ATMOSPHERIC POLLUTION BY OZONE: ITS EFFECTS AND VARIABILITY
MASSACHUSETTS INST OF TECH CAMBRIDGE
Pagination or Media Count:
Surface ozone concentrations were measured in the Boston-Cambridge complex for the months of November and December, 1964 and January, 1965. The instrumentation used was a Mast ozone meter and recorder a chromium trioxide filter was fitted to the air inlet of the meter to remove negatively interfering sulphur dioxide. The effectiveness of this filter was remarkably apparent in that removal of the filter caused ozone reductions of 50-100. The overall range of ozone levels for the three months was 0.1 to 6.4 pphmv part per hundred million by volume, well below toxic limits discussed in detail in this thesis. The average values for each of the three months indicate a possible correlation with the total ozone trend. Variation of the daily values is discussed with some meteorological factors as well as source strength. Seven simultaneous measurements of some of the halogens, obtained from a separate study by a colleague, are related to ozone concentrations.
- Inorganic Chemistry
- Air Pollution and Control