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<br />experimental results and their implications is ample evidence of thl:! limitations
<br />of the "black-box" experimental approach. Credibility of the science of weather
<br />modification depends on understanding the physical reasons for the results of
<br />all experiments, whether they yield positive, negative, or no effect. As Braham
<br />(1981) suggests it is likely that the primary emphasis of future sc"ientific
<br />weather modification field experiments in the United States will be improving
<br />understanding of basic microphysical and dynamical processes in clouds, interac-
<br />tions between them and their reactions to seeding in a variety of cloud types
<br />and climatic regions. The distinction between seeding for microphysical effects
<br />only (static seeding) and dynamical effects only (dynamic seeding) will likely
<br />disappear as we clarify the role of environmental and cloud dynamics in
<br />controlling precipitation development and the effects of cloud microphysics on
<br />these dynamical processes.
<br />
<br />8. References
<br />
<br />Barnston, A. G., W. L. Woodley, J. A. Flueck, and M. H. Brown, 1983: The
<br />Florida Area Cumulus Experiment's second phase (FACE-2). Part I: The
<br />experimental design, implementation and basic data. J. Clim. Appl.
<br />Meteor., 22, 1504-1528.
<br />Bethwaite, F. D., E. J., Smith, J. A. Warburton, and K. J. Heffernam, 1966:
<br />Effects of seeding isolated cumulus clouds with silver iodide. J. Appl.
<br />Meteor., 5, 513-520.
<br />Blumenstein, R. R., W. G. Finnegan, and L. 0 Grant, 1983: Ice nucleation by
<br />silver iodide-sodium iodide - a reevaluation. J. Wea. Mod., 15~ 11-15.
<br />Braham~ R. R.,Jr., 1960: Physical properties of clouds. J. Irrig. Drain. Div.,
<br />Proc. ASCE, 86, 111-119.
<br />Braham, R. R.~Jr., 1981: Designing cloud seeding experiments for physical
<br />understanding. Bull. Amer. Meteor. Soc., 62, 55-62.
<br />Braham, R. R.,Jr., L. J. Battan, and H. R. Byers, 1957: Artificial nucleation
<br />of cumulus clouds, in cloud and weather modification, Meteor. Mono., 2,
<br />47-85.
<br />Browning, K. A. and G. A. Monk, 1982: A simple model for the graphic ana-
<br />lysis of cold fronts, Quart. J. Roy Meteor. Soc., 100, 435-452.
<br />Bureau of Reclamation, 1979: The design of HIPLEX-1, Report, Division of
<br />Atmospheric Resources Research, Bureau of Reclamation, U. S. Dept. of the
<br />Interior, Denver, CO, 271 pp.
<br />Cooper, W. A., 1984: Accretional growth processes in seeded and unseeded
<br />HIPLEX-1 clouds. Preprints Ninth Conference on Weather Modification~ Park
<br />City, UT, Amer. Meteor. Soc., 100-101.
<br />Cooper, W. A. and R. P. Lawson, 1984: Physical interpretation of results from
<br />the HIPLEX-1 experiment. J. Clim. Appl. Meteor., 23, In Press.
<br />DeMott, P. J., W. G. Finnegan, and L. O. Grant, 1983: An application of chemi-
<br />cal kinetic theory and methodology to characterize the ice nucleating pro-
<br />perties of aerosols used for weather modification. J. Clim. A~
<br />Meteor., 22, 1190-1203.
<br />Dye~ J. E., G. Langer, V. Tootenhoofd, T. Cannon, and C. Knight, 1976: Use of a
<br />sailplane to measure microphysical effects of silver iodide seeding in
<br />cumulus clouds. J. Appl. Meteor., 15, 264-274.
<br />English, M. and J. D. Marwitz, 1981: A comparison of AgI and C02 seeding
<br />effects in Alberta cumulus clouds. J. Appl. Meteor., 20,483-495.
<br />Finnegan, W. G., F. DaXiong, and L. O. Grant, 1984: Composite AgI-AgCl ice
<br />
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