Monday, May 22
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TOPAZ data were taken from 09:14 - 19:14 PDT. Warm temperatures with a high around 38 C, light winds. Surface and BL ozone peaked in the low 60s ppbv in the early evening. A moderate ozone layer containing enhanced aerosols was observed between 2 and 4 km AGL until midday. Enhanced ozone was measured again around 6 km AGL.