Benthic foraminifera in the marginal Arctic Ocean ...

• Main Authors: Wollenburg, Jutta Erika, Knies, Jochen, Mackensen, Andreas
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2004
• Subjects: Giant box corer; MiniCorer; Gravity corer Kiel type; MultiCorer; Kasten corer; Multiple opening/closing net; ARK-VIII/2; ARK-VIII/3; ARK-IX/4; ARK-XIII/2; Polarstern; Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Arctic; Arctic Ocean; Barents Sea; Yermak Plateau; Foraminifera*; Ice Sheet; Planktonic foraminifera; Yermak plateau
• Online Access: https://dx.doi.org/10.1594/pangaea.728235; https://doi.pangaea.de/10.1594/PANGAEA.728235

Analyses of benthic foraminifera in sediment cores taken at about 1000 m water depth at the Yermak Plateau and the Barents Sea slope, adjacent to the position of the ice-sheet edge during the Last Glacial Maximum, show that paleoproductivity was reduced to about a third of its present level during peak glacial stadials. These reduced values are still higher than values for modern, permanently ice-covered regions, suggesting that the core locations were at least partially ice-free even during stadials. Paleoproductivity at the core locations was higher than or equal to that of today during initial deglaciations and warm substages. Peak paleoproductivity occurred in samples with low-salinity surface waters as indicated by oxygen isotope values of planktonic foraminifera, and slightly after increased abundance of 'Atlantic species', suggesting that enhanced advection of warmer waters from the Atlantic supported the initial ice-sheet retreat. During the Holocene Climatic Optimum productivity was much less than ... : Age determination of sediment core PS2138-1: doi:10.1594/PANGAEA.66865; Age determination of sediment core PS2837-5: doi:10.1594/PANGAEA.66867 ...