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Climate of the Past An interactive open-access journal of the European Geosciences Union
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Volume 10, issue 1 | Copyright

Special issue: The changing Arctic and Subarctic environment: proxy- and...

Clim. Past, 10, 51-62, 2014
https://doi.org/10.5194/cp-10-51-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 10 Jan 2014

Research article | 10 Jan 2014

Reconstruction of Atlantic water variability during the Holocene in the western Barents Sea

D. E. Groot, S. Aagaard-Sørensen, and K. Husum D. E. Groot et al.
  • Department of Geology, University of Tromsø, Tromsø, Norway

Abstract. The gravity core JM09-KA11-GC from 345 m water depth on the western Barents Sea margin was investigated for down-core distribution patterns of benthic Foraminifera, stable isotopes, and sedimentological parameters in order to reconstruct the flow of Atlantic water during the Holocene. The core site is located below the Atlantic water masses flowing into the Arctic Ocean and close to the Arctic front. The results show continuous presence of Atlantic water at the margin throughout the Holocene. During the early Holocene, (11 500–9800 cal yr BP), bottom water temperatures as calculated by transfer functions rose by 1.5 °C, likely due to the increased inflow of Atlantic water, although sea ice was still present at this time. The transition to the mid-Holocene is characterized by a local shift in current regime, resulting in a ceased supply of fine-grained material to the core location. Throughout the mid-Holocene the δ18O values indicate a slight cooling, thereby following changes in insolation. In the last 1500 yr, inflow of Atlantic water increased but was interrupted by periods of increased influence of Arctic water causing periodically colder and more unstable conditions.

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