Repeated storage of respired carbon in the equatorial Pacific Ocean over the last three glacial cycles.

ABSTRACT: As the largest reservoir of carbon exchanging with the atmosphere on glacial-interglacial timescales, the deep ocean has been implicated as the likely location of carbon sequestration during Pleistocene glaciations. Despite strong theoretical underpinning for this expectation, radiocarbon data on watermass ventilation ages conflict, and proxy interpretations disagree about the depth, origin and even existence of the respired carbon pool. Because any change in the storage of respiratory carbon is accompanied by corresponding changes in dissolved oxygen concentrations, proxy data reflecting oxygenation are valuable in addressing these apparent inconsistencies. Here, we present a record of redox-sensitive uranium from the central equatorial Pacific Ocean to identify intervals associated with

SUBMITTER: Jacobel AW 

PROVIDER: S-EPMC5700088 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature