New constraints of terrestrial and oceanic global gross primary productions from the triple oxygen isotopic composition of atmospheric CO₂ and O₂.

ABSTRACT: Representations of the changing global carbon cycle under climatic and environmental perturbations require highly detailed accounting of all atmosphere and biosphere exchange. These fluxes remain unsatisfactory, as a consequence of only having data with limited spatiotemporal coverage and precision, which restrict accurate assessments. Through the nature of intimate coupling of global carbon and oxygen cycles via O₂ and CO₂ and their unique triple oxygen isotope compositions in the biosphere and atmosphere, greater insight is available. We report analysis of their isotopic compositions with the widest geographical and temporal coverage (123 new measurements for CO₂) and constrain, on an annual basis, the global CO₂ recycling time (1.5 ± 0.2 year)

SUBMITTER: Liang MC 

PROVIDER: S-EPMC9905602 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature