Breakup of last glacial deep stratification in the South Pacific

CO 2 escaped from the deep Why did the concentration of atmospheric carbon dioxide rise so much and so quickly during the last deglaciation? Evidence has begun to accumulate suggesting that old, carbon-rich water accumulated at depth in the Southern Ocean, which then released its charge when Souther...

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Bibliographic Details
Published in:Science
Main Authors: Basak, Chandranath, Fröllje, Henning, Lamy, Frank, Gersonde, Rainer, Benz, Verena, Anderson, Robert F., Molina-Kescher, Mario, Pahnke, Katharina
Other Authors: National Science Foundation, Max Planck Institute for Marine Microbiology, Institute for Chemistry and Biology of the Marine Environment, University of Oldenburg
Format: Article in Journal/Newspaper
Language:English
Published: American Association for the Advancement of Science (AAAS) 2018
Subjects:
Multidisciplinary
North Atlantic
Southern Ocean
Online Access:http://dx.doi.org/10.1126/science.aao2473
https://syndication.highwire.org/content/doi/10.1126/science.aao2473
https://www.science.org/doi/pdf/10.1126/science.aao2473
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Summary:CO 2 escaped from the deep Why did the concentration of atmospheric carbon dioxide rise so much and so quickly during the last deglaciation? Evidence has begun to accumulate suggesting that old, carbon-rich water accumulated at depth in the Southern Ocean, which then released its charge when Southern Ocean stratification broke down as the climate there warmed. Basak et al. present measurements of neodymium isotopes that clearly show that the deepwater column of the glacial southern South Pacific was stratified, just as would be necessary for the accumulation of old, carbon-rich water. Their data also show that North Atlantic processes were not the dominant control on Southern Ocean water-mass structure during that interval, as has been thought. Science , this issue p. 900

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