A Study of the Trajectories and Diffusion Patterns of Ground-Generated Airborne Particulates under Orographic Wind Flow Conditions
AuthorKassander, A. Richard, Jr.
AffiliationInstitute of Atmospheric Physics, The University of Arizona
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AbstractIn late June and early July, 1956, a series of experiments were performed to determine the wind structure over an orographic barrier and to ascertain whether ground-generated aerosols reach cloud heights in such a situation. Zinc sulphide particles were dispersed in an oil fog from a ground-located fog generator and collections were made using airborne impactors. Particles were found at elevations of at least 14,000 feet at distances out to at least 20 miles. However, "plumes" were found to be considerably broader than had been anticipated and the structure of the wind over a mountain ridge is judged to be substantially more complex than has been assumed in cloud-seeding operations.
Series/Report no.University of Arizona, Institute of Atmospheric Physics, Scientific Report No. 5
SponsorsThe research reported in this document has been made possible through support and sponsorship extended by the National Science Foundation, under Contract No. NSF-G1101. It is published for technical information only, and does not necessarily represent recommendations or conclusions of the sponsoring agency.
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