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Last modified
7/28/2009 2:31:54 PM
Creation date
10/22/2007 11:47:37 AM
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Weather Modification
Title
The Southern Plains Experiment in Cloud Seeding of Thunderstorms for Rainfall Augmentation Phase I (SPECTRA 1)
Prepared For
Texas Department of Licensing and Regulation
Prepared By
Duncan Axisa, Seeding Operations and Atmospheric Research
Date
3/1/2006
State
TX
Weather Modification - Doc Type
Report
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Figure 11a: Cloud droplet effective diameters vary Figure 11b: Precipitation size drops are <br />from around 6 to 19 µm. measured mostly above 2.6 km cloud depth. <br />1st Set1st Set1st Set <br />1st Set <br />Figure 11c: Cloud droplet concentrations peak at Figure 11d: CIP images at 23:30:07 (3187m), <br />1950 cm at 1400 m. Maximum CIP 23:30:35 (3444m), 23:37:52 (4357m), 23:38:24 <br />-3 <br />concentrations are measured at 4.2 km at 15.3 L. <br />(4257m). <br />-1 <br />The cloud droplet concentrations are relatively high throughout the vertical profile with cloud droplet <br />effective diameters varying from around 6 to 19 µm. These cloud droplets are small and do not increase <br />much with height. This indicates that both the warm phase and mixed phase precipitation are very <br />inefficient. The CIP shows that precipitation size drops are measured mostly above 2.6 km cloud depth <br />indicating the initiation of precipitation (Figure 11d). Cloud drafts appear to increase in intensity with <br />34 <br />
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