The Middle Eocene Climatic Optimum (MECO) in the high latitudes of the North Atlantic: Temperature and Biotic change
Bibliographic record
Abstract
Increasingly high resolution isotope- and novel organic geochemical proxy records have revealed that \nthe long-term cooling trend of the middle Eocene was interrupted by a warming phase designated the \nMiddle Eocene Climatic Optimum (MECO). It is suggested to represent an increase in sea surface \ntemperatures of about 4°C, lasting approximately 400 kyr. The temperature evolution of the MECO is \nnotably well-documented in the Southern Ocean. However, records of temperature- and biotic change \nduring the MECO are largely missing from the higher northern latitudes. Here we document on the sea \nsurface temperature evolution during the MECO reconstructed using TEX86 from Ocean Drilling Program \n(ODP) site 647 situated in the Labrador Sea. In addition, organic walled remains of dinoflagellates (i.e. \ndinocysts) were investigated in order to identify environmental change in response to the MECO
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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 | 0.001 |
| 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".