The influence of snow cover on northern hemisphere climate variability
Why this work is in the frame
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Bibliographic record
Abstract
Abstract The importance of snow cover anomalies on the local energy balance is well known, however, the potential impact of snow cover anomalies on local and remote atmospheric dynamics is less understood. We present observational evidence demonstrating a statistically significant relationship between seasonal snow cover and winter‐time circulation anomalies over mid‐high latitudes. To explore snow forcing further, a General Circulation Model is used to test whether the local diabatic changes caused by snow cover can induce large‐scale dynamical responses. A six‐member ensemble, three winter month (DJF) integration is performed for a control case and a case where snow cover is increased as observed during the positive‐anomalous winter of 1977/1978. Snow cover variability results in altered general circulation patterns resembling observed anomaly patterns at mid‐high latitudes in the Northern Hemisphere winter. Résumé [Traduit par la rédaction] L'importance des anomalies de la couverture de neige en rapport avec le bilan énergétique local est très bien connue, toutefois, l'impact potentiel des anomalies de la couverture de neige sur la dynamique atmosphérique locale et éloignée est moins compris. Nous présentons une preuve par observation démontrant une relation statistiquement significative entre la couverture de neige saisonnière et les anomalies de la circulation hivernale aux latitudes polaires et moyennes. Afin d'étudier d'avantage le forçage de la neige, un modèle de circulation générale est utilisé afin d'examiner si les changements diabatiques locaux, causés par la couverture de neige, peuvent produire des réactions dynamiques à grande échelle. Un ensemble de prévisions de six membres, pour trois mois d'hiver (DJF), est exécuté comme cas témoin et aussi dans le cas où on a augmenté la couverture de neige comme on l'a observé pendant l'hiver de 1977/1978 avec des anomalies positives. La variabilité de la couverture de neige donne comme résultat des configurations modifiées de la circulation générale ressemblant aux configurations des anomalies observées à l'hiver aux latitudes polaires et moyennes de l'hémisphère septentrional. Notes Corresponding author's e‐mail: jcohen@aer.com
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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 | 0.001 | 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 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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 it