Bibliographic record
Abstract
Methyl bromide in the atmosphere—a scientific overview and update Summary: Although natural sources and sinks of methyl bromide are abundant and diverse, a portion of industrially-produced methyl bromide reaches the stratosphere and catalyzes ozone depletion. Because of this, production of this chemical was restricted by the Montreal Protocol on Substances that Deplete the Ozone Layer. Here we update our understanding of the atmospheric science of stratospheric ozone and methyl bromide, and show how reductions in methyl bromide production have affected the atmosphere and its composition. The talk will be based primarily on the most recent World Meteorological Organization Scientific Assessment of Ozone Depletion, published in 2011. This recent report re-confirms the significant contribution of methyl bromide to ozone depleting halogen in the stratosphere and the significant benefits to stratospheric ozone that have been realized from reduced emissions. Significant declines in ozone-depleting halogen concentrations have been observed in the atmosphere, and the decrease in atmospheric methyl bromide has accounted for an important fraction of this overall decline. Ozone
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.
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 | 0.001 | 0.003 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.002 | 0.002 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.003 | 0.003 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.002 | 0.001 |
| Insufficient payload (model declined to judge) | 0.265 | 0.187 |
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".