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Ortiz, Joseph D; Mix, Alan C; Harris, Sara E; O'Connell, Suzanne B (1999): Carbonate record in North Atlantic sediments [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.856935, Supplement to: Ortiz, JD et al. (1999): Diffuse spectral reflectance as a proxy for percent carbonate content in North Atlantic sediments. Paleoceanography, 14(2), 171-186, https://doi.org/10.1029/1998PA900021

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Abstract:
Diffuse reflectance records from Feni Drift in the North Atlantic faithfully record sediment percent carbonate. A high-resolution, reflectance-based age model for these sediments derived from an orbitally tuned age model for western equatorial Atlantic, Ceara Rise sediments was generated by spectral frequency mapping. Power spectra of the Feni Drift record indicate statistically significant sub-Milankovitch cyclicity at 7.6-8.4 and 4.8-6.1 kyr. We infer that these ~8 and ~5 kyr cycles document a linkage between North and equatorial Atlantic climate given our ability to correlate these records. These climate cycles influence Atlantic basin carbonate prior to the intensification of Northern Hemisphere glaciation and thus must arise from some portion of the climate system other than the dynamics of large ice sheets. The presence of these peaks, which could be related to equatorial clipped precession, implies a possible non-linear response to Milankovitch forcing.
Related to:
Mix, Alan C; Ortiz, Joseph D; O'Connell, Suzanne B; Harris, Sara E (2012): NOAA/WDS Paleoclimatology - Ortiz et al 1999 North Atlantic Spectral Reflectance Data. NOAA National Centers for Environmental Information, https://doi.org/10.25921/ZR2C-9M02
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 58.706604 * Median Longitude: -19.569883 * South-bound Latitude: 55.484933 * West-bound Longitude: -24.082417 * North-bound Latitude: 61.425317 * East-bound Longitude: -14.702267
Date/Time Start: 1995-07-10T00:00:00 * Date/Time End: 1995-07-29T00:00:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4 datasets

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Datasets listed in this publication series

  1. Ortiz, JD; Mix, AC; Harris, SE et al. (1999): (Appendix A1) Carbonate proxy record of ODP Site 162-980. https://doi.org/10.1594/PANGAEA.856931
  2. Ortiz, JD; Mix, AC; Harris, SE et al. (1999): (Appendix A1) Carbonate proxy record of ODP Site 162-982. https://doi.org/10.1594/PANGAEA.856932
  3. Ortiz, JD; Mix, AC; Harris, SE et al. (1999): (Appendix A1) Carbonate proxy record of ODP Site 162-983. https://doi.org/10.1594/PANGAEA.856933
  4. Ortiz, JD; Mix, AC; Harris, SE et al. (1999): (Appendix A1) Carbonate proxy record of ODP Site 162-984. https://doi.org/10.1594/PANGAEA.856934