A temporal trend in compliance measurements near a gas hydrate accumulation, Northern Cascadia
Bibliographic record
Abstract
Ocean gravity waves of typically kilometre scale, produce temporal pressure and correlated vertical displacements on the ocean floor. The experimental compliance is the ratio between the pressure and the resulting displacement. Pressures are measured by a differential pressure gauge (DPG), while a broadband seismometer measures velocities that are directly related to the displacements in frequency domain. These instruments are installed on NEPTUNE Canada's ocean floor network on the Cascadia margin. Here, gas hydrates occur and they have the property of stiffening marine sediment, i.e. reducing the compliance. A compliance measurement is dependent on the elastic parameters of the sediment, particularly the shear modulus. We computed compliance from raw data, daily, for 232 days and plotted the temporal variations in shear modulus of a region ~ 390 m North East of the undersea area known as Bullseye Vent. The compliance was determined over a bandwidth of 0.01 – 0.03 Hz, and has peak sensitivity to sediments between the ~200 and 400 mbsf, for water depth of 1250 m – determined by the gravity wave dispersion relation. We observed a linear decrease in compliance of ~1% between October, 2010 and May, 2011.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| 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) | 0.001 | 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".