A high-resolution Lateglacial and Holocene palaeoceanographic record from the Greenland Sea.

Telesinski, Maciej, Spielhagen, Robert F. and Lind, Ewa M. (2014) A high-resolution Lateglacial and Holocene palaeoceanographic record from the Greenland Sea. Boreas, 43 (2). pp. 273-285. DOI 10.1111/bor.12045.

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Abstract

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.

Document Type: Article
Funder compliance: info:eu-repo/grantAgreement/EC/FP7/238111
Keywords: paleoceanography, lateglacial, deglaciation, holocene, foraminifera, stable isotopes, Greenland Sea, Nordic Seas
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1111/bor.12045
ISSN: 0300-9483
Projects: CASE ITN, Transdrift, Laptev Sea System
Date Deposited: 23 Oct 2013 10:22
Last Modified: 04 Jun 2014 11:16
URI: http://oceanrep.geomar.de/id/eprint/22222

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