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Elderfield, Henry; Ferretti, Patrizia; Greaves, Mervyn; Crowhurst, Simon J; McCave, I Nick; Hodell, David A; Piotrowski, Alexander M (2012): Stable oxygen isotope record and Mg/Ca ratios at the Mid-Pleistocene Climate Transition, ODP Site 181-1123 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.786205, Supplement to: Elderfield, H et al. (2012): Evolution of ocean temperature and ice volume through the Mid-Pleistocene Climate Transition. Science, 337(6095), 704-709, https://doi.org/10.1126/science.1221294

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Published: 2012-07-17 • DOI registered: 2012-09-10

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Abstract:
Earth's climate underwent a fundamental change between 1250 and 700 thousand years ago, the Mid-Pleistocene Transition (MPT), when the dominant periodicity of climate cycles changed from 41,000 to 100,000 years in the absence of significant change in orbital forcing. Over this time, an increase occurred in the amplitude of change of deep ocean foraminiferal oxygen isotopic ratios, traditionally interpreted as defining the main rhythm of ice ages although containing large effects of changes in deep-ocean temperature. We have separated the effects of decreasing temperature and increasing global ice volume on oxygen isotope ratios. Our results suggest that the MPT was initiated by an abrupt increase in Antarctic ice volume at 900 ka. We see no evidence of a pattern of gradual cooling but near-freezing temperatures occur at every glacial maximum.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -41.785984 * Median Longitude: -171.498999 * South-bound Latitude: -41.786000 * West-bound Longitude: -171.499000 * North-bound Latitude: -41.785780 * East-bound Longitude: -171.498980
Date/Time Start: 1998-09-12T00:00:00 * Date/Time End: 1998-09-24T10:00:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
7 datasets

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Datasets listed in this publication series

  1. Elderfield, H; Ferretti, P; Greaves, M et al. (2012): (Table S3) Mg/Ca, Fe/Ca and Mn/Ca ratios, and stable isotope ratios of Cibicidoides wuellerstorfi of ODP Site 181-1123 "cold samples". https://doi.org/10.1594/PANGAEA.786181
  2. Elderfield, H; Ferretti, P; Greaves, M et al. (2012): Interpolated seawater stable oxygen isotope ratios and relative sea level reconstruction for ODP Site 181-1123. https://doi.org/10.1594/PANGAEA.786204
  3. Elderfield, H; Ferretti, P; Greaves, M et al. (2012): Interpolated stable oxygen isotope ratios for ODP Site 181-1123. https://doi.org/10.1594/PANGAEA.786183
  4. Elderfield, H; Ferretti, P; Greaves, M et al. (2012): (Table S1) Mg/Ca ratios and stable oxygen and carbon isotope ratios of Uvigerina spp. of ODP Site 181-1123. https://doi.org/10.1594/PANGAEA.786178
  5. Elderfield, H; Ferretti, P; Greaves, M et al. (2012): (Table S2) Mg/Ca, Fe/Ca and Mn/Ca ratios of ODP Site 181-1123 samples. https://doi.org/10.1594/PANGAEA.786180
  6. Elderfield, H; Ferretti, P; Greaves, M et al. (2012): Measured and normalized Mg/Ca ratios of ODP Site 181-1123 samples. https://doi.org/10.1594/PANGAEA.786195
  7. Elderfield, H; Ferretti, P; Greaves, M et al. (2012): Interpolated and normalized Mg/Ca ratios for ODP Site 181-1123. https://doi.org/10.1594/PANGAEA.786198