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Millo, Christian; Sarnthein, Michael; Erlenkeuser, Helmut; Frederichs, Thomas (2005): Stable carbon and oxygen isotope record of Neogloboquadrina pachyderma and Cibicides lobatulus from the southwestern Greenland Sea [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.738187, Supplement to: Millo, C et al. (2005): Methane-driven late Pleistocene d13C minima and overflow reversals in the southwestern Greenland Sea. Geology, 33(11), 873-876, https://doi.org/10.1130/G21790.1

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Abstract:
A core transect across the southwestern Greenland Sea reveals coeval events of extremely negative planktic and benthic delta13C excursions between 40 and 87 ka. The most pronounced event, event 1, began at peak Dansgaard-Oeschger stadial 22 (85 ka) with a duration of 18 k.y. During this episode, incursions of Atlantic Intermediate Water caused a bottom-water warming of up to 8 °C. The amplitude, timing, and geographic pattern of the delta13C events suggest that this bottom-water warming triggered clathrate instability along the East Greenland slope and a methane-induced depletion of delta13CDIC (DIC- dissolved inorganic carbon). Since delta13C event 1 matches a major peak in atmospheric CH4 concentration, this clathrate destabilization may have contributed to the rise in atmospheric CH4 and thus to climate warming over marine isotope stage 5.1.
Keyword(s):
Ocean Gateways; Oceanpassagen
Project(s):
Impact of Gateways on Ocean Circulation, Climate, and Evolution (OceanGateways)
Institute for Geosciences, Christian Albrechts University, Kiel (GIK/IfG)
Funding:
German Research Foundation (DFG), grant/award no. 5468851: Impact of Gateways on Ocean Circulation, Climate, and Evolution
Coverage:
Median Latitude: 67.890600 * Median Longitude: -25.005750 * South-bound Latitude: 67.850300 * West-bound Longitude: -25.426500 * North-bound Latitude: 67.930900 * East-bound Longitude: -24.585000
Date/Time Start: 2002-07-06T00:44:00 * Date/Time End: 2002-07-06T10:32:00
Event(s):
PS62/015-3 * Latitude: 67.930900 * Longitude: -25.426500 * Date/Time: 2002-07-06T00:44:00 * Elevation: -1013.0 m * Recovery: 6.36 m * Location: Iceland Sea * Campaign: ARK-XVIII/1 (PS62) * Basis: Polarstern * Method/Device: Piston corer (PC) * Comment: 7 core sections: 0-1, 1-1.53, 1.53-2.53, 2.53-3.53, 3.53-4.53, 4.53-5.53, 5.53-6.36 m
PS62/017-4 * Latitude: 67.850300 * Longitude: -24.585000 * Date/Time: 2002-07-06T10:32:00 * Elevation: -1502.0 m * Recovery: 6.32 m * Location: Iceland Sea * Campaign: ARK-XVIII/1 (PS62) * Basis: Polarstern * Method/Device: Piston corer (PC) * Comment: 7 core sections: 0-1, 1-1.48, 1.48-2.48, 2.48-3.48, 3.48-4.48, 4.48-5.48, 5.48-6.32 m
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets

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Datasets listed in this publication series

  1. Millo, C; Sarnthein, M; Erlenkeuser, H et al. (2005): Stable isotopes of foraminifera from sediment core PS62/015-3. https://doi.org/10.1594/PANGAEA.315662
  2. Millo, C; Sarnthein, M; Erlenkeuser, H et al. (2005): Stable isotopes of Neogloboquadrina pachyderma s. from sediment core PS62/017-4. https://doi.org/10.1594/PANGAEA.271542