Revealing the submesoscale structure of subthermocline eddies in the North East Pacific
Bibliographic record
Abstract
The california undercurrent in the Northeast Pacific interacts with the shelf break creating instabilities associated with the generation of sub surface eddies called Cuddies. These subthermocline eddies are key agents in offshore transport of heat, salt, oxygen and nutrients, yet their limited surface expression has historically hindered their detection via traditional satellite altimetry. In this study, we investigate the vertical and horizontal structure of a Cuddy, using underwater glider observations and satellite data, including the high-resolution Surface Water and Ocean Topography (SWOT) mission. Glider transects reveal a subsurface-intensified lens at ~250 m depth, characterized by warm and salty Pacific Equatorial Waters. SWOT captures the eddy with greater intensity and finer-scale structure than conventional altimetry (DUACS), resolving submesoscale features and spiral-shaped internal jets not seen in DUACS. In addition, SWOT-derived geostrophic velocities were compared with surface velocities inferred from satellite chlorophyll imagery showing high correlation (R2 = 0.78). These results highlight SWOT’s unique capability to detect the submesoscale surface imprint of subsurface eddies, enhancing our understanding of eastern boundary current dynamics and cross-shelf exchange
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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 | 0.000 | 0.000 |
| 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) | 0.000 | 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 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".