Bibliographic record
Abstract
In this study, 14C age dating of biogenic carbonates in high-deposition-rate marine sediment cores from the Pacific Ocean is used to establish the relative phasing of low and high latitude ocean warming at the beginning of the last glacial termination. The results indicate the Southern Ocean began to warm as much as 1000 years before deglacial warming began in the western tropical Pacific Warm Pool region. Importantly, it appears that much of the deep Pacific warming occurred between 19 and 14 ky BP, prior to the major deglaciation of the northern hemisphere ice sheets. These results further indicate that d18O stratigraphies from deep sea carbonates are not synchronous throughout the oceans over a glacial/interglacial termination and. therefore, d18O stratigraphies are not precise enough to establish temporal phase relationships. SOMMAIRE Dans la presente etude, on a utilise la datation par 14C de carbonates biogeniques, sur des carottes de sediments marins de milieux a forts taux de sedimentation du Pacifique, dans le but de quantifier la progression relative du rechauffement a basse et a haute latitude, a partir de la fin de la derniere glaciation. Les resultats indiquent que le sud de l’ocean a commence a se rechauffer jusqu’a 1 000 ans avant que le rechauffement de deglaciation ne debute dans la portion ouest tropicale du Bassin d’eau chaude du Pacifique. On notera qu’il semble qu’une grande portion du rechauffement des couches profondes du Pacifique se soit produite entre 19 ka et 14 ka avant le present, soit avant le gros de la deglaciation des calottes glaciaires. Les resultats montrent aussi que les stratigraphies etablies par δ18O sur les carbonates des fonds marins ne sont pas synchrones au travers des fonds marins durant la periode glaciaire terminale et inter-glaciaire, ce qui indique que les stratigraphies etablies par δ18O ne sont pas assez precises pour permettre d’etablir des relations de phases temporelles.
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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 | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.003 | 0.008 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.004 | 0.002 |
| Open science | 0.001 | 0.003 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.084 | 0.041 |
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".