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Labeyrie, Laurent D; Duplessy, Jean-Claude (1985): Stable carbon and oxygen isotope analyses of Neogloboquadrina pachyderma [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.726109, Supplement to: Labeyrie, LD; Duplessy, J-C (1985): Changes in the oceanic 13C/12C ratio during the last 140.000 years: high latitude surface water records. Palaeogeography, Palaeoclimatology, Palaeoecology, 50(2-3), 217-240, https://doi.org/10.1016/0031-0182(85)90069-0

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Abstract:
Detailed records of the carbon and oxygen isotopic ratios of Neogloboquadrina pachyderma are compared between nine high-latitude sediment cores, from the Northern and Southern Hemispheres, covering the last 140000 yrs. The strong analogies between the delta13C records permit to define a delta13C stratigraphic scale, with three clear cut transitions simultaneous with the oxygen isotopic transitions 6/5 (125 kyrs.), 5/4 (65 kyrs.), and 2/1 (13 kyrs.). The delta13C records of N. pachyderma in the high-latitude cores, which follow the changes in delta13C of the surface water TCO2 near areas of deep water formation present trends similar to the benthic foraminifera delta13C records in cores V19-30 and M12-392, although amplitudes of the isotopic shifts are different. This implies that a large part of the observed variations represents global changes in the carbon distribution between biosphere and ocean.
The 13C/12C ratios of N. pachyderma in the North Atlantic cores display larger regional variations at 18 kyrs. B.P. than at present. To explain these differences, we have plotted the 18 kyrs. B.P. delta13C values of N. pachyderma from 17 cores distributed N of 40°N. Comparison with published surface water temperature distribution at 18 kyrs. B.P. indicates that a strong divergent cyclonic cell, centered approximatively 55°N and 15°W, was active during most of the last ice-age maximum. This hydrology, analogous to the present Weddell Sea, explains the published evidences of bottom water formation, if located on the northern flank of the gyre, and the strong polar front on the southern flank, probable location of intermediate water formation.
Project(s):
Glacial Atlantic Ocean Mapping (GLAMAP2000)
Coverage:
Median Latitude: 36.874195 * Median Longitude: -4.944505 * South-bound Latitude: -54.060000 * West-bound Longitude: -83.520000 * North-bound Latitude: 79.266700 * East-bound Longitude: 67.440000
Date/Time Start: 1963-04-07T00:00:00 * Date/Time End: 1982-01-01T00:00:00
Event(s):
CH67-19 * Latitude: 45.750000 * Longitude: -3.950000 * Method/Device: Core (CORE)
CH69-32 * Latitude: 45.400000 * Longitude: -5.166700 * Date/Time: 1969-01-01T00:00:00 * Elevation: -4272.0 m * Recovery: 3.2 m * Campaign: CH6X * Basis: Jean Charcot * Method/Device: Piston corer (PC)
CH69-69 * Latitude: 43.833300 * Longitude: -4.500000 * Elevation: -2075.0 m * Recovery: 4.1 m * Campaign: GEOGAS * Method/Device: Piston corer (PC)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
21 datasets

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Datasets listed in this publication series

  1. Labeyrie, LD; Duplessy, J-C (1985): (Table 2) Age model of sediment core CH73-110. https://doi.org/10.1594/PANGAEA.726086
  2. Labeyrie, LD; Duplessy, J-C (1985): (Appendix I) Stable oxygen and carbon isotope ratios of Neogloboquadrina pachyderma from sediment core CH73-110. https://doi.org/10.1594/PANGAEA.726100
  3. Labeyrie, LD; Duplessy, J-C (1985): (Table 2) Age model of sediment core CH73-139. https://doi.org/10.1594/PANGAEA.726087
  4. Labeyrie, LD; Duplessy, J-C (1985): (Appendix I) Stable oxygen and carbon isotope ratios of Neogloboquadrina pachyderma from sediment core CH73-139. https://doi.org/10.1594/PANGAEA.726101
  5. Labeyrie, LD; Duplessy, J-C (1985): (Table 2) Age model of sediment core HU75-41. https://doi.org/10.1594/PANGAEA.726088
  6. Labeyrie, LD; Duplessy, J-C (1985): (Appendix I) Stable oxygen and carbon isotope ratios of Neogloboquadrina pachyderma from sediment core HU75-41. https://doi.org/10.1594/PANGAEA.726102
  7. Labeyrie, LD; Duplessy, J-C (1985): (Table 2) Age model of sediment core HU75-42. https://doi.org/10.1594/PANGAEA.726089
  8. Labeyrie, LD; Duplessy, J-C (1985): (Appendix I) Stable oxygen and carbon isotope ratios of Neogloboquadrina pachyderma from sediment core HU75-42. https://doi.org/10.1594/PANGAEA.726103
  9. Labeyrie, LD; Duplessy, J-C (1985): (Table 2) Age model of sediment core K11. https://doi.org/10.1594/PANGAEA.726090
  10. Labeyrie, LD; Duplessy, J-C (1985): (Appendix I) Stable oxygen and carbon isotope ratios of Neogloboquadrina pachyderma from sediment core K11. https://doi.org/10.1594/PANGAEA.726104
  11. Labeyrie, LD; Duplessy, J-C (1985): (Table 2) Age model of sediment core MD73-025. https://doi.org/10.1594/PANGAEA.726091
  12. Labeyrie, LD; Duplessy, J-C (1985): (Appendix I) Stable oxygen and carbon isotope ratios of Neogloboquadrina pachyderma from sediment core MD73-025. https://doi.org/10.1594/PANGAEA.726105
  13. Labeyrie, LD; Duplessy, J-C (1985): (Table 1) Comparison between δ¹³C of Neogloboquadrina pachyderma and TCO2 d13C of sea water. https://doi.org/10.1594/PANGAEA.726085
  14. Labeyrie, LD; Duplessy, J-C (1985): (Table 2) Age model of sediment core MD80-304. https://doi.org/10.1594/PANGAEA.726092
  15. Labeyrie, LD; Duplessy, J-C (1985): (Appendix I) Stable oxygen and carbon isotope ratios of Neogloboquadrina pachyderma from sediment core MD80-304. https://doi.org/10.1594/PANGAEA.726106
  16. Labeyrie, LD; Duplessy, J-C (1985): (Table 3) Oxygen and carbon isotopic values for the 18 kyrs. B:P: level in different North Atlantic cores, and calculated water TCO2 δ¹³C. https://doi.org/10.1594/PANGAEA.726099
  17. Labeyrie, LD; Duplessy, J-C (1985): (Table 2) Age model of sediment core V19-30. https://doi.org/10.1594/PANGAEA.726093
  18. Labeyrie, LD; Duplessy, J-C (1985): (Table 2) Age model of sediment core V27-60. https://doi.org/10.1594/PANGAEA.726094
  19. Labeyrie, LD; Duplessy, J-C (1985): (Appendix I) Stable oxygen and carbon isotope ratios of Neogloboquadrina pachyderma from sediment core V27-60. https://doi.org/10.1594/PANGAEA.726107
  20. Labeyrie, LD; Duplessy, J-C (1985): (Table 2) Age model of sediment core V27-86. https://doi.org/10.1594/PANGAEA.726095
  21. Labeyrie, LD; Duplessy, J-C (1985): (Appendix I) Stable oxygen and carbon isotope ratios of Neogloboquadrina pachyderma from sediment core V27-86. https://doi.org/10.1594/PANGAEA.726108