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By William R. Cotton

This re-creation of Human affects on climate and weather examines the medical and political debates surrounding anthropogenic affects at the Earths weather and provides the latest theories, facts and modeling stories. The publication discusses the suggestions in the back of planned human makes an attempt to change the elements via cloud seeding, in addition to inadvertent amendment of climate and weather at the nearby scale. The common variability of climate and weather tremendously complicates our skill to figure out a transparent cause-and-effect dating to human task. The authors describe the fundamental theories and critique them in easy and available phrases. This absolutely revised version should be a necessary source for undergraduate and graduate classes in atmospheric and environmental technological know-how, and also will entice coverage makers and common readers attracted to how people are affecting the worldwide weather.

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A single, heavy rainfall day swamped the natural rainfall statistics). Lacking in the dynamic seeding research is an identification of the hypothesized chain of physical processes that lead to enhanced rainfall on the ground over a target region. , 1979; Sax and Keller, 1980; Hallett, 1981). The onedimensional models clearly predict that artificial glaciation of a cloud should result in increased vertical development of the cloud. Those one-dimensional models, however, cannot simulate the consequences of increased vertical growth.

This could lead to more intense dynamic responses as proposed by Bigg, suggesting that seeding with smaller hygroscopic particles may have some advantages. Keep in mind, however, that this is a very simple model. More comprehensive model calculations should also be performed. The Mexican hygroscopic seeding experiment described by Bruintjes et al. (1999, 2001) was a randomized experiment on convective storms, based on a floating target design, aimed at replicating the South African hygroscopic seeding experiment using the same flare design.

Finally, since the main response to seeding is delayed in time for as much as 6 hours following the cessation of seeding, we lack a clear understanding of the actual processes that can lead to such a physical response. 1 Introduction For hundreds if not thousands of years man has sought techniques for suppressing hail. This has ranged from ringing bells, to firing cannons, to the modern era of cloud seeding (Changnon and Ivens, 1981). , the Fort Collins, Colorado hailstorm of 1983). Scientific programs aimed at developing a hail suppression effort using cloud seeding strategies began in the 1950s in the Soviet Union and in Alberta, Canada.

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