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Lear, Caroline H; Elderfield, Henry; Wilson, Paul A (2020): Cenozoic Mg/Ca ratios in benthic foraminiferal calcite with BWT and sea ice volume reconstruction [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.913867

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Abstract:
A deep-sea temperature record for the past 50 million years has been produced from the magnesium/calcium ratio (Mg/Ca) in benthic foraminiferal calcite. The record is strikingly similar in form to the corresponding benthic oxygen isotope (δ18O) record and defines an overall cooling of about 12°C in the deep oceans with four main cooling periods. Used in conjunction with the benthic δ18O record, the magnesium temperature record indicates that the first major accumulation of Antarctic ice occurred rapidly in the earliest Oligocene (34 million years ago) and was not accompanied by a decrease in deep-sea temperatures.
Keyword(s):
Cenozoic temperature ice volume Mg/Ca
Supplement to:
Lear, Caroline H; Elderfield, Henry; Wilson, Paul A (2000): Cenozoic Deep-Sea Temperatures and Global Ice Volumes from Mg/Ca in Benthic Foraminiferal Calcite. Science, 287(5451), 269-272, https://doi.org/10.1126/science.287.5451.269
Project(s):
Deep Sea Drilling Project (DSDP)
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -21.603350 * Median Longitude: -44.561787 * South-bound Latitude: -64.517000 * West-bound Longitude: -133.309500 * North-bound Latitude: 3.719100 * East-bound Longitude: 3.100150
Date/Time Start: 1980-05-06T00:00:00 * Date/Time End: 1994-02-21T10:30:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
5 datasets

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Datasets listed in this publication series

  1. Lear, CH; Elderfield, H; Wilson, PA (2020): Magnesium/Calcium ratios of benthic foraminifera of DSDP Site 73-522_Site. https://doi.org/10.1594/PANGAEA.913862
  2. Lear, CH; Elderfield, H; Wilson, PA (2020): Magnesium/Calcium ratios of benthic foraminifera of DSDP Site 85-573_Site. https://doi.org/10.1594/PANGAEA.913863
  3. Lear, CH; Elderfield, H; Wilson, PA (2020): Magnesium/Calcium ratios of benthic foraminifera of ODP Site 113-689. https://doi.org/10.1594/PANGAEA.913864
  4. Lear, CH; Elderfield, H; Wilson, PA (2020): Magnesium/Calcium ratios of benthic foraminifera of ODP Site 154-926A. https://doi.org/10.1594/PANGAEA.913865
  5. Lear, CH; Elderfield, H; Wilson, PA (2020): Compiled Bottom Water Temperatures and oxygen isotope ratios. https://doi.org/10.1594/PANGAEA.913866