Persistent Shelf‐to‐Basin Export of Bioavailable Dissolved Organic Carbon in the Arctic Ocean
Abstract
Abstract Microbial carbon demand often exceeds local primary production in the oligotrophic central Arctic Ocean. Whether shelf‐derived dissolved organic carbon (DOC) provides a persistent carbon subsidy to reconcile this imbalance remains unclear. Here, we combine amino acid‐based molecular tracers and hydrographic analyses to trace the transport and transformation of bioavailable DOC from the Beaufort shelf into the Canada Basin. Semi‐labile DOC dominated the upper 200 m (15–36 μmol L −1 ), whereas labile DOC was scarce (
Fields of Study & Subjects
Marine and coastal ecosystems
Arctic and Antarctic ice dynamics
Oceanographic and Atmospheric Processes
Publication details
- Journal / source
- Geophysical Research Letters
- Publisher
- American Geophysical Union (AGU)
- Volume
- 53
- Issue
- 16
- Publication date
- 17 August 2026
- Language
- EN