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<br />. <br /> <br />to be adequate for the longitudinal, lateral and vertical wind components, <br /> <br />.1 <br /> <br />as well as true airspeed. <br /> <br />The turbulent diffusion characteristics of the airflow were measured <br /> <br />by the University of Wyoming well instrumented research aircraft, Super <br /> <br />. <br /> <br />King Air (K/A). The turbulence measuring capabilities of the KIA are exa- <br /> <br />mined, based on an intercomparison flight with the NCAR Queen Air N304D, <br /> <br />. <br /> <br />and cone I uded to be ade qua te dur ing light and modera te turbulence cond i- <br /> <br />tions. However, power spectra of the horizontal wind components indicated <br /> <br />that the K/A cannot make reliable turbulence measurements in negligible <br /> <br />. <br /> <br />turbulence conditions. <br /> <br />The LTD model is experimentally evaluated by comparing the calculated <br /> <br />. <br /> <br />plume dimensions with independent and simultaneously observed dimensions of <br /> <br />ice nuc Ie i and ice crys ta 1 plumes, in a var ie ty 0 f seeded clouds. The LTD <br /> <br />model shows a remarkably good agreement with the observations under light, <br /> <br />. <br /> <br />moderate and heavy turbulence conditions. On the other hand, the LTD model <br /> <br />failed to predict the diffusion of the seeded plume in strong wind shear <br /> <br />environment. <br /> <br />.1 <br /> <br />. <br />I <br /> <br />. <br /> <br />. <br />