Late Eocene to early Oligocene oxygen and carbon isotope records and biogenic barium accumulation rates in Maud Rise, Kerguelen Plateau and Agulhas Ridge

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Dettagli Bibliografici
Autori principali:	Faria, Gabrielle R, Lazarus, David B, Renaudie, Johan, Stammeier, Jessica, Özen, Volkan, Struck, Ulrich
Natura:	Dataset Open Access
Lingua:	en
Pubblicazione:	PANGAEA 2025
Soggetti:	Agulhas Ridge; Barium (Ba); export productivity; Kerguelen Plateau; Maud Rise; Ocean Drilling Program; ODP; Southern Ocean; Stable carbon and oxygen isotopes
Accesso online:	Acceder al recurso
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author	Faria, Gabrielle R Lazarus, David B Renaudie, Johan Stammeier, Jessica Özen, Volkan Struck, Ulrich
author_facet	Faria, Gabrielle R Lazarus, David B Renaudie, Johan Stammeier, Jessica Özen, Volkan Struck, Ulrich
collection	Datos científicos de ciencias marinas y ambientales
contents	The late Eocene through early Oligocene (40-33 Ma) represents a transition from a warm-house to icehouse climate mode, with the expansion of Antarctic glaciation shortly after the Eocene/Oligocene (E/O) boundary. Identifying the driving mechanisms for this climatic event remains controversial and depends on a better understanding of how the different environmental changes correlate to each other. We investigate the spatial and temporal variation in export productivity based on biogenic Ba (bio-Ba) from different Ocean Drilling Program (ODP) Sites in the Southern Ocean focusing on possible mechanisms that controlled them as well as the correlation of export productivity changes to changes in the global carbon cycle. We document two significant Southern Ocean region high export productivity late-Eocene events (ca. 37 and 33.5 Ma). We propose that paleoceanographic changes that followed the Southern Ocean gateways opening, along with more variable increases in circulation driven by episodic growth and decay of the Antarctic ice sheet, drove enhanced Southern Ocean export production in the late Eocene through the early Oligocene.
format	Dataset Open Access
id	pangaea_https___doi_org_10_1594_PANGAEA_959619
institution	PANGAEA
language	en
publishDate	2025
publisher	PANGAEA
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spellingShingle	Late Eocene to early Oligocene oxygen and carbon isotope records and biogenic barium accumulation rates in Maud Rise, Kerguelen Plateau and Agulhas Ridge Faria, Gabrielle R Lazarus, David B Renaudie, Johan Stammeier, Jessica Özen, Volkan Struck, Ulrich Agulhas Ridge; Barium (Ba); export productivity; Kerguelen Plateau; Maud Rise; Ocean Drilling Program; ODP; Southern Ocean; Stable carbon and oxygen isotopes The late Eocene through early Oligocene (40-33 Ma) represents a transition from a warm-house to icehouse climate mode, with the expansion of Antarctic glaciation shortly after the Eocene/Oligocene (E/O) boundary. Identifying the driving mechanisms for this climatic event remains controversial and depends on a better understanding of how the different environmental changes correlate to each other. We investigate the spatial and temporal variation in export productivity based on biogenic Ba (bio-Ba) from different Ocean Drilling Program (ODP) Sites in the Southern Ocean focusing on possible mechanisms that controlled them as well as the correlation of export productivity changes to changes in the global carbon cycle. We document two significant Southern Ocean region high export productivity late-Eocene events (ca. 37 and 33.5 Ma). We propose that paleoceanographic changes that followed the Southern Ocean gateways opening, along with more variable increases in circulation driven by episodic growth and decay of the Antarctic ice sheet, drove enhanced Southern Ocean export production in the late Eocene through the early Oligocene.
title	Late Eocene to early Oligocene oxygen and carbon isotope records and biogenic barium accumulation rates in Maud Rise, Kerguelen Plateau and Agulhas Ridge
topic	Agulhas Ridge; Barium (Ba); export productivity; Kerguelen Plateau; Maud Rise; Ocean Drilling Program; ODP; Southern Ocean; Stable carbon and oxygen isotopes
url	https://doi.org/10.1594/PANGAEA.959619

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