Capturing the global signature of surface ocean acidification during the Palaeocene-Eocene Thermal Maximum.

ABSTRACT: Geologically abrupt carbon perturbations such as the Palaeocene-Eocene Thermal Maximum (PETM, approx. 56 Ma) are the closest geological points of comparison to current anthropogenic carbon emissions. Associated with the rapid carbon release during this event are profound environmental changes in the oceans including warming, deoxygenation and acidification. To evaluate the global extent of surface ocean acidification during the PETM, we present a compilation of new and published surface ocean carbonate chemistry and pH reconstructions from various palaeoceanographic settings. We use boron to calcium ratios (B/Ca) and boron isotopes (δ¹¹B) in surface- and thermocline-dwelling planktonic foraminifera to reconstruct ocean carbonate chemistry and pH. Our records exhibit a B/Ca reduc

SUBMITTER: Babila TL 

PROVIDER: S-EPMC6127385 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature