Sedimentary record of disintegrating ice shelves in a warming climate, Antarctic Peninsula
Bibliographic record
Abstract
Seafloor sediments from beneath the former Larsen‐A and Prince Gustav ice shelves document the recent breakup of the shelves and provide evidence for interpretation of previous events. At three of five sites, sediment texture coarsens upward with up to 40% sand at the surface. Radiometric 210 Pb dating shows this to have occurred between 1985 and 1993, several years before breakup of the shelf, and that rates of accumulation of sediment on the seafloor doubled to quadrupled during this period. These events are related to the release of eolian sediment in periodic rapid draining of small lakes and crevasses on the ice shelf before breakup. X‐ray radiographs of sediment cores also document the recent influx of coarse particles (gravel) related to ice rafting during ice shelf disintegration. Because sediment is released irregularly in time and space from well‐separated point sources on the ice shelf during at least several years before final disintegration, only a portion of the seafloor is affected.
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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".