Late Younger Dryas and early Holocene palaeoenvironments in the Skagerrak, eastern North Atlantic: A multiproxy study
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...
Published in: | Boreas |
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Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Taylor & Francis Group
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Subjects: | |
Online Access: | http://hdl.handle.net/1885/69704 https://doi.org/10.1111/j.1502-3885.2011.00205.x https://openresearch-repository.anu.edu.au/bitstream/1885/69704/5/Lambeck_-_Late_Younger_Dryas_and_early_Holocene_palaeoenvironments.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/69704/7/01_Erbs-Hansen_Late_Younger_Dryas_and_early_2011.pdf.jpg |
Summary: | 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. 11650cal. 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. 10300cal. 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. 10200cal. 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. 10300cal. 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. 9250cal. a BP. Subsequent warm stable conditions were interrupted by a short-term cooling around 8300-8200cal. a BP, representing the 8.2ka event. |
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