t08 Ozone peaks on a schedule
Supplied working report; original verdicts not validated.
Review status: Needs review. This is an archival source note, not a passed proof.
notes.md
# t08 Ozone peaks on a schedule Across 895 US sites, ozone peaks at 14:00 local, with 98% of sites peaking between 12:00 and 16:00 and a site-to-site standard deviation of 1.5 hours. The weekday and weekend peak hours are identical (14:00 vs 14:00) even though the two days run on different emission schedules, so the peak time is set by sunlight, not by the emission schedule. The nationwide weekday and weekend peak concentrations were nearly equal (ratio 1.002), which is why the magnitude-contrast part of the claim is left to a regime-specific study. The posted prediction - that the peak tracks photochemical timing - is supported.