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Record W73868712

Gravity signatures of gas hydrate

2003· article· en· W73868712 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

aboutThe title or abstract carries a Canadian signal from the geographic lexicon.
no affNo Canadian affiliation: this work is invisible to an affiliation-only frame.
No Canadian affiliation. An affiliation-only frame, the usual design, would never have seen this work. It is one of the works that make the case for inverting the frame.

Bibliographic record

VenueCurrent Science · 2003
Typearticle
Languageen
FieldEnvironmental Science
TopicMethane Hydrates and Related Phenomena
Canadian institutionsnot available
Fundersnot available
KeywordsFree-air gravity anomalySeafloor spreadingGravimeterGeologyGravity anomalyClathrate hydrateBouguer anomalyAnomaly (physics)GeophysicsGravitationGravity currentGeodesyHydratePhysicsPaleontologyInternal waveOceanographyChemistry
DOInot available

Abstract

fetched live from OpenAlex

In the present study we have performed two-dimensional gravity modelling to evaluate the gravity anomaly generated by hydrate distribution. By varying the thickness of gas hydrate-bearing layer, gravity values were estimated at the seafloor and different levels in the water column. Density estimates for free gas-bearing layers are not readily available in the literature. Hence an approximate density value representing free-gas has been incorporated to model for gas below the hydrates. The results indicate that this density configuration produces a small-magnitude gravity anomaly, which can be detected at the seafloor. The gravity response for gas-hydrate configurations of Blake Ridge and Vancouver Islands is observable only at the seafloor and falls sharply away from the source. As such, gravity observations at the sea surface are devoid of gravity anomalies in these regions. The gravity anomaly falls sharply and vanishes, if the observations are taken 1000 m above the seafloor. In view of this, it is concluded that the ship-borne and satellite gravity observations are devoid of gravity anomaly signature from gas hydrate-bearing layers. Future endeavours with deep-towed, high-resolution gravimeters may prove the utility of gravity studies for gas hydrate exploration. The high resolution data acquired from these observations have to be processed applying proper terrain correction and using techniques such as pattern recognition to separate relevant signal from noise due to small-scale gravity perturbation.

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.

Full frame distilled prediction

Teacher imitation

Not 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.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesInsufficient payload (model declined to judge)
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: Bench or experimental
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.141
Threshold uncertainty score1.000

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0010.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.001
Science and technology studies0.0000.001
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0010.000

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.

Opus teacher head0.015
GPT teacher head0.260
Teacher spread0.245 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it