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Huber, Robert; Meggers, Helge; Baumann, Karl-Heinz; Raymo, Maureen E; Henrich, Rüdiger (2000): Shell size variation of Neogloboquadrina pachyderma sin. in the Norwegian-Greenland Sea during the last 1.3 Myr. PANGAEA, https://doi.org/10.1594/PANGAEA.704662, Supplement to: Huber, R et al. (2000): Shell size variation of the planktonic foraminifer Neogloboquadrina pachyderma sin. in the Norwegian-Greenland Sea during the last 1.3 Myrs: implications for paleoceanographic reconstructions. Palaeogeography, Palaeoclimatology, Palaeoecology, 160(3-4), 193-212, https://doi.org/10.1016/S0031-0182(00)00066-3

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Abstract:
We present measurements of the maximum diameter of the planktonic foraminifer Neogloboquadrina pachyderma sin. from six sediment cores (Ocean Drilling Program sites 643, 644, 907, 909, 985 and 987) from the Norwegian-Greenland Sea. Our data show a distinct net increase in mean shell size of N. pachyderma sin. at all sites during the last 1.3 Ma, with largest shell sizes reached after 0.4 Ma. External factors such as glacial-interglacial variability and carbonate dissolution alone cannot account for the observed variation in mean shell size of N. pachyderma sin. We consider the observed shell size increase to mirror an evolutionary trend towards better adaptation of N. pachyderma sin. to the cold water environment after 1.1-1.0 Ma. Probably, the Mid Pleistocene climate shift and the associated change of amplitude and frequency of glacial-interglacial fluctuations have triggered the evolution of this planktonic foraminifer. Oxygen and carbon stable isotope analyses of different shell size classes indicate that the observed shell size increase could not be explained by the functional concept that larger shells promote increasing sinking velocities during gametogenesis. For paleoceanographic reconstructions, the evolutionary adaptation of Neogloboquadrina pachyderma sin. to the cold water habitat has significant implications. Carbonate sedimentation in highest latitudes is highly dependent on the presence of this species. In the Norwegian-Greenland Sea, carbonate-poor intervals before 1.1 Ma are, therefore, not necessarily related to severe glacial conditions. They are probably attributed to the absence of this not yet polar-adapted species. Further, transfer function and modern analog techniques used for the reconstruction of surface water conditions in high latitudes could, therefore, contain a large range of errors if they were applied to samples older than 1.1-1.0 Myrs.
Project(s):
Coverage:
Median Latitude: 69.515338 * Median Longitude: -4.979019 * South-bound Latitude: 66.678300 * West-bound Longitude: -17.936733 * North-bound Latitude: 78.584600 * East-bound Longitude: 4.576700
Date/Time Start: 1985-08-03T00:00:00 * Date/Time End: 1995-09-01T00:00:00
Event(s):
104-643 * Latitude: 67.715000 * Longitude: 1.033300 * Date/Time Start: 1985-08-03T00:00:00 * Date/Time End: 1985-08-08T00:00:00 * Elevation: -2780.0 m * Penetration: 565.2 m * Recovery: 458.3 m * Location: Norwegian Sea * Campaign: Leg104 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 62 cores; 565.2 m cored; 0 m drilled; 81.1% recovery
104-644 * Latitude: 66.678300 * Longitude: 4.576700 * Date/Time Start: 1985-08-08T00:00:00 * Date/Time End: 1985-08-10T00:00:00 * Elevation: -1226.0 m * Penetration: 380.5 m * Recovery: 342.1 m * Location: Norwegian Sea * Campaign: Leg104 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 49 cores; 380.5 m cored; 0 m drilled; 89.9% recovery
151-907 * Latitude: 69.249800 * Longitude: -12.698200 * Date/Time Start: 1993-08-05T00:00:00 * Date/Time End: 1993-08-08T00:00:00 * Elevation: -1812.0 m * Penetration: 224.1 m * Recovery: 230 m * Location: Iceland Sea * Campaign: Leg151 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 26 cores; 224.1 m cored; 0 m drilled; 102.6% recovery
Comment:
For calcium carbonate concentrations see Huber et al. (2000b) data sets: doi:10.1594/PANGAEA.704663
Size:
7 datasets

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Datasets listed in this publication series

  1. Huber, R; Meggers, H; Baumann, K-H et al. (2000): (Table 2) Stable oxygen and carbon isotope composition of Neogloboquadrina pachyderma from ODP Site 162-985 in the Norway Basin. https://doi.org/10.1594/PANGAEA.704630
  2. Huber, R; Meggers, H; Baumann, K-H et al. (2000): (Table 3) Morphometric measurements of Neogloboquadrina pachyderma sin. from ODP Site 104-643 on the outer Voring Plateau. https://doi.org/10.1594/PANGAEA.704631
  3. Huber, R; Meggers, H; Baumann, K-H et al. (2000): (Table 3) Morphometric measurements of Neogloboquadrina pachyderma sin. from ODP Site 104-644 on the inner Voring Plateau. https://doi.org/10.1594/PANGAEA.704632
  4. Huber, R; Meggers, H; Baumann, K-H et al. (2000): (Table 3) Morphometric measurements of Neogloboquadrina pachyderma sin. from ODP Site 151-907 on the Iceland Plateau. https://doi.org/10.1594/PANGAEA.704633
  5. Huber, R; Meggers, H; Baumann, K-H et al. (2000): (Table 3) Morphometric measurements of Neogloboquadrina pachyderma sin. from ODP Site 151-909 in the Fram Strait. https://doi.org/10.1594/PANGAEA.704634
  6. Huber, R; Meggers, H; Baumann, K-H et al. (2000): (Table 3) Morphometric measurements of Neogloboquadrina pachyderma sin. from ODP Site 162-985 in the Norway Basin. https://doi.org/10.1594/PANGAEA.704635
  7. Huber, R; Meggers, H; Baumann, K-H et al. (2000): (Table 3) Morphometric measurements of Neogloboquadrina pachyderma sin. from ODP Site 162-987 on the Greenland Margin. https://doi.org/10.1594/PANGAEA.704636