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Late Younger Dryas ...
Late Younger Dryas and early Holocene palaeoenvironments in the Skagerrak, eastern North Atlantic : a multiproxy study
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Erbs-Hansen, Dorthe Reng (författare)
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Knudsen, Karen Luise (författare)
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Gary, Anthony Cavedo (författare)
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Jansen, Eystein (författare)
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- Gyllencreutz, Richard (författare)
- Stockholms universitet,Institutionen för geologiska vetenskaper
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Scao, Vincent (författare)
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Lambeck, Kurt (författare)
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(creator_code:org_t)
- 2011-03-31
- 2011
- Engelska.
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Ingår i: Boreas. - : Wiley. - 0300-9483 .- 1502-3885. ; 40:4, s. 660-680
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- A high-resolution study of palaeoenvironmental changes through the late Younger Dryas and early Holocene in the Skagerrak, the eastern North Atlantic, is based on multiproxy analyses of core MD99-2286 combined with palaeowater depth modelling for the area. The late Younger Dryas was characterized by a cold ice-distal benthic foraminiferal fauna. After the transition to the Preboreal (c. 11 650 cal. a BP) this fauna was replaced by a Cassidulina neoteretis-dominated fauna, indicating the influence of chilled Atlantic Water at the sea floor. Persisting relatively cold bottom-water conditions until c. 10 300 cal. a BP are presumably a result of an outflow of glacial meltwater from the Baltic area across south-central Sweden, which led to a strong stratification of the water column at MD99-2286, as also indicated by C. neoteretis. A short-term peak in the C/N ratio at c. 10 200 cal. a BP is suggested to indicate input of terrestrial material, which may represent the drainage of an ice-dammed lake in southern Norway, the Glomma event. After the last drainage route across south-central Sweden closed, c. 10 300 cal. a BP, the meltwater influence diminished, and the Skagerrak resembled a fjord with a stable inflow of waters from the North Atlantic through the Norwegian Trench and a gradual increase in boreal species. Full interglacial conditions were established at the sea floor from c. 9250 cal. a BP. Subsequent warm stable conditions were interrupted by a short-term cooling around 8300-8200 cal. a BP, representing the 8.2 ka event.
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