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Simstich, Johannes; Sarnthein, Michael; Erlenkeuser, Helmut (2003): Investigation of planktic foraminifera from the Norwegian-Greenland Sea. PANGAEA, https://doi.org/10.1594/PANGAEA.754602, Supplement to: Simstich, J et al. (2003): Paired d18O signals of Neogloboquadrina pachyderma (s) and Turborotalita quinqueloba show thermal stratification in Nordic Seas. Marine Micropaleontology, 48(1-2), 107-125, https://doi.org/10.1016/S0377-8398(02)00165-2

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Abstract:
The vertical density gradients in the Nordic Seas are crucial for the preconditioning of the surface water to thermohaline sinking in winter. These gradients can be reconstructed from paired oxygen isotope data in tests of different species of planktonic foraminifera, the isotopic signatures of which represent different calcification depths in the water column. Comparison of d18O values from foraminiferal tests in plankton hauls, sediment traps, and nearby core top samples with the calculated d18Ocalcite profile of the water column revealed species-specific d18O vital effects and the role of bioturbational admixture of subfossil specimens into the surface sediment. On the basis of core top samples obtained along a west-east transect across various hydrographic regions of the Nordic Seas, d18O values of Turborotalita quinqueloba document apparent calcification depths within the pycnocline at 25-75 m water depth. The isotopic signatures of Neogloboquadrina pachyderma (s) reflect water masses near and well below the pycnocline between 70 and 250 m off Norway, where the Atlantic inflow leads to thermal stratification. Here, temperatures in the calcification depth of N. pachyderma (s) differ from sea surface temperature by approximately -2.5°C. In contrast, N. pachyderma (s) calcifies very close to the sea surface (20-50 m) in the Arctic domain of the western Nordic Seas. However, further west N. pachyderma (s) prefers somewhat deeper, more saline water at 70-130 m well below the halocline that confines the low saline East Greenland Current. This implies that the d18O values of N. pachyderma (s) do not fully reflect the freshwater proportion in surface water and that any reconstruction of past meltwater plumes based on d18O is too conservative, because it overestimates sea surface salinity. Minimum d18O differences (<0.2per mil) between N. pachyderma (s) and T. quinqueloba may serve as proxy for sea regions with dominant haline and absent thermal stratification, whereas thermal stratification leads to d18O differences of >0.4 to >1.5per mil.
Related to:
Simstich, Johannes (1999): Die ozeanische Deckschicht des Europäischen Nordmeers im Abbild stabiler Isotope von Kalkgehäusen unterschiedlicher Planktonforaminiferenarten. (Variations in the oceanic surface layer of the Nordic Seas: the stable-isotope record of polar and subpolar planctonic foraminifera). Berichte-Reports, Institut für Geowissenschaften, Universität Kiel, 2, 96 pp, https://doi.org/10.2312/reports-ifg.1999.2
Project(s):
Global Environmental Change: The Northern North Atlantic (SFB313)
Coverage:
Median Latitude: 70.391689 * Median Longitude: 0.158671 * South-bound Latitude: 53.328300 * West-bound Longitude: -19.145000 * North-bound Latitude: 75.003333 * East-bound Longitude: 7.917830
Date/Time Start: 1984-09-15T00:00:00 * Date/Time End: 1996-07-25T00:54:00
Event(s):
GIK23008-1 * Latitude: 66.931833 * Longitude: 7.917833 * Date/Time: 1985-07-24T00:00:00 * Elevation: -840.0 m * Location: Voring Plateau * Campaign: POS119 * Basis: Poseidon * Method/Device: Giant box corer (GKG)
GIK23071-1 (120-1) * Latitude: 67.085000 * Longitude: 2.906660 * Date/Time: 1986-07-12T00:00:00 * Elevation: -1306.0 m * Location: Norwegian Sea * Campaign: M2/2 * Basis: Meteor (1986) * Method/Device: Giant box corer (GKG)
GIK23270-2 * Latitude: 73.164833 * Longitude: -0.819833 * Date/Time: 1988-07-28T00:00:00 * Elevation: -2768.0 m * Penetration: 0.46 m * Recovery: 0.43 m * Location: Arctic Ocean * Campaign: M7/3 * Basis: Meteor (1986) * Method/Device: Giant box corer (GKG)
Size:
22 datasets

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Datasets listed in this publication series

  1. Simstich, J; Sarnthein, M; Erlenkeuser, H (2003): Foraminifera isotopes of sediment trap NB6. https://doi.org/10.1594/PANGAEA.82210
  2. Simstich, J; Sarnthein, M; Erlenkeuser, H (2003): Foraminifera isotopes of sediment trap NB7. https://doi.org/10.1594/PANGAEA.82212
  3. Simstich, J; Sarnthein, M; Erlenkeuser, H (2003): Foraminifera isotopes of sediment trap OG5. https://doi.org/10.1594/PANGAEA.82211
  4. Simstich, J; Sarnthein, M; Erlenkeuser, H (2003): Nordic Seas surface sediment ages. https://doi.org/10.1594/PANGAEA.81664
  5. Simstich, J; Sarnthein, M; Erlenkeuser, H (2003): Planktic foraminifera counts of multinet M21/4_MSN724. https://doi.org/10.1594/PANGAEA.81988
  6. Simstich, J; Sarnthein, M; Erlenkeuser, H (2003): Planktic foraminifera counts of multinet M21/5_MSN728. https://doi.org/10.1594/PANGAEA.81989
  7. Simstich, J; Sarnthein, M; Erlenkeuser, H (2003): Planktic foraminifera counts of multinet M21/5_MSN732. https://doi.org/10.1594/PANGAEA.81991
  8. Simstich, J; Sarnthein, M; Erlenkeuser, H (2003): Planktic foraminifera counts of multinet PS2616-5. https://doi.org/10.1594/PANGAEA.82001
  9. Simstich, J; Sarnthein, M; Erlenkeuser, H (2003): Planktic foraminifera counts of multinet PS31/002. https://doi.org/10.1594/PANGAEA.81987
  10. Simstich, J; Sarnthein, M; Erlenkeuser, H (2003): Planktic foraminifera counts of multinet PS31/054. https://doi.org/10.1594/PANGAEA.81990
  11. Simstich, J; Sarnthein, M; Erlenkeuser, H (2003): Stable isotopes measured on foraminifera N. pachyderma sinistral from multinet M21/4_MSN724. https://doi.org/10.1594/PANGAEA.81983
  12. Simstich, J; Sarnthein, M; Erlenkeuser, H (2003): Stable isotopes measured on foraminifera N. pachyderma sinistral from multinet M21/5_MSN728. https://doi.org/10.1594/PANGAEA.81985
  13. Simstich, J; Sarnthein, M; Erlenkeuser, H (2003): Stable isotopes measured on foraminifera N. pachyderma sinistral from multinet M21/5_MSN732. https://doi.org/10.1594/PANGAEA.81981
  14. Simstich, J; Sarnthein, M; Erlenkeuser, H (2003): Stable isotopes measured on foraminifera N. pachyderma sinistral from multinet PS2616-5. https://doi.org/10.1594/PANGAEA.81667
  15. Simstich, J; Sarnthein, M; Erlenkeuser, H (2003): Stable isotopes measured on foraminifera N. pachyderma sinistral from multinet PS31/002. https://doi.org/10.1594/PANGAEA.81975
  16. Simstich, J; Sarnthein, M; Erlenkeuser, H (2003): Stable isotopes measured on foraminifera N. pachyderma sinistral from multinet PS31/054. https://doi.org/10.1594/PANGAEA.81979
  17. Simstich, J; Sarnthein, M; Erlenkeuser, H (2003): Stable isotopes measured on foraminifera T. quinqueloba from multinet M21/4_MSN724. https://doi.org/10.1594/PANGAEA.81982
  18. Simstich, J; Sarnthein, M; Erlenkeuser, H (2003): Stable isotopes measured on foraminifera T. quinqueloba from multinet M21/5_MSN728. https://doi.org/10.1594/PANGAEA.81984
  19. Simstich, J; Sarnthein, M; Erlenkeuser, H (2003): Stable isotopes measured on foraminifera T. quinqueloba from multinet M21/5_MSN732. https://doi.org/10.1594/PANGAEA.81980
  20. Simstich, J; Sarnthein, M; Erlenkeuser, H (2003): Stable isotopes measured on foraminifera T. quinqueloba from multinet PS2616-5. https://doi.org/10.1594/PANGAEA.81677
  21. Simstich, J; Sarnthein, M; Erlenkeuser, H (2003): Stable isotopes measured on foraminifera T. quinqueloba from multinet PS31/002. https://doi.org/10.1594/PANGAEA.81977
  22. Simstich, J; Sarnthein, M; Erlenkeuser, H (2003): Stable isotopes measured on foraminifera T. quinqueloba from multinet PS31/054. https://doi.org/10.1594/PANGAEA.81978