Numerical study of tidal circulation and nonlinear dynamics in Lunenburg Bay, Nova Scotia
Bibliographic record
Abstract
A three‐dimensional ocean circulation model is used to study the barotropic tidal circulation and nonlinear tidal dynamics in Lunenburg Bay, Nova Scotia. The model performance is first assessed using the observed bottom pressures and currents made in Septembers of 1991 and 2003. The model results reproduce reasonably well the observed tidal circulation in the study region. The simulated tidal circulation is dominated by the semidiurnal (M 2 ) tide and an intense jet‐like flow through a narrow channel connecting Lunenburg Bay and two shallow coves. To demonstrate the importance of nonlinear tidal dynamics in the region, the first two harmonics of M 2 (i.e., M 4 and M 6 ) are computed from the model results forced by the M 2 tide at the model open boundaries. Both M 4 and M 6 are relatively large in western Lunenburg Bay and vicinity, indicating the importance of the nonlinear tidal dynamics over these areas. To quantify the role of various nonlinear terms in generating the intense jet and associated residual flows in the region of the jet, both transient and tidally averaged (time mean) momentum equations are examined. The transient and time mean momentum balances demonstrate that the nonlinear interaction of the tidal currents with local bathymetry is balanced primarily by the horizontal pressure gradients, momentum advection, and dissipation. The Coriolis effect plays a minor role in the study region.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 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 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".