Data Description

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Citation:
Bonn, WJ (2009): Sedimentology on Quaternary depoits from the Weddell Sea continental slope. doi:10.1594/PANGAEA.729792,
Supplement to: Bonn, Wolfgang J (1995): Biogenopal und biogenes Barium als Indikatoren für spätquartäre Produktivitätsänderungen am antarktischen Kontinentalhang, atlantischer Sektor (Biogenic opal and barium: Indicators for late Quarternary changes in productivity at the Antarctic continental margin, Atlantic Sector). Berichte zur Polarforschung = Reports on Polar Research, 180, 186 pp, hdl:10013/epic.10181
Abstract:
Sedimentological, geochemical (in particular biogenic content) and physical properties from the Weddell, Lazarev and Cosmonaut seas along the Antarctic continental margin were analysed in order to reconstruct the late Quaternary productivity and sedimentary processes of this region. Seven undisturbed sediment cores were chosen. The sediments represent a depositional period from 400,000 years to the recent time.
The late Quaternary climatic changes influence changes in the paleoenvironmental and the geological conditions, directly forced by the behaviour of the Antarctic ice sheet. All investigated cores are positioned within the oscillating ice sheet area and reflect the influence of the ice sheet in response to the climatic cycles.
The organic carbon, carbonate, biogenic opal, and barium contents were measured, andlor calculated, together with the determination by XRD of the terrigenous components such as quartz and plagioclase (expressed as relative to corundum standard). The contents of organic carbon and carbonate in general are very low. The results provide an indication that organic carbon content is a preservation signal and not a productivity signal. Carbonate is not correlated with biogenic opal and biogenic barium.
Profiles of biogenic opal and barium were measured within the sediment cores providing a qualitative and quantitative tool to estimate changes in paleoproductivity over the investigated time. Generally, good correlations between the barium and opal records of the sediment cores indicate that dissolution of opal in the water column and the sediment does not obscure the surface productivity signal. Therefore, opal can be used in combination with other proxies for paleoproductivity discussions in this area. Maximum paleoproductivity rates (PPmax) during peak warm stages reach values between 82-345 gC/m2/a and maximum export productivity rates (Pnew, max) between 14-177 gC/m2/a, that are representative of high-productivity areas. They are drastically reduced during glacial times (PPmax = 14-107 gC/m2/a, Pnew, max = 1-25 gC/m2/a). The results allow the development of a model for paleoproductivity processes for the last 400,000 years at the Antarctic continental margin of the Atlantic sector. Following the estimated productivity rates it can be concluded that during the last 400,000 years, North Atlantic Deep Water (NADW) heat flux into the southernmost South Atlantic Ocean was restricted to interglacial periods with stronger input of NADW driven deep water circulation during interglacial stages 1, 5 (5.5) and 7.
Related to:
Bonn, Wolfgang J; Fütterer, Dieter K; Grobe, Hannes (1994): Quaternary sedimentation at the Antarctic continental margin. Terra Antartica, 1(2), 319-320, hdl:10013/epic.10991.d001 *
Bonn, Wolfgang J; Gingele, Franz; Grobe, Hannes; Mackensen, Andreas; Fütterer, Dieter K (1998): Palaeoproductivity at the Antarctic continental margin: opal and barium records for the last 400 ka. Palaeogeography, Palaeoclimatology, Palaeoecology, 139(3-4), 195-211, doi:10.1016/S0031-0182(97)00144-2 *
Project(s):
Paleoenvironmental Reconstructions from Marine Sediments @ AWI (AWI_Paleo) *
Silicon Cycling in the World Ocean (SINOPS) *
Coverage:
Median Latitude: -68.870028 * Median Longitude: 3.942647 * South-bound Latitude: -69.773383 * West-bound Longitude: -43.335500 * North-bound Latitude: -62.849500 * East-bound Longitude: 37.480500
Date/Time Start: 1987-12-26T13:05:00 * Date/Time End: 1988-03-01T17:26:00
Event(s):
PS1575-1 (PS12/248) * * Latitude: -62.849500 * Longitude: -43.335500 * Date/Time: 1987-12-26T13:05:00 * Elevation: -3461.0 m * Recovery: 8.51 m * Penetration: 10.70 m * Location: South Orkney * * Campaign: ANT-VI/3 (PS12) * * Basis: Polarstern * * Device: Gravity corer (Kiel type) *
PS1648-1 (PS12/536) * * Latitude: -69.740000 * Longitude: -6.524667 * Date/Time: 1988-03-01T17:26:00 * Elevation: -2529.0 m * Recovery: 8.63 m * Penetration: 10.80 m * Location: Atka Bay * * Campaign: ANT-VI/3 (PS12) * * Basis: Polarstern * * Device: Gravity corer (Kiel type) *
PS1821-6 (PS16/534) * * Latitude: -67.065333 * Longitude: 37.480500 * Date/Time: 1990-04-03T03:19:00 * Elevation: -4027.0 m * Recovery: 15.82 m * Penetration: 18.00 m * Location: Filchner Shelf * * Campaign: ANT-VIII/6 (PS16) * * Basis: Polarstern * * Device: Gravity corer (Kiel type) *
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License:
CC-BY Creative Commons Attribution 3.0 Unported
Size:
44 datasets

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Datasets listed in this Collection

  1. Bonn, WJ (2004): Bulk sedimentological parameters of core PS2037-3. doi:10.1594/PANGAEA.138407
  2. Bonn, WJ (2004): Bulk sedimentological parameters of core PS2039-1. doi:10.1594/PANGAEA.138409
  3. Bonn, WJ (2004): Bulk sedimentological parameters of core PS2040-2. doi:10.1594/PANGAEA.138410
  4. Bonn, WJ (2004): Bulk sedimentological parameters of core PS2044-1. doi:10.1594/PANGAEA.138411
  5. Bonn, WJ (2004): Bulk sedimentological parameters of core PS2045-3. doi:10.1594/PANGAEA.138412
  6. Bonn, WJ (2004): Bulk sedimentological parameters of core PS2046-1. doi:10.1594/PANGAEA.138413
  7. Bonn, WJ (2004): Bulk sedimentological parameters of core PS2047-3. doi:10.1594/PANGAEA.138414
  8. Bonn, WJ (2004): Bulk sedimentological parameters of core PS2049-4. doi:10.1594/PANGAEA.138415
  9. Bonn, WJ (2004): Bulk sedimentological parameters of core PS2050-1. doi:10.1594/PANGAEA.138416
  10. Bonn, WJ (2004): Bulk sedimentological parameters of core PS2055-2. doi:10.1594/PANGAEA.138417
  11. Bonn, WJ (2004): Bulk sedimentological parameters of core PS2056-1. doi:10.1594/PANGAEA.138418
  12. Bonn, WJ (1997): Clay mineralogy and stable isotopes on core PS2049-4. doi:10.1594/PANGAEA.51882
  13. Bonn, WJ (1997): Clay mineralogy of sediment core PS2046-1. doi:10.1594/PANGAEA.51880
  14. Bonn, WJ (1997): Clay mineralogy of sediment core PS2047-3. doi:10.1594/PANGAEA.51881
  15. Bonn, WJ (1997): Coarse fraction analysis and stable isotopes from sediment core PS2045-3. doi:10.1594/PANGAEA.51879
  16. Bonn, WJ (1996): Geochemistry of sediment core PS1575-1. doi:10.1594/PANGAEA.50293
  17. Bonn, WJ (1998): Geochemistry of sediment core PS1648-1. doi:10.1594/PANGAEA.50294
  18. Bonn, WJ (1997): Geochemistry of sediment core PS1821-6. doi:10.1594/PANGAEA.51859
  19. Bonn, WJ (1997): Sedimentology and stable isotopes on core PS2040-2. doi:10.1594/PANGAEA.51878
  20. Bonn, WJ (2004): Sedimentology of core PS1648-1. doi:10.1594/PANGAEA.138310
  21. Bonn, WJ (2004): Sedimentology of core PS1821-6. doi:10.1594/PANGAEA.138311
  22. Bonn, WJ (2004): Sedimentology of core PS2037-3. doi:10.1594/PANGAEA.138312
  23. Bonn, WJ (2004): Sedimentology of core PS2039-1. doi:10.1594/PANGAEA.138314
  24. Bonn, WJ (2004): Sedimentology of core PS2040-2. doi:10.1594/PANGAEA.138315
  25. Bonn, WJ (2004): Sedimentology of core PS2044-1. doi:10.1594/PANGAEA.138316
  26. Bonn, WJ (2004): Sedimentology of core PS2045-3. doi:10.1594/PANGAEA.138317
  27. Bonn, WJ (2004): Sedimentology of core PS2046-1. doi:10.1594/PANGAEA.138318
  28. Bonn, WJ (2004): Sedimentology of core PS2047-3. doi:10.1594/PANGAEA.138319
  29. Bonn, WJ (2004): Sedimentology of core PS2049-4. doi:10.1594/PANGAEA.138320
  30. Bonn, WJ (2004): Sedimentology of core PS2050-1. doi:10.1594/PANGAEA.138321
  31. Bonn, WJ (2004): Sedimentology of core PS2055-2. doi:10.1594/PANGAEA.138322
  32. Bonn, WJ (2004): Sedimentology of core PS2056-1. doi:10.1594/PANGAEA.138323
  33. Bonn, WJ (1997): Sedimentology on core PS2050-1. doi:10.1594/PANGAEA.51883
  34. Bonn, WJ (1997): Sedimentology on core PS2056-1. doi:10.1594/PANGAEA.51885
  35. Bonn, WJ (1997): Stable isotopes on foraminifer N. pachyderma in sediment core PS2055-2. doi:10.1594/PANGAEA.51884
  36. Bonn, WJ (2004): Wet bulk density of sediment core PS1648-1. doi:10.1594/PANGAEA.138298
  37. Bonn, WJ (2004): Wet bulk density of sediment core PS1824-1. doi:10.1594/PANGAEA.138299
  38. Bonn, WJ (1998): Wet bulk density of sediment core PS2038-2. doi:10.1594/PANGAEA.138300
  39. Bonn, WJ (2004): Wet bulk density of sediment core PS2039-1. doi:10.1594/PANGAEA.138301
  40. Bonn, WJ (2004): Wet bulk density of sediment core PS2040-2. doi:10.1594/PANGAEA.138302
  41. Bonn, WJ (2004): Wet bulk density of sediment core PS2045-3. doi:10.1594/PANGAEA.138303
  42. Bonn, WJ (2004): Wet bulk density of sediment core PS2046-1. doi:10.1594/PANGAEA.138304
  43. Bonn, WJ (2004): Wet bulk density of sediment core PS2055-2. doi:10.1594/PANGAEA.138305
  44. Bonn, WJ (2004): Wet bulk density of sediment core PS2056-1. doi:10.1594/PANGAEA.138306