Saturday, July 26: DiscoverAQ/FRAPPE Fly-Day

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Day 11 of DiscoverAQ/FRAPPE. NASA B200 and NCAR C130 flying. Partly cloudy. TOPAZ data were collected from 0704 to 1544 MDT. Very low ozone mixing ratios in the 10s ppbv were observed in the lowest 100 m AGL from 0800 ? 1000 MDT. Around midday, ozone levels increased rapidly and peaked at about 80 ppbv in the afternoon.

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Note: Data are preliminary. Potential biases near clouds have not yet been fully corrected.