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Deep-sea corals reveal secrets of rapid carbon dioxide increase as the last ice age ended

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Deep-sea corals reveal secrets of rapid carbon dioxide increase as the last ice age ended

Researchers examined deep-sea coral fossils – species Desmophyllum dianthus – to study carbon sequestration in the Southern Ocean 20,000 to 10,000 years ago. The chemical signatures of nitrogen and carbon in the coral fossils revealed that ocean carbon sequestration decreased as phytoplankton failed to devour macronutrients supplied by upwelling currents in the Southern Ocean and trap carbon dioxide in the deep ocean. Credit: Tony Wang, Boston College The Southern Ocean played a critical role in the rapid atmospheric carbon dioxide increase during the last deglaciation that took place 20,000 to 10,000 years ago, according to a new report by […]

read more here —> phys.org