Monday, July 21: DiscoverAQ/FRAPPE Fly-Day

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Day 6 of DiscoverAQ/FRAPPE. NASA P3 and B200 flying. High clouds, westerly winds, switching to SE in the afternoon. TOPAZ data were collected from 0702 to 1447 MDT. Low to moderate ozone concentrations (25 ? 50 ppbv) until 1530 MDT. Then, winds switches to SE and ozone mixing ratios jumped to about 70 ppbv, presumably with the arrival of the Denver ozone plume. 
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Note: Data are preliminary. Potential biases near clouds have not yet been fully corrected.