Seasonal decay of first-year sea ice: field measurements
Bibliographic record
Abstract
This report describes the field program undertaken from 21 May to 19 July 2000 to measure the parameters that best characterize the ice decay process. During the field program, thickness of the first-year sea ice decreased from 1.55 m to 0.80 m, at which point the ice was virtually isothermal. The ice freeboard decreased from 60 mm in late May to a negative freeboard (melt ponding) in late July. Desalination was first observed in the surface layer of ice and eventually occurred in the bulk layer of ice, as indicated by the bulk salinity of 5 � in late May and 0.5 � in late July. More than one hundred borehole jack tests were conducted over the sampling period at depths 0.3, 0.6, 0.9 and 1.2 m. The average decrease in ice strength for the four depths was 8.7 MPa over the sampling period, most of which occurred between 4 June and 1 July. The surface layer of ice showed the largest decrease in strength over the sampling period (14.1 MPa to 2.1 MPa). Ice at a depth of 0.90 m had the least amount of change in strength (10.5 MPa to 3.7 MPa). In late July the bulk strength of the ice was only about 27% of what it was in late May.
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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 | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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".