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Background ozone over Canada and the United States

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Table 1. Summary of background ozone seasonal variations (a) and diurnal variations (b) by season (in ppb) for a given region
Table 2. Decadal trends modelled by GLMM using daytime (12:00–18:00 LST) average ozone mixing ratios from 1997 to 2006 by season
Table 3. A comparison of the statistical methods used and the background ozone trend esti- esti-mates focusing on Western Canada and US from three recent papers and this paper.
Fig. 1. Results of rotated PCA analysis using six-hour ozone averages for the period 1997–
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