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Paleoceanographic development in the SW Barents Sea during the Late Weichselian–Early Holocene transition

Aagaard-Sørensen, S. ; Husum, K. ; Hald, M. ; Knies, J.

Quaternary science reviews, 2010-12, Vol.29 (25), p.3442-3456 [Peer Reviewed Journal]

Elsevier Ltd

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  • Title:
    Paleoceanographic development in the SW Barents Sea during the Late Weichselian–Early Holocene transition
  • Author: Aagaard-Sørensen, S. ; Husum, K. ; Hald, M. ; Knies, J.
  • Subjects: Marine
  • Is Part Of: Quaternary science reviews, 2010-12, Vol.29 (25), p.3442-3456
  • Notes: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Description: The Late Weichselian–Early Holocene variability of the North Atlantic Current has been studied with focus on the zonal component of this meridional transport during the transition from glacial to interglacial conditions. The investigated sediment core is from 409 m water depth in the SW Barents Sea. Eight Accelerator mass spectrometry (AMS) 14C dates show that the core covers the last 20,000 cal yr B.P. with a centennial scale resolution during Late Weichselian–Early Holocene. Planktic foraminiferal assemblages were analyzed using the >100 μm size fraction and foraminiferal planktic and benthic δ 13C and δ 18O isotopes were measured. Furthermore, a range of physical and chemical analyses has been carried out on the bulk sediment samples. Four time periods have been identified which represent the varying oceanographic conditions in Ingøydjupet, a glacial trough located off the north coast of Norway in the SW Barents Sea. 1) The late glacial (before ca 15,000 cal yr B.P.) influenced by the nearby ice sheets with high amounts of sea ice- or iceberg-transported detritus. 2) The late Oldest Dryas stadial and the Bølling-Allerød interstadial (ca 15,000–12,700 cal yr B.P.) with cold surface water conditions influenced by the collapse of the nearby ice sheets, high amounts of sea ice- or iceberg-transported detritus and melt water and weak subsurface inflow of Atlantic Water. 3) The Younger Dryas cold stadial (12,700–11,650 cal yr B.P.) with low primary productivity and extensive sea ice cover and 4) The Preboreal and Early Holocene (11,650–6800 cal yr B.P. cal yr B.P.) with strong influx of Atlantic Water into the area, near absence of ice rafted debris and generally ameliorated conditions in both surface and bottom water masses as seen from a high flux of foraminifera and increased marine primary production.
  • Publisher: Elsevier Ltd
  • Language: English
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