A 430 kyr record of ice-sheet dynamics and organic-carbon burial in the central Eurasian Arctic Ocean

Ruediger Stein (), Thomas Frederichs, Kirsten Fahl, Walter Geibert, Jens Matthiessen, Frank Niessen, Christoph Vogt, Cynthia Sassenroth and Evgenia Bazhenova
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Ruediger Stein: University of Bremen
Thomas Frederichs: University of Bremen
Kirsten Fahl: Alfred Wegener Institute (AWI) Helmholtz Centre for Polar and Marine Research
Walter Geibert: Alfred Wegener Institute (AWI) Helmholtz Centre for Polar and Marine Research
Jens Matthiessen: Alfred Wegener Institute (AWI) Helmholtz Centre for Polar and Marine Research
Frank Niessen: Alfred Wegener Institute (AWI) Helmholtz Centre for Polar and Marine Research
Christoph Vogt: University of Bremen
Cynthia Sassenroth: Alfred Wegener Institute (AWI) Helmholtz Centre for Polar and Marine Research
Evgenia Bazhenova: University of Bremen

Nature Communications, 2025, vol. 16, issue 1, 1-17

Abstract: Abstract Late Quaternary central Arctic Ocean paleoclimatic records going beyond the last climate cycle, are still very rare. Here, we present data from a well-dated deep-sea sediment core that allow for the first time to reconstruct in detail the interrelationship between ice-sheet dynamics and organic-carbon (OC) burial in the Eurasian Basin during the last 430 kyr, and to correlate marine and terrestrial records of the Eurasian Ice Sheet (EIS) history. Using a multi-proxy approach, we demonstrate that within pulses of EIS advance and retreat during glacial to subsequent deglacial times, erosion of ancient (petrogenic) OC-rich sedimentary rocks and soils deliver sediments, further supplied onto the shelf and beyond. Down-slope and long-distance transport of the fine-grained OC-rich suspension by turbidity and contour currents cause elevated burial of terrestrial OC and anoxic sedimentary conditions in the deep Eurasian Basin that allow preservation of labile algae-type OC.

Date: 2025
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DOI: 10.1038/s41467-025-59112-7

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