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Thomas, Nicola C; Ford, Heather L; Greaves, Mervyn; Hodell, David A: IODP Site U1385 paired benthic δ18Ο and Mg/Ca ratios for the past 1.5 Myr, and compiled North Atlantic, Pacific and Global stacks of reconstructed deep-water temperature and δ18Oseawater [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.980075 (dataset in review)

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Abstract:
Data comprises IODP Site U1385 Mg/Ca, Fe/Ca and Mn/Ca ratios measured on infaunal benthic foraminifera Uvigerina peregrina and Globobulimina affinis, along with paired (same sample) oxygen isotope ratios, determined using inductively coupled plasma-optical emission spectrophotometry (ICP-OES) and mass spectrometry in the Godwin Laboratory for Palaeoclimate Research, University of Cambridge. The combined records extend back to ~1.45 Ma, spanning marine isotope stages (MIS) 1–47 and have a mean sampling frequency ~1820 yrs. with the exception of two intervals over MIS 27–21 (~980–860 ka) and MIS 40–37 (~1300–1240 ka; (Birner et al., 2016)) where it increases to ~360 yrs. and ~450 yrs. respectively. Mg/Ca determinations on 47 pairs of duplicate samples provide a pooled standard deviation of 0.092 mmol mol-1 with an overall mean precision of 8.2% r.s.d.. Paired Mg/Ca–δ18O records are used to deconvolve benthic δ18O into its deep-water temperature and δ18Oseawater components. All Mg/Ca ratios were corrected by applying a Mg/Mn ratio value of 0.32 mmol mol-1 to account for the potential presence of authigenic Mn-Fe-oxide coatings on sample foraminiferal calcite (de Lange, van Os and Poorter, 1992; Hasenfratz et al., 2017). δ18O values for Cibicidoides wuellerstorfi and Globobulimina affinis were corrected to Uvigerina by the respective offsets of +0.64 and -0.3 ‰ after Shackleton et al. (2000). All data are referenced to the LR04 stack (Lisiecki and Raymo, 2005) on the age model of Hodell et al. (2023).
Site U1385 PSU Solver (Thirumalai, Quinn and Marino, 2016) deep-water temperature and δ18Oseawater reconstructions and their propagated errors for the past 1.5 Myr, combined over the most recent 0–50 kyr interval with MD01-2444 (Skinner and Elderfield, 2007) and MD99-2334 (offset by a temperature of +0.6°C and δ18Oseawater +0.15‰ to account for its deeper setting) (Skinner, Shackleton and Elderfield, 2003). Iberian Margin deep-water (>2500m) benthic δ18O, temperature and δ18Oseawater are reported on the LR04 timescale (Lisiecki and Raymo, 2005).
Stacked deep-water (>2500m) deconvolved benthic Mg/Ca–δ18O records for the: North Atlantic [IODP Site U1385; Uvigerina peregrina and Globobulimina affinis, and DSDP Site 607; Cibicidoides wuellerstorfi, Oridorsalis umbonatus, and Uvigerina spp. (Sosdian and Rosenthal, 2009; Ford et al., 2016)]; Pacific [ODP Sites 1123; Uvigerina spp. (Elderfield et al., 2012) and Site 1208; Uvigerina spp. (Ford and Raymo, 2020)]; and, global oceans [North Atlantic, Pacific Ocean and ODP Site 1094; Melonis pompilioides (Hasenfratz et al., 2019)] spanning the past 1.5 Myr. To investigate changes in abyssal ocean density stratification across the Middle Pleistocene Transition estimates of deep-water temperature and δ18Oseawater were generated with error propagation using PSU Solver in MATLAB (Thirumalai, Quinn and Marino, 2016). PSU Solver-derived δ18O, temperature and δ18Oseawater records for each site were interpolated on a 3 kyr interval and bootstrapped. Stacks were manually created by first identifying gaps in each site's original data and then averaging the means and errors across each age interval.
Keyword(s):
Atlantic; benthic δ18O; Cibicidoides wuellerstorfi; deep-water temperature; DWT; Globobulimina affinis; IODP Site U1385; MDOT; Mean deep ocean temperature; Mg/Ca paleothermometry; Middle Pleistocene Transition; MPT; Pacific; Uvigerina peregrina; δ18Oseawater
Supplement to:
Thomas, Nicola C; Ford, Heather L; Greaves, Mervyn; Hodell, David A (in prep.): Increased abyssal ocean density stratification across the Middle Pleistocene Transition.
References:
Elderfield, Henry; Ferretti, Patrizia; Greaves, Mervyn; Crowhurst, Simon J; McCave, I Nick; Hodell, David A; Piotrowski, Alexander M (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
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
Ford, Heather L; Raymo, Maureen E (2019): Regional seawater δ18O records and global δ18O seawater-stack over the mid-Pleistocene transition [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.908121
Ford, Heather L; Raymo, Maureen E (2020): Regional and global signals in seawater δ18O records across the mid-Pleistocene transition. Geology, 48(2), 113-117, https://doi.org/10.1130/G46546.1
Ford, Heather L; Sosdian, Sindia M; Rosenthal, Yair; Raymo, Maureen E (2016): Gradual and abrupt changes during the Mid-Pleistocene Transition. Quaternary Science Reviews, 148, 222-233, https://doi.org/10.1016/j.quascirev.2016.07.005
Ford, Heather L; Sosdian, Sindia M; Rosenthal, Yair; Raymo, Maureen E (2016): Uvigerina spp. minor element and derived δ¹⁸Oseawater records over the Mid-Pleistocene Transition (500-1500 kyr), DSDP Hole 94-607 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.864108
Hasenfratz, Adam P; Jaccard, Samuel L; Martínez‐García, Alfredo; Sigman, Daniel M; Hodell, David A; Vance, Derek; Bernasconi, Stefano M; Kleiven, Helga F; Haumann, F Alexander; Haug, Gerald H (2019): Age model / tie points of ODP 1094 (1.5 Ma); δ18O, Mg/Ca, Mn/Ca of planktic and benthic foraminifera, sea surface and bottom water temperature, and δ18O of surface and bottom water of ODP Site 177-1094 (1.5 Ma) [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.901386
Hasenfratz, Adam P; Jaccard, Samuel L; Martínez‐García, Alfredo; Sigman, Daniel M; Hodell, David A; Vance, Derek; Bernasconi, Stefano M; Kleiven, Helga F; Haumann, F Alexander; Haug, Gerald H (2019): The residence time of Southern Ocean surface waters and the 100,000-year ice age cycle. Science, 363(6431), 1080-1084, https://doi.org/10.1126/science.aat7067
Hodell, David A; Crowhurst, Simon J; Lourens, Lucas Joost; Margari, Vasiliki; Nicolson, John; Rolfe, James E; Skinner, Luke C; Thomas, Nicola C; Tzedakis, Polychronis C; Mleneck-Vautravers, Maryline J; Wolff, Eric William (2023): A 1.5-million-year record of orbital and millennial climate variability in the North Atlantic. Climate of the Past, 19(3), 607-636, https://doi.org/10.5194/cp-19-607-2023
Hodell, David A; Crowhurst, Simon J; Lourens, Lucas Joost; Margari, Vasiliki; Nicolson, John; Rolfe, James E; Skinner, Luke C; Thomas, Nicola C; Tzedakis, Polychronis C; Mleneck-Vautravers, Maryline J; Wolff, Eric William (2023): Benthic and planktonic oxygen and carbon isotopes and XRF data at IODP Site U1385 and core MD01-2444 from 0 to 1.5 Ma [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.951401
Skinner, Luke C; Elderfield, Henry (2007): Rapid fluctuations in the deep North Atlantic heat budget during the last glacial period. Paleoceanography, 22(1), 2006PA001338, https://doi.org/10.1029/2006PA001338
Skinner, Luke C; Shackleton, Nicholas J; Elderfield, Henry (2003): Deep-water temperature reconstruction of sediment core MD99-2334 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.738090
Skinner, Luke C; Shackleton, Nicholas J; Elderfield, Henry (2003): Millennial-scale variability of deep-water temperature and d18Odw indicating deep-water source variations in the Northeast Atlantic, 0-34 cal. ka BP. Geochemistry, Geophysics, Geosystems, 4(12), https://doi.org/10.1029/2003GC000585
Skinner, Luke C; Shackleton, Nicholas J; Elderfield, Henry (2007): Deep-water temperature, stable oxygen isotopes and Mg/Ca on benthic foraminifera of sediment core MD99-2334 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.619066
Sosdian, Sindia M; Rosenthal, Yair (2009): Deep-sea temperature and ice volume changes across the Pliocene-Pleistocene climate transitions. Science, 325(5938), 306-310, https://doi.org/10.1126/science.1169938
Thirumalai, Kaustubh; Quinn, Terrence Michael; Marino, Gianluca (2016): Constraining past seawater δ18O and temperature records developed from foraminiferal geochemistry. Paleoceanography, 31(10), 1409-1422, https://doi.org/10.1002/2016PA002970
Project(s):
Integrated Ocean Drilling Program / International Ocean Discovery Program (IODP)
Funding:
Natural Environment Research Council (NERC), grant/award no. NE/K005804/1
Natural Environment Research Council (NERC), grant/award no. NE/R000204/1
Coverage:
Median Latitude: 37.597761 * Median Longitude: -10.131855 * South-bound Latitude: 37.565000 * West-bound Longitude: -10.171333 * North-bound Latitude: 37.801167 * East-bound Longitude: -10.125932
Date/Time Start: 1999-09-14T00:00:00 * Date/Time End: 2011-11-25T00:00:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Size:
5 datasets

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Datasets listed in this bundled publication

  1. Thomas, NC; Ford, HL; Greaves, M et al. (in review): Atlantic, Pacific and Global mean deep ocean temperature and δ18Oseawater stacks. https://doi.pangaea.de/10.1594/PANGAEA.979984
  2. Thomas, NC; Ford, HL; Greaves, M et al. (in review): Paleo-Seawater Uncertainty Solver (PSU Solver), deep-water temperature and δ18Oseawater of IODP Site 339-U1385, MD99-2334 and, MD01-2444. https://doi.pangaea.de/10.1594/PANGAEA.979996
  3. Thomas, NC; Ford, HL; Greaves, M et al. (in review): Globobulimina affinis Mg/Ca ratios and δ18O records of IODP Site 339-U1385. https://doi.pangaea.de/10.1594/PANGAEA.980060
  4. Thomas, NC; Ford, HL; Greaves, M et al. (in review): Uvigerina peregrina Mg/Ca ratios and δ18O records of IODP Site 339-U1385. https://doi.pangaea.de/10.1594/PANGAEA.980064
  5. Thomas, NC; Ford, HL; Greaves, M et al. (in review): Mg/Ca determinations on pairs of duplicate samples from IODP Site 339-U1385. https://doi.pangaea.de/10.1594/PANGAEA.980073