Figure 4
FTC-CSU and Greeley polar O3 histograms. Polar histograms with O3 mole fractions based on wind direction at FTC-CSU from 5:00–10:00 (a) and 10:00–15:00 (b) and at Greeley from 5:00–10:00 (c) and 10:00–15:00 (d) for July 15 to August 10, 2014. O3 mixing ratios (in ppb) are indicated by color and the percentages represent the frequency of wind coming from a particular direction. DOI: https://doi.org/10.1525/elementa.254.f4

FTC-CSU and Greeley polar O3 histograms. Polar histograms with O3 mole fractions based on wind direction at FTC-CSU from 5:00–10:00 (a) and 10:00–15:00 (b) and at Greeley from 5:00–10:00 (c) and 10:00–15:00 (d) for July 15 to August 10, 2014. O3 mixing ratios (in ppb) are indicated by color and the percentages represent the frequency of wind coming from a particular direction. DOI: https://doi.org/10.1525/elementa.254.f4

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