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Skinner, Luke C; Fallon, Robert D; Waelbroeck, Claire; Michel, Elisabeth; Barker, S (2011): Age determination of sediment cores MD 07-3076 and MD99-2334 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.829760, Supplement to: Skinner, LC et al. (2010): Ventilation of the Deep Southern Ocean and Deglacial CO2 Rise. Science, 328(5982), 1147-1151, https://doi.org/10.1126/science.1183627

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Abstract:
Past glacial-interglacial increases in the concentration of atmospheric carbon dioxide (CO2) are thought to arise from the rapid release of CO2 sequestered in the deep sea, primarily via the Southern Ocean. Here, we present radiocarbon evidence from the Atlantic sector of the Southern Ocean that strongly supports this hypothesis. We show that during the last glacial period, deep water circulating around Antarctica was more than two times older than today relative to the atmosphere. During deglaciation, the dissipation of this old and presumably CO2-enriched deep water played an important role in the pulsed rise of atmospheric CO2 through its variable influence on the upwelling branch of the Antarctic overturning circulation.
Coverage:
Median Latitude: -16.835164 * Median Longitude: -12.875891 * South-bound Latitude: -44.153330 * West-bound Longitude: -14.228170 * North-bound Latitude: 37.801167 * East-bound Longitude: -10.171333
Date/Time Start: 1999-09-14T00:00:00 * Date/Time End: 1999-09-14T00:00:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets

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Datasets listed in this publication series

  1. Skinner, LC; Fallon, RD; Waelbroeck, C et al. (2010): (Table S2) Age determination of sediment core MD07-3076, benthic foraminifera. https://doi.org/10.1594/PANGAEA.829757
  2. Skinner, LC; Fallon, RD; Waelbroeck, C et al. (2010): (Table S1) Age determination of sediment core MD07-3076, planktonic foraminifera. https://doi.org/10.1594/PANGAEA.829756
  3. Skinner, LC; Fallon, RD; Waelbroeck, C et al. (2010): (Table S3) Age determination of sediment core MD99-2334, benthic foraminifera. https://doi.org/10.1594/PANGAEA.829758