Emissions of methyl chloroform (CH3CCI3) from biomass burning and the tropospheric methyl chloroform budget
Bibliographic record
Abstract
The only known sources of atmospheric methyl chloroform are industrial production and biomass burning.With the phase-out of industrial methyl chloroform production the atmospheric burden of methyl chloroform is rapidly declining.Consequently the potential importance of nonindustrial sources is increasing.Up to now only one experimental investigation of methyl chloroform emissions from biomass burning has been published.Here laboratory studies of methyl chloroform emission from wood burning are presented.The emission ratios relative to carbon dioxide and carbon monoxide are 12.7 4-2.6 x 104 and 15.6 4-3.3 x 10 -7, respectively.Although based on a limited number of measurements, they strongly suggest that methyl chloroform emissions from biomass burning are at the lower end of previous estimates.The impact of these emissions on the chemistry of the atmosphere will be marginal.However, reliable knowledge of the biomass burning source strength will be essential for a detailed analysis of the trend of atmospheric methyl chloroform concentrations.
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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 | 0.000 |
| 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 | 0.001 |
| 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".