Planetary wave two signatures in CRISTA 2 ozone and temperature data
Bibliographic record
Abstract
The Cryogenic Infrared Spectrometers and Telescopes for the Atmosphere (CRISTA) instrument has flown on two shuttle missions providing observations of constituents and temperature throughout the stratosphere and mesosphere at high vertical and horizontal resolution. During the second mission (CRISTA 2: August 7-17, 1997) a wave two signature was observed in the southern midlatitudes in the temperature data between 17 and 80 km and in the ozone data between 17 and 63 km (the limits of ozone data availability for the current data version). This signature has a period of ∼12.5 days and a vertical wavelength of ∼45 km. It is one of the few observational instances showing vertical and equatorward propagation of a planetary wave well into the mesosphere. The relative phase of the signature in the temperature and ozone varies with height with the two being in phase below 30 km and 180 degrees out of phase above 40 km. These signatures are consistent with those expected from a migrating planetary wave with the ozone signature being dynamically driven at lower altitudes and photochemically driven at higher altitudes. The CRISTA results above the middle stratosphere show a greater agreement with photochemical equilibrium calculations than previous analyses. These results clearly illustrate the penetration of a dynamical feature from the tropopause into the mesosphere and its effect on constituent distributions throughout this height range.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.005 | 0.002 |
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".