Weekday and Seasonal Variations in NO<sup>2</sup> in Southern Ontario, Canada using Data from the Ozone Monitoring Instrument (OMI)
Bibliographic record
Abstract
Data from the Ozone Monitoring Instrument (OMI) are used to investigate the weekday and seasonal variations in nitrogen dioxide (NO2) densities observed over southern Ontario, Canada. Total column and tropospheric density data gridded at 1deg times 1deg follow the weekday pattern observed by fixed monitoring stations on the ground, with decreased concentration on the weekends and highest values during mid-week. While seasonal patterns from tropospheric data are similar to ground observations, the total column vertical density pattern shows a summer NO2peak. Additional higher resolution tropospheric data, gridded at 0.25deg times 0.25deg for a smaller area encompassing the city of Hamilton, Ontario, show weekly and seasonal patterns which conform closely to those observed on the ground. While univariate linear regression indicate that OMI tropospheric NO2explain only 20% of ground observations (R2= 0.20), multivariate analyses with variables representing local meteorology, seasons and other pollutants, yield an R2value of 0.81.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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 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".