment core GeoB1508-4. https://doi.org/10.1594/PANGAEA.223483
  5. Dürkoop, A; Hale, W; Mulitza, S et al. (1997): Stable isotope data of sediment core GeoB1701-4. https://doi.org/10.1594/PANGAEA.223484
  6. Dürkoop, A; Hale, W; Mulitza, S et al. (1997): Stable isotope data of sediment core GeoB1903-3. https://doi.org/10.1594/PANGAEA.223485
  7. Dürkoop, A; Hale, W; Mulitza, S et al. (2004): Stable isotope data of sediment core GeoB2109-1. https://doi.org/10.1594/PANGAEA.223486
  8. Dürkoop, A; Hale, W; Mulitza, S et al. (1997): Stable isotope data of sediment core GeoB2117-1. https://doi.org/10.1594/PANGAEA.223487
  9. Dürkoop, A; Hale, W; Mulitza, S et al. (1997): Stable isotope data of sediment core GeoB2125-1. https://doi.org/10.1594/PANGAEA.223488
  10. Dürkoop, A; Hale, W; Mulitza, S et al. (1997): Stable isotope data of sediment core GeoB2202-4. https://doi.org/10.1594/PANGAEA.223489
  11. Dürkoop, A; Hale, W; Mulitza, S et al. (1997): Stable isotope data of sediment core GeoB2204-2. https://doi.org/10.1594/PANGAEA.223490
  12. Dürkoop, A; Hale, W; Mulitza, S et al. (1997): Stable isotope data of sediment core GeoB2819-1. https://doi.org/10.1594/PANGAEA.223491
  13. Dürkoop, A; Hale, W; Mulitza, S et al. (2004): Stable isotope data of sediment core GeoB3808-6. https://doi.org/10.1594/PANGAEA.223492