Neodymium isotope data from South Pacific sediment cores

Stratification of the deep Southern Ocean during the Last Glacial Maximum is thought to have facilitated carbon storage and subsequent release during the deglaciation as stratification broke down, contributing to atmospheric CO2 rise. Here, we present neodymium isotope evidence from deep to abyssal...

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Bibliographic Details
Main Authors: Basak, Chandranath, Fröllje, Henning, Lamy, Frank, Gersonde, Rainer, Benz, Verena, Anderson, Robert F, Molina-Kescher, Mario, Pahnke, Katharina
Format: Dataset
Language:English
Published: PANGAEA 2016
Subjects:
AWI_Paleo
Paleoenvironmental Reconstructions from Marine Sediments @ AWI
Southern Ocean
Ross Sea
Pacific
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.858969
https://doi.org/10.1594/PANGAEA.858969
Description
Summary:Stratification of the deep Southern Ocean during the Last Glacial Maximum is thought to have facilitated carbon storage and subsequent release during the deglaciation as stratification broke down, contributing to atmospheric CO2 rise. Here, we present neodymium isotope evidence from deep to abyssal waters in the South Pacific that confirms stratification of the deepwater column during the Last Glacial Maximum. The results indicate a glacial northward expansion of Ross Sea Bottom Water and a Southern Hemisphere climate trigger for the deglacial breakup of deep stratification. It highlights the important role of abyssal waters in sustaining a deep glacial carbon reservoir and Southern Hemisphere climate change as a prerequisite for the destabilization of the water column and hence the deglacial release of sequestered CO2 through upwelling.

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