Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

Millo, Christian; Sarnthein, Michael; Voelker, Antje H L; Erlenkeuser, Helmut (2006): Stable carbon and oxygen isotope ratios of foraminifera from Holocene sediments of the North Atlantic [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.727694, Supplement to: Millo, C et al. (2006): Variability of the Denmark Strait Overflow during the Last Glacial Maximum. Boreas, 35(1), 50-60, https://doi.org/10.1111/j.1502-3885.2006.tb01112.x

Always quote citation above when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

Abstract:
The Denmark Strait Overflow (DSO) today compensates for the northward flowing Norwegian and Irminger branches of the North Atlantic Current that drive the Nordic heat pump. During the Last Glacial Maximum (LGM), ice sheets constricted the Denmark Strait aperture in addition to ice eustatic/isostatic effects which reduced its depth (today ~630 m) by ~130 m. These factors, combined with a reduced north-south density gradient of the water-masses, are expected to have restricted or even reversed the LGM DSO intensity. To better constrain these boundary conditions, we present a first reconstruction of the glacial DSO, using four new and four published epibenthic and planktic stable-isotope records from sites to the north and south of the Denmark Strait. The spatial and temporal distribution of epibenthic delta18O and delta13C maxima reveals a north-south density gradient at intermediate water depths from sigma0 ~28.7 to 28.4/28.1 and suggests that dense and highly ventilated water was convected in the Nordic Seas during the LGM. However, extremely high epibenthic delta13C values on top of the Mid-Atlantic Ridge document a further convection cell of Glacial North Atlantic Intermediate Water to the south of Iceland, which, however, was marked by much lower density (sigma0 ~28.1). The north-south gradient of water density possibly implied that the glacial DSO was directed to the south like today and fed Glacial North Atlantic Deep Water that has underthrusted the Glacial North Atlantic Intermediate Water in the Irminger Basin.
Keyword(s):
Ocean Gateways; Oceanpassagen
Project(s):
Impact of Gateways on Ocean Circulation, Climate, and Evolution (OceanGateways)
Funding:
German Research Foundation (DFG), grant/award no. 5468851: Impact of Gateways on Ocean Circulation, Climate, and Evolution
Coverage:
Median Latitude: 64.150747 * Median Longitude: -32.362020 * South-bound Latitude: 61.526000 * West-bound Longitude: -39.067500 * North-bound Latitude: 67.930900 * East-bound Longitude: -25.426500
Date/Time Start: 1995-08-18T00:00:00 * Date/Time End: 2002-07-06T00:44:00
Event(s):
GIK23519-4 * Latitude: 64.799500 * Longitude: -29.597167 * Date/Time: 1995-08-18T00:00:00 * Elevation: -1903.0 m * Penetration: 0.43 m * Recovery: 0.43 m * Location: Greenland Sea * Campaign: POS210/2 * Basis: Poseidon * Method/Device: Giant box corer (GKG) * Comment: weicher sd.Silt
GIK23519-5 * Latitude: 64.797333 * Longitude: -29.595833 * Date/Time: 1995-08-18T00:00:00 * Elevation: -1893.0 m * Recovery: 6.55 m * Location: Greenland Sea * Campaign: POS210/2 * Basis: Poseidon * Method/Device: Gravity corer (Kiel type) (SL)
PS62/003-2 * Latitude: 61.700000 * Longitude: -39.067500 * Date/Time: 2002-07-01T22:36:00 * Elevation: -2192.0 m * Recovery: 12.4 m * Location: Greenland Sea * Campaign: ARK-XVIII/1 (PS62) * Basis: Polarstern * Method/Device: Piston corer (PC) * Comment: 13 core sections: 0-1, 1-2, 2-2.52, 2.52-3.52, 3.52-4.52, 4.52-5.52, 5.52-6.52, 6.52-7.52, 7.52-8.52, 8.52-9.52, 9.52-10.52, 10.52-11.52, 11.52-12.4 m
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
5 datasets

Download Data

Download ZIP file containing all datasets as tab-delimited text — use the following character encoding:

Datasets listed in this publication series

  1. Millo, C; Sarnthein, M; Voelker, AHL et al. (2006): Stable carbon and oxygen isotope ratios of foraminifera from sediment core GIK23519-4. https://doi.org/10.1594/PANGAEA.271547
  2. Millo, C; Sarnthein, M; Voelker, AHL et al. (2006): Stable carbon and oxygen isotope ratios of foraminifera and ages determination of sediment core GIK23519-5. https://doi.org/10.1594/PANGAEA.271549
  3. Millo, C; Sarnthein, M; Voelker, AHL et al. (2006): Stable carbon and oxygen isotope ratios of foraminifera from sediment core PS62/003-2. https://doi.org/10.1594/PANGAEA.271544
  4. Millo, C; Sarnthein, M; Voelker, AHL et al. (2006): Stable carbon and oxygen isotope ratios of foraminifera from sediment core PS62/004-3. https://doi.org/10.1594/PANGAEA.271546
  5. Millo, C; Sarnthein, M; Voelker, AHL et al. (2006): Stable oxygen isotope ratios of foraminifera and age determination of sediment core PS62/015-3. https://doi.org/10.1594/PANGAEA.315661