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TexAQS 2006 TOPAZ Lidar data

August 15 - Final Data


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Flight #9
Takeoff: 14:15 CDT
Total flight time: 5.7 hours

Southerly flow was much lighter (less than 3 m/s and of variable direction during the midday period) on this day than previous days, producing ozone concentrations in excess of 150 ppb clustered near but just north of the urban/ship-channel source region. The Twin Otter sampled this with mostly north-south and diagonal flight legs across the urban and ship channel areas, repeating some legs to assess temporal changes in the ozone distribution. Visual haze and high mixed-layer depths reaching 2 km were observed in two consecutive cross sections over the urban area, compared with approx. 1.5 km BL heights elsewhere. Late-day clean, southeasterly sea-breeze flow reaching 5 m/s could be seen to undercut the polluted air columns. A Ron Brown overflight occurred at 18:26 CDT.

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Ozone Cross-section
Ozone cross-section - August 15
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Aerosol Cross-section
Aerosol cross-section - August 15
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Ozone Map
Ozone map - August 15
Mixed Layer Height Map
Mixed layer height map - August 15
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download simple ASCII data (txt file)