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Bates, Stephanie L; Siddall, Mark; Waelbroeck, Claire (2014): Calculated sea level records and deep ocean temperatures from DSDP and ODP sites [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.854805, Supplement to: Bates, SL et al. (2014): Hydrographic variations in deep ocean temperature over the mid-Pleistocene transition. Quaternary Science Reviews, 88, 147-158, https://doi.org/10.1016/j.quascirev.2014.01.020

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Abstract:
During the mid-Pleistocene transition the dominant 41 ka periodicity of glacial cycles transitioned to a quasi-100 ka periodicity for reasons not yet known. This study investigates the potential role of deep ocean hydrography by examining oxygen isotope ratios in benthic foraminifera. Oxygen isotope records from the Atlantic, Pacific and Indian Ocean basins are separated into their ice volume and local temperature/hydrography components using a piece-wise linear transfer function and a temperature calibration. Although our method has certain limitations, the deep ocean hydrography reconstructions show that glacial deep ocean temperatures approached freezing point as the mid-Pleistocene transition progressed. Further analysis suggests that water mass reorganisation could have been responsible for these temperature changes, leading to such stable conditions in the deep ocean that some obliquity cycles were skipped until precessional forcing triggered deglaciation, creating the apparent quasi-100 ka pattern. This study supports previous work that suggests multiples of obliquity cycles dominate the quasi-100 ka glacial cycles with precession components driving deglaciations.
Related to:
Shackleton, Nicholas J; Berger, A; Peltier, W R (1990): An alternative astronomical calibration of the Lower Pleistocene timescale based on ODP Site 677. Earth and Environmental Science Transactions of the Royal Society of Edinburgh, 81(4), 251-261, https://doi.org/10.1017/S0263593300020782
Project(s):
Deep Sea Drilling Project (DSDP)
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 7.069880 * Median Longitude: -2.399190 * South-bound Latitude: -42.913617 * West-bound Longitude: -171.499000 * North-bound Latitude: 55.484933 * East-bound Longitude: 116.565650
Date/Time Start: 1983-07-06T00:00:00 * Date/Time End: 1999-04-10T00:00:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
10 datasets

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Datasets listed in this publication series

  1. Bates, SL; Siddall, M; Waelbroeck, C (2014): Sea level records and deep ocean temperatures from DSDP site 94-607. https://doi.org/10.1594/PANGAEA.854796
  2. Bates, SL; Siddall, M; Waelbroeck, C (2014): Sea level records and deep ocean temperatures from ODP site 108-659. https://doi.org/10.1594/PANGAEA.854797
  3. Bates, SL; Siddall, M; Waelbroeck, C (2014): Sea level records and deep ocean temperatures from ODP site 121-758. https://doi.org/10.1594/PANGAEA.854798
  4. Bates, SL; Siddall, M; Waelbroeck, C (2014): Sea level records and deep ocean temperatures from ODP site 138-849. https://doi.org/10.1594/PANGAEA.854799
  5. Bates, SL; Siddall, M; Waelbroeck, C (2014): Sea level records and deep ocean temperatures from ODP composite site 162-980/981. https://doi.org/10.1594/PANGAEA.854800
  6. Bates, SL; Siddall, M; Waelbroeck, C (2014): Sea level records and deep ocean temperatures from ODP site 177-1090. https://doi.org/10.1594/PANGAEA.854801
  7. Bates, SL; Siddall, M; Waelbroeck, C (2014): Sea level records and deep ocean temperatures from ODP site 181-1123. https://doi.org/10.1594/PANGAEA.854802
  8. Bates, SL; Siddall, M; Waelbroeck, C (2014): Sea level records and deep ocean temperatures from ODP site 184-1143. https://doi.org/10.1594/PANGAEA.854803
  9. Bates, SL; Siddall, M; Waelbroeck, C (2014): Sea level records and deep ocean temperatures from ODP site 184-1148. https://doi.org/10.1594/PANGAEA.854804
  10. Bates, SL; Siddall, M; Waelbroeck, C (2014): Sea level records and deep ocean temperatures from a composite core of Shackleton et al. (1990). https://doi.org/10.1594/PANGAEA.854795