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Ronge, Thomas A; Tiedemann, Ralf; Lamy, Frank; Köhler, Peter; Alloway, Brent V; De Pol-Holz, Ricardo; Pahnke, Katharina; Southon, John; Wacker, Lukas (2016): Age determination of seven sediment cores from the South Pacific Ocean [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.833663, Supplement to: Ronge, TA et al. (2016): Radiocarbon constraints on the extent and evolution of the South Pacific carbon pool. Nature Communications, 7, 12 pp, https://doi.org/10.1038/ncomms11487

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DOI registered: 2016-04-25 • Published: 2016-04-25

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Abstract:
During the last deglaciation, the opposing patterns of atmospheric CO2 and radiocarbon activities (D14C) suggest the release of 14C-depleted CO2 from old carbon reservoirs. Although evidences point to the deep Pacific as a major reservoir of this 14C-depleted carbon, its extent and evolution still need to be constrained. Here we use sediment cores retrieved along a South Pacific transect to reconstruct the spatio-temporal evolution of D14C over the last 30,000 years. In ~2,500-3,600 m water depth, we find 14C-depleted deep waters with a maximum glacial offset to atmospheric 14C (DD14C = -1,000 per mil). Using a box model, we test the hypothesis that these low values might have been caused by an interaction of aging and hydrothermal CO2 influx. We observe a rejuvenation of circumpolar deep waters synchronous and potentially contributing to the initial deglacial rise in atmospheric CO2. These findings constrain parts of the glacial carbon pool to the deep South Pacific.
Project(s):
Paleoenvironmental Reconstructions from Marine Sediments @ AWI (AWI_Paleo)
Coverage:
Median Latitude: -46.677103 * Median Longitude: -175.385287 * South-bound Latitude: -54.215000 * West-bound Longitude: 174.525500 * North-bound Latitude: -44.769170 * East-bound Longitude: -125.425500
Date/Time Start: 1997-05-20T11:11:00 * Date/Time End: 2011-03-04T13:15:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
25 datasets

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Datasets listed in this publication series

  1. Ronge, TA; Tiedemann, R; Lamy, F et al. (2017): Strontium XRF core scans of sediment core MD97-2120. https://doi.org/10.1594/PANGAEA.877303
  2. Ronge, TA; Tiedemann, R; Lamy, F et al. (2016): Radiocarbon datings on Globigerina bulloides of sediment core PS75/059-2. https://doi.org/10.1594/PANGAEA.833643
  3. Ronge, TA; Tiedemann, R; Lamy, F et al. (2016): Radiocarbon datings on benthic forminifera of sediment core PS75/059-2. https://doi.org/10.1594/PANGAEA.833654
  4. Ronge, TA; Tiedemann, R; Lamy, F et al. (2016): Age model of sediment core PS75/059-2. https://doi.org/10.1594/PANGAEA.861424
  5. Ronge, TA; Tiedemann, R; Lamy, F et al. (2016): Radiocarbon datings on Globigerina bulloides of sediment core PS75/100-4. https://doi.org/10.1594/PANGAEA.833644
  6. Ronge, TA; Tiedemann, R; Lamy, F et al. (2016): Radiocarbon datings on benthic forminifera of sediment core PS75/100-4. https://doi.org/10.1594/PANGAEA.833655
  7. Ronge, TA; Tiedemann, R; Lamy, F et al. (2016): Age model of sediment core PS75/100-4. https://doi.org/10.1594/PANGAEA.861425
  8. Ronge, TA; Tiedemann, R; Lamy, F et al. (2016): Radiocarbon datings on Globigerina bulloides of sediment core PS75/104-1. https://doi.org/10.1594/PANGAEA.833645
  9. Ronge, TA; Tiedemann, R; Lamy, F et al. (2016): Radiocarbon datings on benthic forminifera of sediment core PS75/104-1. https://doi.org/10.1594/PANGAEA.833656
  10. Ronge, TA; Tiedemann, R; Lamy, F et al. (2016): Age model of sediment core PS75/104-1. https://doi.org/10.1594/PANGAEA.861426
  11. Ronge, TA; Tiedemann, R; Lamy, F et al. (2016): Radiocarbon datings on Globigerina bulloides of sediment core SO213/2_76-2. https://doi.org/10.1594/PANGAEA.833650
  12. Ronge, TA; Tiedemann, R; Lamy, F et al. (2016): Radiocarbon datings on benthic forminifera of sediment core SO213/2_76-2. https://doi.org/10.1594/PANGAEA.833657
  13. Ronge, TA; Tiedemann, R; Lamy, F et al. (2016): Age model of sediment core SO213/2_76-2. https://doi.org/10.1594/PANGAEA.861427
  14. Ronge, TA; Tiedemann, R; Lamy, F et al. (2016): Mean major element composition of glass shards from sediment core SO213/2_76-2. https://doi.org/10.1594/PANGAEA.833661
  15. Ronge, TA; Tiedemann, R; Lamy, F et al. (2017): Strontium XRF core scans of sediment core SO213/2_76-2. https://doi.org/10.1594/PANGAEA.877304
  16. Ronge, TA; Tiedemann, R; Lamy, F et al. (2016): Radiocarbon datings on Globigerina bulloides of sediment core SO213/2_79-2. https://doi.org/10.1594/PANGAEA.833651
  17. Ronge, TA; Tiedemann, R; Lamy, F et al. (2016): Radiocarbon datings on benthic forminifera of sediment core SO213/2_79-2. https://doi.org/10.1594/PANGAEA.833658
  18. Ronge, TA; Tiedemann, R; Lamy, F et al. (2016): Age model of sediment core SO213/2_79-2. https://doi.org/10.1594/PANGAEA.861428
  19. Ronge, TA; Tiedemann, R; Lamy, F et al. (2016): Mean major element composition of glass shards from sediment core SO213/2_79-2. https://doi.org/10.1594/PANGAEA.833662
  20. Ronge, TA; Tiedemann, R; Lamy, F et al. (2016): Radiocarbon datings on Globigerina bulloides of sediment core SO213/2_82-1. https://doi.org/10.1594/PANGAEA.833652
  21. Ronge, TA; Tiedemann, R; Lamy, F et al. (2016): Radiocarbon datings on benthic forminifera of sediment core SO213/2_82-1. https://doi.org/10.1594/PANGAEA.833659
  22. Ronge, TA; Tiedemann, R; Lamy, F et al. (2016): Age model of sediment core SO213/2_82-1. https://doi.org/10.1594/PANGAEA.861429
  23. Ronge, TA; Tiedemann, R; Lamy, F et al. (2016): Radiocarbon datings on Globigerina bulloides of sediment core SO213/2_84-1. https://doi.org/10.1594/PANGAEA.833653
  24. Ronge, TA; Tiedemann, R; Lamy, F et al. (2016): Radiocarbon datings on benthic forminifera of sediment core SO213/2_84-1. https://doi.org/10.1594/PANGAEA.833660
  25. Ronge, TA; Tiedemann, R; Lamy, F et al. (2016): Age model of sediment core SO213/2_84-1. https://doi.org/10.1594/PANGAEA.861430