Transient hydrodynamic effects influence organic carbon signatures in marine sediments.

ABSTRACT: Ocean dynamics served an important role during past dramatic climate changes via impacts on deep-ocean carbon storage. Such changes are recorded in sedimentary proxies of hydrographic change on continental margins, which lie at the ocean-atmosphere-earth interface. However, interpretations of these records are challenging, given complex interplays among processes delivering particulate material to and from ocean margins. Here we report radiocarbon (¹⁴C) signatures measured for organic carbon in differing grain-size sediment fractions and foraminifera in a sediment core retrieved from the southwest Iberian margin, spanning the last ~25,000 yr. Variable differences of 0-5000 yr in radiocarbon age are apparent between organic carbon in differing grain-sizes and foraminifera of the

SUBMITTER: Magill CR 

PROVIDER: S-EPMC6224525 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature