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Nees, Stefan (1993): Benthic foraminifera of late Quaternary sediments in the northern North Atlantic. PANGAEA, https://doi.org/10.1594/PANGAEA.704509, Supplement to: Nees, S (1993): Spätquartäre Benthosforaminiferen des Europäischen Nordmeeres: Veränderungen der Artengesellschaften und Akkumulationsraten bei Klimawechseln. Berichte aus dem Sonderforschungsbereich 313, Christian-Albrechts-Universität, Kiel, 44, 80 pp, https://doi.org/10.2312/reports-sfb313.1993.44

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Abstract:
Four long sediment cores from locations in the Framstrait, the Norwegian-Greenland Seas and the northern North Atlantic were analysed in a high resolution sampling mode (1 - 2 cm density) for their benthic foraminiferal content. In particular the impact of the intense climatic changes at glacial/interglacial transitions (terminations I and II) on the benthic community have been of special interest. The faunal data were investigated by means of multivariate analysis and represented in their chronological occurence.
The most prominent species of benthic foraminifera in the Norwegian-Greenland Seas are Oridorsalis umbonatus, Cibicidoides wuellerstorfi, the group of Cassidulina, Pyrgo rotalaria, Globocassidulina subglobosa and fragmented tubes of arenaceous species.
The climatic signal of termination I as well as termination II is recorded in the fossil foraminiferal tests as divided transition from glacial to interglacial. The elder INDAR maximum (individuals accumulation rate = individuals/sq cm * 1.000 y; Norwegian-Greenland Seas: average 3.000 - 6.000 individuals/sq cm * 1.000 y; northern North Atlantic: average 150 individuals/sq cm * 1.000 y) is followed by a period of decreased values. The second, younger maximum reaches comparable values as the elder maximum. The interglacial INDAR are in average 700 individuals/sq cm * 1.000 y in the Norwegian-Greenland Seas and 200 individuals/sq cm * 1.000 y in average in the northern North Atlantic.
The occurence of the elder INDAR maximum shows a distinct chronological transgressivity between the northern North Atlantic (12.400 ybp.) and the Framstrait (8.900 ybp.). The time shift from south to north amounts 3.500 yrs., the average expanding velocity 0,78 km per year. Within the Norwegian-Greenland Seas the average expanding velocity amounts 0,48 km per year. This chronological transgressivity is interpreted as impact of the progressive expanding of the North Atlantic and the Norwegian Current during the deglaciation.
The dynamic of the faunal development is defined as increasing INDAR per time. The elder INDAR maximum shows in both glacial/interglacial transitions an exponential increase from south to north. Termination II is characterized by a general higher dynamic as termination I.
By means of the high resolution sampling density the impact of regional isotopic recognized melt-water events is recognized by an increase of endobenthic and t-ubiquitous species in the Norwegian-Greenland Seas sediments. During termination I the relative minimum between both INDAR maxima occur chronological with an decrease of calculated sea surface temperatures.
This is interpreted as indication of the close pelagic - benthic coupling. The climatic signal in the northern North Atlantic recorded in the fossil benthic foraminiferal community shows a lower amplitude as in the Norwegian-Greenland Seas. The occurence of the epibenthic Cibicidoides wuellersforfi allows to evaluate the variability of the bottom water mass. In general at all core locations increasing lateral bottom currents are recognized with the occurence of the second younger INDAR maximum.
In comparison with various paleo-climatological data sets fossil benthic foraminifers show a distinct koherence with changes of the atmospheric temperatures, the SSTs and the postglacial sea level increase. The benthic foraminiferal fauna is bound indirectly on and indicative for regional climatic changes, but principal dependent upon global climatic changes.
Project(s):
Global Environmental Change: The Northern North Atlantic (SFB313)
Coverage:
Median Latitude: 69.147929 * Median Longitude: -0.880287 * South-bound Latitude: 53.536660 * West-bound Longitude: -20.288330 * North-bound Latitude: 76.846300 * East-bound Longitude: 10.943333
Date/Time Start: 1986-07-11T00:00:00 * Date/Time End: 1991-08-22T00:00:00
Event(s):
GIK23068-3 * Latitude: 67.833333 * Longitude: 1.505000 * Date/Time: 1986-07-11T00:00:00 * Elevation: -2230.0 m * Penetration: 8.5 m * Recovery: 4.6 m * Location: Norwegian Sea * Campaign: M2/2 * Basis: Meteor (1986) * Device: Kasten corer (KAL)
GIK23256-1 * Latitude: 73.171667 * Longitude: 10.943333 * Date/Time: 1988-07-10T00:00:00 * Elevation: -2061.0 m * Penetration: 12.75 m * Recovery: 9.6 m * Location: Arctic Ocean * Campaign: M7/2 * Basis: Meteor (1986) * Device: Piston corer (Kiel type) (KOL)
GIK23414-9 (M23414) * Latitude: 53.536660 * Longitude: -20.288330 * Date/Time: 1991-08-22T00:00:00 * Elevation: -2196.0 m * Penetration: 10.5 m * Recovery: 9.08 m * Location: Northeast Atlantic * Campaign: M17/2 * Basis: Meteor (1986) * Device: Kasten corer (KAL)
Size:
11 datasets

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  1. Nees, S; Thiede, J (1993): (Appendix 3) Stable isotope record of Neogloboquadrina pachyderma of sediment core GIK23068-3 in the Norwegian Sea. https://doi.org/10.1594/PANGAEA.66894
  2. Nees, S; Thiede, J (1993): (Appendix 3) Stable isotope record of Neogloboquadrina pachyderma of sediment core GIK23256-1 in the Arctic Ocean. https://doi.org/10.1594/PANGAEA.66895
  3. Nees, S; Thiede, J (1993): (Appendix 3) Stable isotope record of Neogloboquadrina pachyderma of sediment core PS1906-2 in the Greenland Sea. https://doi.org/10.1594/PANGAEA.66896
  4. Nees, S; Thiede, J (1993): (Appendix 6) Benthic foraminifera at termination I in sediment core GIK23068-3 in the Norwegian Sea. https://doi.org/10.1594/PANGAEA.66926
  5. Nees, S; Thiede, J (1993): (Appendix 6) Benthic foraminifera at termination I in sediment core GIK23256-1 in the Arctic Ocean. https://doi.org/10.1594/PANGAEA.66924
  6. Nees, S; Thiede, J (1993): (Appendix 6) Benthic foraminifera at termination I in sediment core GIK23414-9 in the Norwegian Sea. https://doi.org/10.1594/PANGAEA.66928
  7. Nees, S; Thiede, J (1993): (Appendix 6) Benthic foraminifera at termination I in sediment core PS1906-2 in the Greenland Sea. https://doi.org/10.1594/PANGAEA.66914
  8. Nees, S; Thiede, J (1993): (Appendix 6) Benthic foraminifera at termination II in sediment core GIK23068-3 in the Norwegian Sea. https://doi.org/10.1594/PANGAEA.66927
  9. Nees, S; Thiede, J (1993): (Appendix 6) Benthic foraminifera at termination II in sediment core GIK23256-1 in the Arctic Ocean. https://doi.org/10.1594/PANGAEA.66925
  10. Nees, S; Thiede, J (1993): (Appendix 6) Benthic foraminifera at termination II in sediment core GIK23414-9 in the Norwegian Sea. https://doi.org/10.1594/PANGAEA.66929
  11. Nees, S; Thiede, J (1993): (Appendix 6) Benthic foraminifera at termination II in sediment core PS1906-2 in the Greenland Sea. https://doi.org/10.1594/PANGAEA.66915