Chemical and biological oceanographic conditions on the Scotian Shelf and in the Eastern Gulf of Maine during 2024
Bibliographic record
Abstract
Nutrient and plankton conditions were assessed in the context of physical conditions observed in the Maritimes Region in 2024. Nutrient depletion was widespread across the region, with Prince 5 (P5) station recording its tenth consecutive year of below-normal surface and subsurface nitrate inventories, while Cabot Strait section recorded record-low inventories for surface nitrate, silicate, and phosphate. Lower nutrient conditions likely influenced phytoplankton productivity, as chlorophyll-a measured in situ or derived from satellite remote sensing was mainly near or below normal across the region. The spring phytoplankton bloom was earlier than normal in the eastern area, near normal in the central area, and later than normal in the western area of the region. The intensity of the spring bloom was mainly normal to slightly below normal regionwide (except for Lurcher Shoal). The onset of the fall phytoplankton bloom was delayed across most areas, with the Eastern Scotian Shelf indicating a record-late onset. The intensity of the fall bloom was variable but mainly within near-normal ranges. Calanus finmarchicus abundance was near normal for the core sections, but negative and positive anomalies were recorded at the Halifax-2 (HL2) and P5 stations, respectively. Pseudocalanus spp. abundance reached record-high levels for the Halifax section, but was otherwise near normal. Mesozooplankton biomass was above normal at P5 but mainly below normal elsewhere, with record-low biomass observed at HL2. Arctic Calanus species and warm-water offshore copepods mainly remained at or below normal abundances, while warm-water shelf copepods showed near-normal abundances except for negative anomalies observed for the Halifax section and at P5.
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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".