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<br />mountain range. Turbulence parameters in this prefrontal region showed good agreement with K-mixing <br />lengt!1 theory. Within the frontal zone, most turbulence parameters reached peak values, but were <br />generally less than orographically induced turbulence values in the prefrontal period. <br /> <br />Turbulence in the low-level postfrontal period experiem:ed periodic oscillations consistent with <br />precipitation and kinematic variables described in Parts I and II, and associated with mesoscale <br />precipitation bands. Acceleration of the valley-parallel wind component was apparent in prefrontal and <br />postfrontal periods and was related to the specific valley configuration through a Venturi effect. <br /> <br />Campistron, B., A. B. Long, and A. W. Huggins, 1991: A method of retrieving turbulence parameters from <br />volume processing of single-Doppler radar measurements. Journal of Atmospheric and Oceanic <br />Technology, 8:491-505. <br /> <br />In previous work, the derivation of turbulence parameters from single-Doppler radar observations was <br />petformed with data acquired along a horizontal circle. Here the technique is extended to all the radar <br />data within a horizontal cylindrical slice of fmite depth using the same basic assumptions of linearity of <br />the mean wind field and horizontal homogeneity of the turbulence. The method allows the extraction of <br />the six Reynolds stress components, together with their vertical derivatives, and the turbulent fluxes of a <br />scalar quantity deduced from the reflectivity data. <br /> <br />Experimental data were used for the performance evaluation of the methodology. A simple testing <br />procedure was carried out to remove erroneous results. The statistical uncertainty in the measured <br />Reynolds stress terms was found to be about 0.05 m2 S.2, except for the variance of the vertical <br />component, which was poorly retrieved because of an absence of data at high elevation angles. <br />Calculations showed that contamination of the vertical momentum flux measurements by the scatterer <br />fall speed was negligible. An analysis of the response function of the technique to the atmospheric <br />scales tended to show that the diameter of the processing slices corresponded to the largest turbulent <br />scale dimension involved in the measured turbulence quantities. <br /> <br />Chai, S., W. G. Finnegan. R. L. Pitter, and J. A. Warburton, 1989: A mechanistic interpretation of a winter <br />orographic cloud seeding program. Proceedings, 5th WMO Scientific Conference on Weather <br />Modification and Applied Cloud Physics, Beijing, China, May 8-12, 1989. World Meteorological <br />Organization, Geneva, WMO/TD-No. 269, 1:179-183. <br /> <br />No abstract. <br /> <br />Changnon, S. A., 1992: Are we doomed to fail in drought management? Proceedings, National Forum on Water <br />Management Policy. American Water Resources Association, Reston, VA, 1-17. <br /> <br />No abstract. <br /> <br />Changnon, S. A., 1992: Inadvertent weather modification: Its status and relevance to global climate change. <br />Preprints, Symposium on Planned and Inadvertent Weather Modification, Atlanta, GA, January 5-10, <br />1992. American Meteorological Society, Boston, MA, 63-69. <br /> <br />No abstract. <br /> <br />17 <br />