Oxygenation of the Denmark Strait Overflow Water as revealed by BGC-Argo floats in the Irminger Basin
Bibliographic record
Abstract
<!--!introduction!--> Located between Greenland and Iceland, the Denmark Strait is a key gateway for the transport of dense waters formed in the Nordic Seas to the Subpolar North Atlantic. There, the Denmark Strait Overflow Water (DSOW) spills over the shallow sill of the Strait into the Irminger Basin, feeding the lower limb of the Atlantic Meridional Overturning Circulation (AMOC). DSOW has high oxygen content, reflecting its recent ventilation by buoyancy loss in the Nordic Seas. As it spills over the sill and spreads southward, DSOW is thought to entrain Arctic-origin, Atlantic-origin, and Labrador Sea Waters (LSW). However, the proportions of water masses that become entrained into the overflow plume further downstream in the Irminger Basin and their variability over seasonal and interannual timescales remain unclear. Additionally, oxygen variability in DSOW and its relationship with oxygen content of the LSW in the Irminger Basin is poorly understood. Here we use data from BGC-Argo floats and an optimum multiparameter (OMP) framework for water-mass decomposition to address the question: How does the oxygen content of DSOW vary in the Irminger Basin and how is this observed variability connected to changes in the relative contributions of water masses (e.g., LSW, Atlantic-origin Water) that become entrained in the overflow plume? This study will have broad implications for assessing the role of overflow waters in the oxygenation of the North Atlantic Basin.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".