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Basak, Chandranath; Fröllje, Henning; Lamy, Frank; Gersonde, Rainer; Benz, Verena; Anderson, Robert F; Molina-Kescher, Mario; Pahnke, Katharina (2016): Neodymium isotope data from South Pacific sediment cores [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.858969, Supplement to: Basak, C et al. (2018): Breakup of last glacial deep stratification in the South Pacific. Science, 359(6378), 900-904, https://doi.org/10.1126/science.aao2473

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Published: 2016-03-17 • DOI registered: 2016-04-14

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Abstract:
Stratification of the deep Southern Ocean during the Last Glacial Maximum is thought to have facilitated carbon storage and subsequent release during the deglaciation as stratification broke down, contributing to atmospheric CO2 rise. Here, we present neodymium isotope evidence from deep to abyssal waters in the South Pacific that confirms stratification of the deepwater column during the Last Glacial Maximum. The results indicate a glacial northward expansion of Ross Sea Bottom Water and a Southern Hemisphere climate trigger for the deglacial breakup of deep stratification. It highlights the important role of abyssal waters in sustaining a deep glacial carbon reservoir and Southern Hemisphere climate change as a prerequisite for the destabilization of the water column and hence the deglacial release of sequestered CO2 through upwelling.
Project(s):
Paleoenvironmental Reconstructions from Marine Sediments @ AWI (AWI_Paleo)
Coverage:
Median Latitude: -55.761282 * Median Longitude: -124.410172 * South-bound Latitude: -57.204330 * West-bound Longitude: -151.610830 * North-bound Latitude: -54.215000 * East-bound Longitude: -114.788500
Date/Time Start: 1964-01-01T00:00:00 * Date/Time End: 2009-12-30T08:24:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
5 datasets

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Datasets listed in this publication series

  1. Basak, C; Fröllje, H; Lamy, F et al. (2016): Neodymium isotope data from South Pacific sediment core ELT11.002-PC. https://doi.org/10.1594/PANGAEA.858964
  2. Basak, C; Fröllje, H; Lamy, F et al. (2016): Neodymium isotope data from South Pacific sediment core PS75/054-1. https://doi.org/10.1594/PANGAEA.858965
  3. Basak, C; Fröllje, H; Lamy, F et al. (2016): Neodymium isotope data from South Pacific sediment core PS75/056-1. https://doi.org/10.1594/PANGAEA.858966
  4. Basak, C; Fröllje, H; Lamy, F et al. (2016): Neodymium isotope data from South Pacific sediment core PS75/059-2. https://doi.org/10.1594/PANGAEA.858967
  5. Basak, C; Fröllje, H; Lamy, F et al. (2016): Neodymium isotope data from South Pacific sediment core PS75/073-2. https://doi.org/10.1594/PANGAEA.858968