Hemispheric pollution behavior studies of chemical and radiation substances

Researchers at an air monitoring station in Quillayute, WA, measuring aerosol levels in the upper atmosphere, have determined from data collected from 1975 to 1977 that ozone concentrations peak in the spring and fall. The high ozone level in the spring probably results from ocean-trajectory air being brought in by strong off-shore flows; high levels in September and October may result from upper air being pushed down by upper-level high pressure areas and from polluted, stagnant air from the Puget Sound industrial area pushed westward by shifting flows