Paleo-bathymetry of the Davis Strait, a polar gateway between Canada and Greenland
Bibliographic record
Abstract
The Baffin Bay and the Labrador Sea are connected via the Davis Strait. As a bathymetric high of less than 700 m water depth, the Davis Strait is an obstacle for the water transport between the northern latitudes and the Atlantic Ocean. For climate models of the past, the heat transport by ocean currents plays a major role. Bathymetric models are therefore essential to understand past ocean-current developments. \nBy backstripping of the sediments, calculation of thermal subsidence of the crust, and rotation in a plate kinematic model we obtained the paleo-bathymetry of the Davis Strait area, including the northern Labrador Sea. The grids are calculated for time steps from Eocene to Cretaceous. For these calculations we collected interpretations of seismic data and drill sites to combine these with our new seismic data. The backstripping process includes flexual unloading (isostatic compensation), sediment decompaction, and global sea-level changes. The paleo-location of the profiles and the age structure of the crust, which is needed for the thermal subsidence calculations, are derived from our recent plate kinematic model. \nAlthough the paleo-bathymetry grids include large uncertainties, we can conclude that a water transfer via the polar gateway Davis Strait was not possible prior to Oligocene times. Our grids represent the first regional paleo- bathymetry models of the Davis Strait/Labrador Sea region. Combined with previous work in the North Atlantic they can be used for paleo-climate simulations.
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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 | 0.002 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.012 | 0.001 |
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".