Hydrographic Variability on the Scotian Shelf During the 1990s1 by
Bibliographic record
Abstract
The temperature, salinity and nutrient conditions of the waters on the Scotian Shelf during the 1990s are described and compared to the long-term variability. Three major features are highlighted. First is the presence of cold subsurface waters throughout much of the decade in the northwest and nearshore regions of the Shelf. These cold conditions, initially established in the mid-1980s, were also observed off southern Newfoundland and in the Gulf of St. Lawrence. The temperature trends on the Scotian Shelf are believed to have resulted from downstream advection with some contribution from in situ cooling. Second was the arrival in 1997-98 of cold Labrador Slope water along the shelf break, which subsequently flooded onto the Scotian Shelf. This produced the coldest near-bottom conditions on the central and southwestern shelf in the past 30 years but was of short duration, lasting only for approximately a year. Major changes in the dissolved oxygen and nutrient concentrations accompanied the Labrador Slope water intrusion; oxygen levels increased while nutrients decreased. These changes were consistent with a longer-term event in the mid-1960s. Finally, the changes in the near surface waters are described. Of particular importance was the increase in near-surface vertical stratification due primarily to the presence of low salinity waters at the surface. The impact of these ocean climate changes on the Shelf fisheries is also briefly discussed.
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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 | 0.000 | 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".