The distribution of dissolved and total dissolvable aluminum in the Beaufort Sea and Canada Basin region of the Arctic Ocean
Bibliographic record
Abstract
Vertical profiles of the concentrations of dissolved Al [D‐Al] and total dissolvable Al [T‐Al] are reported from a transect extending from the continental shelf of the Beaufort Sea into the Canada Basin in the Arctic Ocean. Sampling was performed in late summer and early autumn 2007, a year of historically extensive sea‐ice melt. Vertical profiles of [D‐Al] displayed surface maxima (1–3 nmol kg−1), subsurface minima (<1 nmol kg−1) in the upper halocline layer (Upper HL; 50–200 m), and a general increase in concentration with depth to values of ∼5–10 nmol kg−1. Near surface maxima at this time were associated with relatively fresh surface waters (26–30) resulting from sea‐ice melt in the region. This observation supports sea ice with entrained sediments and surface deposition of aerosols as important mechanisms for the delivery of Al to surface waters of the Canada Basin. No correlation between D‐Al and silicic acid was observed and low D‐Al:Si ratios in waters >300 m depth suggest that Al is likely lost through particle scavenging in the interior of the Canada Basin. Concentrations of T‐Al show that particulate Al (>0.2 µm) is the dominant form of Al in the water column except at greater depths at the most offshore stations. Lateral transport of D‐Al and T‐Al off the shelf likely results from the offshore progression of cyclonic eddies spawned inshore, oscillating upwelling and downwelling favorable winds, and brine rejection during sea‐ice formation that can drive currents sufficiently energetic to resuspend shelf sediments.
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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 | 0.002 | 0.002 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| 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".