Late quaternary oceanographic conditions in the Western Bering Sea

The benthic and planktonic foraminiferal assemblages and the distribution of coarse grain-size factions were studied in the upper 4.5 m of the Core SO201-2-85KL (57A degrees 30.30' N, 170A degrees 24.79' E, water depth 968 m) retrieved from the Shirshov Ridge. This part of the core covers...

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Bibliographic Details
Published in:Oceanology
Main Authors: Ovsepyan, E. A., Ivanova, E. V., Max, L., Riethdorf, Jan-Rainer, Nürnberg, Dirk, Tiedemann, Ralf
Format: Article in Journal/Newspaper
Language:English
Published: Springer 2013
Subjects:
Bering Sea
Shirshov Ridge
Sea ice
Online Access:https://oceanrep.geomar.de/id/eprint/21344/
https://oceanrep.geomar.de/id/eprint/21344/1/10.1134_S0001437013020136.pdf
https://doi.org/10.1134/S0001437013020136
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Summary:The benthic and planktonic foraminiferal assemblages and the distribution of coarse grain-size factions were studied in the upper 4.5 m of the Core SO201-2-85KL (57A degrees 30.30' N, 170A degrees 24.79' E, water depth 968 m) retrieved from the Shirshov Ridge. This part of the core covers 7.5 to 50 kyr BP. The glacial period is established to be characterized by low surface water productivity, the wide distribution of sea ice and/or icebergs in this area, and a high oxygen concentration in the bottom layer. Enhanced productivity is inferred from the maximum abundance of planktonic foraminifers at the very beginning of the deglaciation. The late Bolling-Allerod interstadial and the early Holocene were marked by the further two-phase increase in the surface productivity and the weakened ventilation of the bottom water.

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