Saturday, May 27
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TOPAZ data were taken from 07:40 - 18:20 PDT. High pressure was moving in from the west with a shortwave trough to the northeast. Seasonal temps (34 C), light winds, a few Cu clouds over the nearby mountains. MicroDop lidar observed intermittent turbulence at night up to about 3 km AGL. The convective daytime BL rose to about 2.5 km AGL in the afternoon. Surface ozone stayed elevated (35-55 ppbv) overnight and increased to about 60 ppbv in the afternoon. TOPAZ observed an ozone layer aloft (~ 65 ppbv) between 2.5 and 3.5 km AGL. That layer thinned during the day and was most likely entrained into the BL in the early afternoon. There was high ozone (~80 ppbv) above 4.5 km AGL associated with the shortwave trough.