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Short-term Antarctic ice-sheet dynamics during the late Oligocene

Palaeoceanographic records spanning the Oligocene provide insights into Antarctic ice-sheet dynamics in a world warmer-than-today, allowing us to improve future climate projections linked to global warming. Here, we present a high-resolution multi-proxy record from ODP Site 689 (Maud Rise, Southern...

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Main Authors: Creac'h, Layla (Author) , Brzelinski, Swaantje (Author) , Lippold, Jörg (Author) , Gutjahr, Marcus (Author) , Frank, Martin (Author) , Fischer, Alexa (Author) , Friedrich, Oliver (Author)
Format: Article (Journal)
Language:English
Published: 22 January 2026
In: Communications earth & environment
Year: 2026, Volume: 7, Pages: 1-12
ISSN:2662-4435
DOI:10.1038/s43247-026-03217-4
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1038/s43247-026-03217-4
Verlag, kostenfrei, Volltext: https://www.nature.com/articles/s43247-026-03217-4
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Author Notes:Layla Creac’h, Swaantje Brzelinski, Jörg Lippold, Marcus Gutjahr, Martin Frank, Alexa Fischer & Oliver Friedrich
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Summary:Palaeoceanographic records spanning the Oligocene provide insights into Antarctic ice-sheet dynamics in a world warmer-than-today, allowing us to improve future climate projections linked to global warming. Here, we present a high-resolution multi-proxy record from ODP Site 689 (Maud Rise, Southern Ocean), to investigate the short-term Antarctic ice-sheet variability during the late Oligocene. Our oxygen isotope composition of sea water record reflects large, obliquity-paced ice volume fluctuations from 26.2 to 25.2 Ma. These fluctuations would have resulted in changes in the types of rocks eroded as the Antarctic ice-sheet advanced/retreated. Indeed, the radiogenic isotopic compositions of neodymium and lead co-vary with the oxygen isotopes for most of the record and identify changes in sediment provenance and weathering rates linked to advances and retreats of the Antarctic ice-sheet. At the same time, the stable incongruent lead isotope signal observed confirms the presence of a major East Antarctic ice-sheet during the late Oligocene.
Item Description:Veröffentlicht: 22. Januar 2026
Gesehen am 20.03.2026
Physical Description:Online Resource
ISSN:2662-4435
DOI:10.1038/s43247-026-03217-4

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