Trends and Variability in Total Ozone from a Mid-Latitude Southern Hemisphere Site: The Melbourne Dobson Record 1978–2012
Bibliographic record
Abstract
The Australian Bureau of Meteorology maintains a number of long-running Dobson measurement programs, among the few in southern hemisphere mid-latitudes.Data from the Melbourne site (the Melbourne/ Airport World Ozone and Ultraviolet Radiation Data Centre (WOUDC) station was originally located at Aspendale, then moved to the city centre, and finally to Melbourne Airport) from 1978 to 2012 have recently been reviewed and re-evaluated.These data are analyzed using multi-linear regression and also by application of an 11-year running mean.Satellite data from the Merged Ozone Dataset are also used for comparison with the Dobson results.We show that the Quasi-Biennial Oscillation (QBO) plays a major role in winter and spring once phase is taken into account by month.We also show that the three so-called "classical" proxies (QBO, solar cycle, and Equivalent Effective Stratospheric Chlorine (EESC)) alone are able to give a good fit to ozone for Melbourne and, more generally, the southern mid-latitudes for most months of the year, in contrast with the case in the northern hemisphere where dynamical variation plays a much more important role.Correspondingly, the smoothed Melbourne Dobson time series shows a high correlation to EESC.RSUM [Traduit par la rdaction] Le Bureau of Meteorology d'Australie maintient un certain nombre de programmes de mesures Dobson de longue haleine, un des rares programmes pour les latitudes moyennes de l'hmisphre Sud.Les donnes du site de Melbourne (la station du Melbourne/Airport World Ozone and Ultraviolet Radiation Data Centre (WOUDC) tait initialement situe Aspendale, puis a t dmnage au centre de la ville et finalement l'aroport de Melbourne) de 1978 2012 ont rcemment t passes en revue et rvalues.Nous analysons ces donnes au moyen de la rgression linaire multiple et aussi par l'application d'une moyenne mobile de 11 ans.Nous utilisons aussi les donnes satellitaires du Merged Ozone Dataset pour la comparaison avec les rsultats Dobson.Nous montrons que l'oscillation quasi-biennale joue un rle majeur en hiver et au printemps lorsque la phase est prise en considration pour chaque mois.Nous montrons aussi que les trois variables explicatives dites classiques (oscillation quasi-biennale, cycle solaire et quivalent chlore stratosphrique efficace) peuvent elles seules produire une bonne repr/sentation de l'ozone Melbourne et, plus gnralement, aux latitudes moyennes Sud pour la plupart des mois de l'anne, contrairement au cas de l'hmisphre Nord o les variations dynamiques jouent un rle beaucoup plus important.De ce fait, la srie chronologique lisse des donnes Dobson de Melbourne affiche une corrlation leve avec l'quivalent chlore stratosphrique efficace.
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How this classification was reachedexpand
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 | 0.001 | 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 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.046 | 0.001 |
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; both teacher heads agree on what is shown here.
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".