Biogenic carbon pool production maintains the Southern Ocean carbon sink.

ABSTRACT: Through biological activity, marine dissolved inorganic carbon (DIC) is transformed into different types of biogenic carbon available for export to the ocean interior, including particulate organic carbon (POC), dissolved organic carbon (DOC), and particulate inorganic carbon (PIC). Each biogenic carbon pool has a different export efficiency that impacts the vertical ocean carbon gradient and drives natural air-sea carbon dioxide gas (CO₂) exchange. In the Southern Ocean (SO), which presently accounts for ~40% of the anthropogenic ocean carbon sink, it is unclear how the production of each biogenic carbon pool contributes to the contemporary air-sea CO₂ exchange. Based on 107 independent observations of the seasonal cycle from 63 biogeochemical profiling floats, we pr

SUBMITTER: Huang Y 

PROVIDER: S-EPMC10160987 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature