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A high-resolution Lateglacial and Holocene palaeoceanographic record from the Greenland Sea
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology.
Number of Authors: 3
2014 (English)In: Boreas, ISSN 0300-9483, E-ISSN 1502-3885, Vol. 43, no 2, 273-285 p.Article in journal (Refereed) Published
Abstract [en]

We present an unprecedented multicentennial sediment record from the foot of Vesterisbanken Seamount, central Greenland Sea, covering the past 22.3 thousand years (ka). Based on planktic foraminiferal total abundances, species assemblages, and stable oxygen and carbon isotopes, the palaeoenvironments in this region of modern deepwater renewal were reconstructed. Results show that during the Last Glacial Maximum the area was affected by harsh polar conditions with only episodic improvements during warm summer seasons. Since 18 ka extreme freshwater discharges from nearby sources occurred, influencing the surface water environment. The last major freshwater event took place during the Younger Dryas. The onset of the Holocene was characterized by an improvement of environmental conditions suggesting warming and increasing ventilation of the upper water layers. The early Holocene saw a stronger Atlantic waters advection to the area, which began around 10.5 and ended quite rapidly at 5.5 ka, followed by the onset of Neoglacial cooling. Surface water ventilation reached a maximum in the middle Holocene. Around 3 ka the surface water stratification increased leading to subsequent amplification of the warming induced the North Atlantic Oscillation at 2 ka.

Place, publisher, year, edition, pages
2014. Vol. 43, no 2, 273-285 p.
National Category
Physical Geography Geology
Identifiers
URN: urn:nbn:se:su:diva-105234DOI: 10.1111/bor.12045ISI: 000333455400001OAI: oai:DiVA.org:su-105234DiVA: diva2:731681
Funder
EU, FP7, Seventh Framework Programme, 238111
Note

AuthorCount:3;

Available from: 2014-07-02 Created: 2014-06-24 Last updated: 2017-12-05Bibliographically approved

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