Southern Ocean contribution to both steps in deglacial atmospheric CO₂ rise.

ABSTRACT: The transfer of vast amounts of carbon from a deep oceanic reservoir to the atmosphere is considered to be a dominant driver of the deglacial rise in atmospheric CO₂. Paleoceanographic reconstructions reveal evidence for the existence of CO₂-rich waters in the mid to deep Southern Ocean. These water masses ventilate to the atmosphere south of the Polar Front, releasing CO₂ prior to the formation and subduction of intermediate-waters. Changes in the amount of CO₂ in the sea water directly affect the oceanic carbon chemistry system. Here we present B/Ca ratios, a proxy for delta carbonate ion concentrations Δ[CO₃^2-], and stable isotopes (δ¹³C) from benthic foraminifera from a sediment core bathed in Antarctic Interm

SUBMITTER: Ronge TA 

PROVIDER: S-EPMC8585946 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature