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Datasets of project "Spectral Mapping Project (Mapping Species Variability in Global Climate)"

Mostrando recursos 1 - 20 de 82

  1. Age dating and isotopic analyses of sediment core RC11-120

    Martinson, Douglas G; Pisias, Nicklas G; Hays, James D; Imbrie, John D; Moore, Theodore C; Shackleton, Nicholas J
    Using the concept of 'orbital tuning', a continuous, high-resolution deep-sea chronostratigraphy has been developed spanning the last 300,000 yr. The chronology is developed using a stacked oxygen-isotope stratigraphy and four different orbital tuning approaches, each of which is based upon a different assumption concerning the response of the orbital signal recorded in the data. Each approach yields a separate chronology. The error measured by the standard deviation about the average of these four results (which represents the 'best' chronology) has an average magnitude of only 2500 yr. This small value indicates that the chronology produced is insensitive to the specific...

  2. Stable carbon and oxygen isotope ratios of planktonic foraminifera from the equatorial Atlantic

    Curry, William B; Crowley, Thomas J
    Carbon isotopic records of nutrient-depleted surface water place constraints on the past fertility of the oceans and on past atmospheric pCO2 levels. The best records of nutrient-depleted delta13C are obtained from planktonic foraminifera living in the thick mixed layers of the western equatorial and tropical Atlantic Ocean. We have produced a composite, stacked Globigerinoides sacculifer delta13C record from the equatorial Atlantic, which exhibits significant spectral power at the 100,000- and 41,000-year Milankovitch periods, but no power at the 23,000-year period. Similar to the record presented by Shackleton and Pisias [1985], surface-deep ocean Delta delta13C produced with the G. sacculifer record...

  3. Delta delta 13-C data for the V19-30 stack (specmap.069)

    Imbrie, John D; McIntyre, Andrew

  4. Delta delta 13-C data for the Curry-Crowley stack (specmap.068)

    Imbrie, John D; McIntyre, Andrew

  5. Cd/Ca vs time for core A210709-0131PG (specmap.067)

    Imbrie, John D; McIntyre, Andrew

  6. SST vs time for core RC11-120 (specmap.066)

    Imbrie, John D; McIntyre, Andrew

  7. SST vs time for core V25-59 (specmap.061)

    Imbrie, John D; McIntyre, Andrew

  8. SST vs time for core V30-97 (specmap.065)

    Imbrie, John D; McIntyre, Andrew

  9. SST vs time for core V30-49 (specmap.064)

    Imbrie, John D; McIntyre, Andrew

  10. SST vs time for core V30-40 (specmap.063)

    Imbrie, John D; McIntyre, Andrew

  11. SST vs time for core V27-116 (specmap.062)

    Imbrie, John D; McIntyre, Andrew

  12. SST vs time for core V25-56 (specmap.060)

    Imbrie, John D; McIntyre, Andrew

  13. SST vs time for core V25-21 (specmap.059)

    Imbrie, John D; McIntyre, Andrew

  14. SST vs time for core V22-174 (specmap.058)

    Imbrie, John D; McIntyre, Andrew

  15. SST vs time for core V12-122 (specmap.057)

    Imbrie, John D; McIntyre, Andrew

  16. SST vs time for core RC24-16 (specmap.056)

    Imbrie, John D; McIntyre, Andrew

  17. SST vs time for core RC13-228 (specmap.055)

    Imbrie, John D; McIntyre, Andrew

  18. SST vs time for core RC12-294 (specmap.054)

    Imbrie, John D; McIntyre, Andrew

  19. SST vs time for core K708-007 (specmap.053)

    Imbrie, John D; McIntyre, Andrew

  20. SST vs time for core K708-001 (specmap.052)

    Imbrie, John D; McIntyre, Andrew

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