Effects of nonlinear rheology on degree 2 harmonic deformation in a spherical self‐gravitating earth
Bibliographic record
Abstract
The effect of non‐linear rheology on surface displacements, gravitational potential perturbation and ∂tJ2 (or J2‐dot) for a self‐gravitating spherical earth is studied using a finite element code coupled to Poisson's equation. Four earth models investigated are: a model with uniform linear rheology throughout the mantle and three others containing nonlinear rheology in the whole mantle, upper mantle and lower mantle respectively. The effect of self‐gravitation is shown to be non‐negligible. The effects of nonlinear rheology in different parts of the mantle on surface displacements and potential have also been shown to be large. ∂tJ2 due to cyclic glaciation of the Laurentian, Fennoscandian, Barents Sea and Antarctic ice sheets over realistic oceans is also computed for all four rheology models. The model with nonlinear lower mantle cannot be ruled out by the observed data.
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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 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.001 | 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".