Late Quaternary sea‐surface conditions at DSDP Hole 594 in the southwest Pacific Ocean based on dinoflagellate cyst assemblages
Bibliographic record
Abstract
Abstract Investigation of organic‐walled dinoflagellate cyst distribution in 118 surface sediments from the Southern Ocean documents the relatively high diversity of cyst taxa (46 species) and distinct cyst assemblages in relation to surface water masses and temperature gradient. The Antarctic Water is characterised by the dominance of Selenopemphix antarctica accompanied by Brigantedinium spp. and Impagidinium pallidum. The Subantarctic Water association consists mainly of Nematosphaeropsis labyrinthus, Impagidinium paradoxum and Impagidinium sphaericum, whereas the Subtropical Water association is dominated by Operculodinium centrocarpum and Spiniferites membranaceus. Multivariate analyses (non‐metric multidimensional scaling) demonstrate the relationships with sea‐surface conditions and enable the application of the best analogue method on the Southern Ocean dinoflagellate cyst data base for reconstructing past sea‐surface conditions. The dinoflagellate cyst record from DSDP 594 (45°31.41'S, 174°56.88'E; 1204 m, southern margin of the Chatham Rise) shows important fluctuations in species composition from glacial to interglacial over the last 140 000 yr. Reconstruction of winter and summer SSTs reveals much lower temperature than present by 6 to 10 °C during marine oxygen isotope stages 6, 4 and 2, and higher temperature by 2–3 °C during substage 5e. Copyright © 2001 John Wiley & Sons, Ltd.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 |
| Science and technology studies | 0.001 | 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".