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  • 199-1218; COMPCORE; Composite Core; Joides Resolution; Leg199; North Pacific Ocean; Ocean Drilling Program; ODP  (2)
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  • 1
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    Unknown
    Age models and stable isotope analysis on sediment core Site 199-1218 from the equatorial Pacific (2006)
    PANGAEA
    In:  Supplement to: Pälike, Heiko; Norris, Richard D; Herrle, Jens O; Wilson, Paul A; Coxall, Helen; Lear, Caroline H; Shackleton, Nicholas J; Tripati, Aradhna K; Wade, Bridget S (2006): The Heartbeat of the Oligocene Climate System. Science, 314(5807), 1894-1898, https://doi.org/10.1126/science.1133822
    Details
    Publication Date: 2024-04-25
    Description: A 13-million-year continuous record of Oligocene climate from the equatorial Pacific reveals a pronounced "heartbeat" in the global carbon cycle and periodicity of glaciations. This heartbeat consists of 405,000-, 127,000-, and 96,000-year eccentricity cycles and 1.2-million-year obliquity cycles in periodically recurring glacial and carbon cycle events. That climate system response to intricate orbital variations suggests a fundamental interaction of the carbon cycle, solar forcing, and glacial events. Box modeling shows that the interaction of the carbon cycle and solar forcing modulates deep ocean acidity as well as the production and burial of global biomass. The pronounced 405,000-year eccentricity cycle is amplified by the long residence time of carbon in the oceans.
    Keywords: 199-1218; COMPCORE; Composite Core; Joides Resolution; Leg199; North Pacific Ocean; Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 2
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    Unknown
    The biostratigraphy and paleobiology of Oligocene planktonic foraminifera from the equatorial Pacific Ocean (2007)
    PANGAEA
    In:  Supplement to: Wade, Bridget S; Berggren, William A; Olsson, Richard K (2007): The biostratigraphy and paleobiology of Oligocene planktonic foraminifera from the equatorial Pacific Ocean (ODP Site 1218). Marine Micropaleontology, 62(3), 167-179, https://doi.org/10.1016/j.marmicro.2006.08.005
    Details
    Publication Date: 2024-04-25
    Description: Planktonic foraminifera from a continuous Oligocene succession with clear magnetochronology and sediment cycles at Ocean Drilling Program Site 1218 (equatorial Pacific Ocean) were studied in the interval from 27 to 30 Ma. Paragloborotalia taxa are common and we examined their size, relative abundance, and stable isotopes. Multispecies stable isotope data indicate the depth habitats of Oligocene planktonic foraminifera and suggest that “Globoquadrina” venezuelana and Dentoglobigerina globularis were probably mixed-layer dwellers, with paragloborotaliids recording heavier delta18O signatures consistent with a thermocline habitat. Cyclic variations in the abundance of Paragloborotalia match eccentricity (100 kyr) variations in percent carbonate and delta13C, suggesting orbitally forced upwelling in the equatorial Pacific Ocean and that Paragloborotalia were responding directly to changes in surface water productivity. The high-resolution biostratigraphy calibrated to the magnetochronology constrains the extinction of Paragloborotalia opima which marks the top of Planktonic Foraminifera Biozone O5 (P21b) at 27.456 Ma. The highest occurrence of P. opima is associated with a 50% size decrease in Paragloborotalia pseudocontinuosa taxa within Chron 9n. In addition, we find the extinction of Chiloguembelina cubensis is consistent with other deep-sea sections within Chron 10n at 28.426 Ma marking the O4/O5 (P21a/P21b) boundary.
    Keywords: 199-1218; COMPCORE; Composite Core; Joides Resolution; Leg199; North Pacific Ocean; Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
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