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Kerr, Joanna; Rickaby, Rosalind E M; Yu, Jimin; Elderfield, Henry; Sadekov, Aleksey Y: The effect of ocean alkalinity and carbon transfer on deep-sea carbonate ion concentration during the past five glacial cycles [dataset publication series]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.892517 (unpublished dataset), Supplement to: Kerr, J et al. (2017): The effect of ocean alkalinity and carbon transfer on deep-sea carbonate ion concentration during the past five glacial cycles. Earth and Planetary Science Letters, 471, 42-53, https://doi.org/10.1016/j.epsl.2017.04.042

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Abstract:
Glacial-interglacial changes in deep Indian and Pacific Ocean carbonate ion concentration ([CO32−]) are mainly driven by two mechanisms that operate on different timescales: 1) a long-term increase during glaciation caused by a reduction in carbonate deposition on shelf areas (i.e, the coral reef hypothesis), and 2) transient carbonate compensation responses to changes in deep ocean carbon storage. To investigate these mechanisms, we use benthic B/Ca to reconstruct deep water [CO32-] in cores from the deep Indian and Equatorial Pacific Oceans during the past five glacial cycles. Based on our reconstructions, we suggest that the redistribution of carbonate deposition from shelf areas to the deep ocean raised deep water [CO32−] on average by 7.3 ± 0.5 (SE) umol/kg during glaciations. Oceanic carbon reorganizations during major climatic transitions caused deep water [CO32−] deviations away from the long-term trend and carbonate compensation processes subsequently acted to restore new steady state conditions. Glacial-interglacial trends in [CO32−] are generally in good agreement with records of sediment carbonate contents (%CaCO3), suggesting that seafloor %CaCO3 is dominated by changes in carbonate preservation in deep water at our studied sites.
Coverage:
Median Latitude: -4.968825 * Median Longitude: 120.496285 * South-bound Latitude: -10.153833 * West-bound Longitude: 51.012819 * North-bound Latitude: 0.318667 * East-bound Longitude: -139.401500
Date/Time Start: 1990-02-17T00:00:00 * Date/Time End: 2001-07-30T15:00:00
Size:
4 datasets

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Datasets listed in this publication series

  1. Kerr, J; Rickaby, REM; Yu, J et al. (2018): B/Ca ratios in benthic foraminifera, carbonate ion concentrations, stable isotopes and reconstructed past seafloor CaCO3 concentrations for ODP Site 130-806. https://doi.org/10.1594/PANGAEA.892511
  2. Kerr, J; Rickaby, REM; Yu, J et al. (validated): B/Ca ratios in benthic foraminifera, carbonate ion concentrations, stable isotopes and reconstructed past seafloor CaCO3 concentrations in sediment core TT013-PC72. https://doi.pangaea.de/10.1594/PANGAEA.892513
  3. Kerr, J; Rickaby, REM; Yu, J et al. (validated): B/Ca ratios in benthic foraminifera and carbonate ion concentrations in sediment core WIND-28K. https://doi.pangaea.de/10.1594/PANGAEA.892515
  4. Kerr, J; Rickaby, REM; Yu, J et al. (validated): Stable isotopes and reconstructed past seafloor CaCO3 concentrations in sediment core WIND-28K. https://doi.pangaea.de/10.1594/PANGAEA.892516