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Las Vegas Ozone Study TOPAZ Data

June 1, 2013


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Daily Summary:

June 1. Saturday. Clear skies, haze in the valley. Light SE upslope flow brought urban air to Angel Peak quite early around 0900 PDT. O3 at Angel Peak dropped from the low 60s to mid 50s ppbv with arrival of slightly less O3-rich urban air. By midday, O3 had increased back to the low 60s ppbv. CO did not vary much, staying around 120 ppbv. Winds switched to NE direction at Angel Peak and in the valley by mid morning, transporting the core of the Las Vegas urban plume towards the SW.
Note: These preliminary data are noisy above 2 km AGL and exhibit a low bias due to the solar background.

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Ozone Cross-section
Ozone Cross-section - June 1