A new 155-year record of Pb pollution from Devon ice cap, Canada
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.
Bibliographic record
Abstract
A ∼64-m long firn core from Devon Island (Canada) was used to investigate temporal trends of atmospheric lead pollution in the Canadian High Arctic. Lead concentration ([Pb]) in firn increased from 10 pg g -1 before the industrial revolution (1845-1880) to peak above 300 pg g -1 ca 1970. As in central Greenland cores, the Devon Island [Pb] profile generally follows 20 th century trends of leaded fuel consumption in the USA and Europe until 1970. However the post-1970 decline of [Pb] in the Devon core lags behind that measured in Greenland, which suggests that the Canadian High Artic presently receives atmospheric Pb from source(s) that contribute comparatively less to Pb deposition over Greenland. This additional Pb pollution probably reaches northern Canada via transpolar transport from Europe and/or Asia.
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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) | 0.002 | 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 it