A commentary of “Antarctic ozone layer is gradually recovering” in 10 remarkable discoveries from 2020 in Nature
Bibliographic record
Abstract
In the mid-1980s, scientists discovered a spring atmospheric ozone hole over Antarctica, revealing the threat of human-made ozone-depleting substances to the atmosphere. The Antarctic ozone hole located 10 to 20 km above sea level, also affects the circulation of the atmosphere in the southern hemisphere, which in turn affects the global climate. One of its most noticeable effects is that the westerly jet in summer begins to move to the poles. The westerly jet is a planetary-scale atmospheric circulation phenomenon; there are several jet zones on the Earth. The 1987 Montreal Protocol and its subsequent amendments banned the production and use of ozone-depleting substances. Therefore, the concentration of ozone-depleting substances in the atmosphere is declining, and the ozone layer has shown preliminary signs of recovery. The study by Banerjee et al. pointed out that ozone hole-related effects on circulation and climate have ceased since the ozone layer began to recover [1]. While others had noticed this trend of cessation of ozone hole effects before, Banerjee and others officially attributed it to the impact of the Montreal Protocol for the first time.
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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 | 0.008 | 0.032 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.005 | 0.006 |
| Scholarly communication | 0.004 | 0.006 |
| Open science | 0.003 | 0.003 |
| Research integrity | 0.018 | 0.036 |
| Insufficient payload (model declined to judge) | 0.008 | 0.004 |
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".