Hydroclimate dynamics during the Plio-Pleistocene transition in the northwest Pacific realm
Bibliographic record
Abstract
The appraisal of sedimentary archives is key for predicting sea level changes and extreme weather event behavior under varying greenhouse gas levels. Here, we assess the hydroclimate variability of the northwest Pacific realm during the Pliocene-Pleistocene transition by using a continuous record of gamma-ray log data from two boreholes comprising shallow-marine strata in the Western Foreland Basin, Taiwan. The gamma-ray records provide a high temporally resolved stratigraphic record spanning from ∼3.15 to ∼1.95 million years ago. The comparison of the astronomically tuned gamma-ray logs to global sea-level and regional sea-surface temperature reconstructions highlights the impact of high- and low-latitude climate drivers on depositional cycles during the Plio-Pleistocene transition. During the late Pliocene, the interplay between the orbitally paced East Asian Summer Monsoon and tropical cyclones dominates the fluctuation in sediment supplied from Taiwan to our study sites. With the intensification of Northern Hemisphere glaciation from the late Pliocene through the early Pleistocene, sea-level changes were ruled by increasingly pronounced glacial-interglacial cycles, and the sedimentary record during this time interval is paced initially by obliquity and later by precession. This study reveals that shallow marine strata can record a more complex history of past hydroclimatie dynamics in the northwest Pacific than recorded in deep sea climate archives.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| 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 teacher head, 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".