Lagrangian behaviour and properties of deep stratospheric intrusions
Why this work is in the frame
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Bibliographic record
Abstract
This thesis studies through modelling the behaviour of deep stratospheric intrusions over North America during the period between August 13 and August 23, 2006.Such episodes are likely to introduce significant amount of ozone in the planetary boundary layer (PBL), an issue regarding air quality forecasts.Exchange events are identified using tridimensional kinematics trajectories.As they show a great morphological variety, the focus is on seven coherent intrusions that reach the PBL within 5 days.In all but one case, the development of a positive anomaly in the static stability underneath is observed to perturb the descent.Three of these events indeed experience strong dispersion at the top of the PBL and never penetrate it, while three others are simply slowed down and penetrate the PLB without much dispersion, causing important ozone perturbation.i Rsum Cette thse tudie l'aide d'un modle le comportement des intrusions stratosphriques dites profondes au dessus de l'Amrique du Nord entre le 13 et le 23 aot 2006.Ces pisodes sont susceptibles de transporter d'importantes quantits d'ozone dans la couche limite plantaire (PBL), un enjeu pour la qualit de l'air.Les vnements d'change sont identifis en traant les trajectoires cinmatiques tridimensionnelles.Comme les intrusions prsentent une morphologie trs diffrente, l'attention est fixe sur 7 descentes cohrentes qui atteignent la PBL en moins de 5 jours.Tous les cas, sauf un, sont accompagns d'une anomalie positive dans la stabilit statique qui se dveloppe sous l'intrusion et qui perturbe cette dernire.Trois de ces vnements se dispersent au dessus de la PBL sans y pntrer.Trois autres sont simplement ralentis en pntrant dans la PBL, causant des perturbations dans les niveaux d'ozone.
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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) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 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