Evolution of the central Nordic Seas over the last 20 thousand years.

Telesinski, Maciej M., Bauch, Henning A., Spielhagen, Robert F. and Kandiano, Evgeniya S. (2015) Evolution of the central Nordic Seas over the last 20 thousand years. Quaternary Science Reviews, 121 . pp. 98-109. DOI 10.1016/j.quascirev.2015.05.013.

[img] Text
Telesinski et.al.pdf - Published Version
Restricted to Registered users only

Download (1236Kb) | Contact

Supplementary data:

Abstract

The deep and surface water paleoceanographic evolution of the central Nordic Seas over the last 20 thousand years was reconstructed using various micropaleontological, isotopic and lithological proxy data. These show a high spatial and temporal complexity of the oceanic circulation when compared with other records from the region. During early deglaciation a collapse of ice sheets surrounding the Nordic Seas released large amounts of freshwater that affected both the surface and bottom water circulation and significantly contributed to Heinrich stadial 1. During the Younger Dryas, the central Nordic Seas were affected by a last major freshwater plume which probably originated from the Arctic Ocean. When major ice rafting had ceased around 11ka subsurface temperatures started to rise. However, Atlantic Water advection and subsurface temperatures reached their maximum in the central Nordic Seas later than along the eastern continental margin. That spatio-temporal offset is explained by a gradual re-routing and westward expansion of the Atlantic Water flow during times when the Greenland Sea gyre system became more steadily established. In the Greenland Basin, the Holocene thermal maximum ended c. 5.5ka, and time-coeveal with an increase in sea-ice export from the Arctic. In the Lofoten Basin the cooling occurred later, after 4ka, and together with a weakening of the overturning processes. The Neoglacial cooling was reached c. 3ka, together with low solar irradiance, expanding sea ice and a slight decrease in deep convection. At c. 2ka subsurface temperatures began to rise again due to an increasing influence of Atlantic Waters.

Document Type: Article
Additional Information: WOS:000357439900008
Keywords: Deglaciation; Holocene; Ice-rafted debris; Nordic Seas; Paleoceanography; Planktic foraminifera; Stable isotopes
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/j.quascirev.2015.05.013
ISSN: 0277-3791
Projects: Laptev Sea System, Transdrift, CASE ITN
Date Deposited: 24 Feb 2015 10:54
Last Modified: 12 Apr 2017 09:25
URI: http://oceanrep.geomar.de/id/eprint/27647

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...