Details

Autor(en) / Beteiligte

• Basak, Chandranath
• Fröllje, Henning
• Lamy, Frank
• Gersonde, Rainer
• Benz, Verena
• Anderson, Robert F
• Molina-Kescher, Mario
• Pahnke, Katharina

Titel

Breakup of last glacial deep stratification in the South Pacific

Ist Teil von

• Science (American Association for the Advancement of Science), 2018-02, Vol.359 (6378), p.900-904

Ort / Verlag

United States: The American Association for the Advancement of Science

Erscheinungsjahr

2018

Quelle

American Association for the Advancement of Science

Beschreibungen/Notizen

• 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 CO 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 CO through upwelling.