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Datasets of project "Glacial Atlantic Mapping and Prediction"

Mostrando recursos 1 - 20 de 348

  1. Database of the GLAMAP project

    Vogelsang, Elke; Sarnthein, Michael; Pflaumann, Uwe
    A uniform chronology for foraminifera-based sea surface temperature records has been established in more than 120 sediment cores obtained from the equatorial and eastern Atlantic up to the Arctic Ocean. The chronostratigraphy of the last 30,000 years is mainly based on published d18O records and 14C ages from accelerator mass spectrometry, converted into calendar-year ages. The high-precision age control provides the database necessary for the uniform reconstruction of the climate interval of the Last Glacial Maximum within the GLAMAP-2000 project.

  2. Age determination and stable isotope composition of sediment cores from the Arctic Ocean

    Nørgaard-Pedersen, Niels; Spielhagen, Robert F; Erlenkeuser, Helmut; Grootes, Pieter Meiert; Heinemeier, Jan; Knies, Jochen
    On the basis of 52 sediment cores, analyzed and dated at high resolution, the paleoceanography and climate of the Last Glacial Maximum (LGM) were reconstructed in detail for the Fram Strait and the eastern and central Arctic Ocean. Sediment composition and stable isotope data suggest three distinct paleoenvironments: (1) a productive region in the eastern to central Fram Strait and along the northern Barents Sea continental margin characterized by Atlantic Water advection, frequent open water conditions, and occasional local meltwater supply and iceberg calving from the Barents Sea Ice Sheet; (2) an intermediate region in the southwestern Eurasian Basin (up...

  3. (Table 2) Age determination of sediment profile PS2887-1/2

    Nørgaard-Pedersen, Niels; Spielhagen, Robert F; Erlenkeuser, Helmut; Grootes, Pieter Meiert; Heinemeier, Jan; Knies, Jochen

  4. (Table 2) Age determination of sediment profile PS2876-1/2

    Nørgaard-Pedersen, Niels; Spielhagen, Robert F; Erlenkeuser, Helmut; Grootes, Pieter Meiert; Heinemeier, Jan; Knies, Jochen

  5. (Table 2) Age determination of sediment profile PS2837-5/6

    Nørgaard-Pedersen, Niels; Spielhagen, Robert F; Erlenkeuser, Helmut; Grootes, Pieter Meiert; Heinemeier, Jan; Knies, Jochen

  6. (Table 2) Age determination of sediment profile PS1535-5/8

    Nørgaard-Pedersen, Niels; Spielhagen, Robert F; Erlenkeuser, Helmut; Grootes, Pieter Meiert; Heinemeier, Jan; Knies, Jochen

  7. (Table 2) Age determination of sediment profile PS1906-1/2

    Nørgaard-Pedersen, Niels; Spielhagen, Robert F; Erlenkeuser, Helmut; Grootes, Pieter Meiert; Heinemeier, Jan

  8. (Table 2) Age determination of sediment profile PS1894-7/9

    Nørgaard-Pedersen, Niels; Spielhagen, Robert F; Erlenkeuser, Helmut; Grootes, Pieter Meiert; Heinemeier, Jan; Knies, Jochen

  9. (Table 2) Age determination of sediment core PS1533-3

    Nørgaard-Pedersen, Niels; Spielhagen, Robert F; Erlenkeuser, Helmut; Grootes, Pieter Meiert; Heinemeier, Jan; Knies, Jochen

  10. (Table 2) Age determination of sediment core OD-041-04

    Nørgaard-Pedersen, Niels; Spielhagen, Robert F; Erlenkeuser, Helmut; Grootes, Pieter Meiert; Heinemeier, Jan; Knies, Jochen

  11. (Table 1) Last Glacial Maximum intervals and stable isotope records of sediment cores in the Arctic Ocean

    Nørgaard-Pedersen, Niels; Spielhagen, Robert F; Erlenkeuser, Helmut; Grootes, Pieter Meiert; Heinemeier, Jan; Knies, Jochen

  12. Age determination of North Atlantic sediment cores

    Bard, Édouard; Fairbanks, Richard G; Maurice, Pierre; Duprat, Josette M; Moyes, Jean; Duplessy, Jean-Claude
    Coupled measurements of delta18O and accelerator mass spectrometry (AMS) 14C in a particular species of planktonic foraminifera may be used to calculate sea-level estimates for the last deglaciation. Of critical importance for this type of study is a knowledge of the seasonality of foraminiferal growth, which can be provided by delta18O measurements of modern shells (core tops, plankton tows). Isotopic (delta18O, AMS-14C dating) and faunal records (transfer function sea surface temperature) were obtained from two cores in the North Atlantic at about 37°N. The locations were chosen to obtain high sedimentation rate records removed from the major ice-melt discharge areas...

  13. (Table 2) Age determination of sediment core SU81-14

    Bard, Édouard; Fairbanks, Richard G; Maurice, Pierre; Duprat, Josette M; Moyes, Jean; Duplessy, Jean-Claude

  14. Stable isotope record of sediment cores from the North Atlantic

    Duplessy, Jean-Claude; Labeyrie, Laurent D; Arnold, Maurice; Paterne, Martine; Duprat, Josette M; van Weering, Tjeerd C E
    Abrupt and short climate changes, such as the Younger Dryas, punctuated the last glacial-to-interglacial transition (Ruddiman and McIntyre, 1981 doi:10.1016/0031-0182(81)90097-3; Duplessy et al., 1981 doi:10.1016/0031-0182(81)90096-1; Oeschger et al. 1984; Broecker et al., 1985 doi:10.1038/315021a0). Broecker et al. (1988 doi:10.1029/PA003i001p00001) proposed that these may have been caused by an interruption of thermohaline circulation as inputs of glacial meltwater freshened the surface waters of the North Atlantic. The finding (Fairbanks, 1989 doi:10.1038/342637a0) that meltwater discharge was minimal during the Younger Dryas, however, led to the suggestion that the surface-water salinity drop might have been caused instead by changes in the freshwater budget...

  15. Stable carbon and oxygen isotope analyses of Neogloboquadrina pachyderma

    Labeyrie, Laurent D; Duplessy, Jean-Claude
    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...

  16. (Appendix I) Stable oxygen and carbon isotope ratios of Neogloboquadrina pachyderma from sediment core V27-86

    Labeyrie, Laurent D; Duplessy, Jean-Claude

  17. (Appendix I) Stable oxygen and carbon isotope ratios of Neogloboquadrina pachyderma from sediment core V27-60

    Labeyrie, Laurent D; Duplessy, Jean-Claude

  18. (Appendix I) Stable oxygen and carbon isotope ratios of Neogloboquadrina pachyderma from sediment core MD80-304

    Labeyrie, Laurent D; Duplessy, Jean-Claude

  19. (Appendix I) Stable oxygen and carbon isotope ratios of Neogloboquadrina pachyderma from sediment core MD73-025

    Labeyrie, Laurent D; Duplessy, Jean-Claude

  20. (Appendix I) Stable oxygen and carbon isotope ratios of Neogloboquadrina pachyderma from sediment core K11

    Labeyrie, Laurent D; Duplessy, Jean-Claude

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