Weather modification (also known as cloud seeding) is an environmentally friendly way to generate more precipitation from clouds in the form of rain or snow. The most common form of weather modification is cloud seeding to increase rain or snow, usually for the purpose of increasing the local water supply. There have been no independent tests of these procedures, and as a result many other atmospheric scientists have hesitated to accept the claims of success at face value. http://en.wikipedia.org/wiki/Project_Stormfury#Project_Cirrus. The hypothesis was that the silver iodide would cause supercooled water in the storm to freeze, disrupting the inner structure of the hurricane. The benefit-to-cost ratios cited ranged from 4 to 1 up to 17 to 1. December 9, 2012 Weather modification also does not refer to climate change caused by industrial and natural sources of aerosols and gases such as carbon dioxide. For the most part, dry ice is dispersed from airplanes, but silver iodide nuclei may be generated on the ground and carried upward by air currents, introduced from airplanes, or produced by pyrotechnic devices such as rockets or exploding artillery shells. About Weather Modification. Weather Modification can be both planned, as is the case in cloud seeding, or inadvertent, for example, when pollution affects visibility. The term used to define this method of weather modification is called cloud seeding. When the supercooled clouds were seeded with grains of dry ice, ice crystals formed and grew large enough to fall out of the clouds. The operation was considered relatively successful. It works through the introduction of tiny particles ("seeds") that create additional droplets or ice, thereby accelerating the precipitation process and improving the cloud's efficiency. Cirrus was canceled and lawsuits were threatened. Investigation into the historical and current use of weather modification for military purposes. Weather modification can also have the goal of preventing damaging weather, such as hail or hurricanes, from occurring. Silver iodide seeding of potential hailstorms has been carried out in many countries. Schaefer discovered that when dry ice (frozen carbon dioxide) pellets were dropped into a cloud composed of water droplets in a deep-freeze box, the droplets were rapidly replaced by ice crystals, which increased in size and then fell to the bottom of the box. This disaster set back the cause of seeding hurricanes for eleven years. The 54th Weather Reconnaissance Squadron carried out the operation to “make mud, not war.”. Weather modification is the act of intentionally manipulating or altering the weather. Some of his experiments in seeding clouds preceded a heavy snowfall in Schenectady in the winter of 1946 and heavy rainfall near Albuquerque, N.M., on a day in July 1949 when no substantial rain was predicted. Various schemes have been employed to modify the electrical nature of clouds and the occurrence of cloud-to-ground lightning. However, it was later shown that this hypothesis was incorrect. This attempt was code named Project Cirrus. In summary, weather modification is a fascination and pursuit that human-kind has employed far longer than just the modern efforts we see in the media today. In fact, areas where cloud seeding is concentrated covers about one-sixth of the land area of Texas. I find it very difficult to find evidence of the use of weather modification for military purposes after that date because of the United Nations restrictions, however, there is enough evidence to substantiate that countries are continually advancing in this field. The first attempt to modify a hurricane began on October 13, 1947. It is necessary to find a means whereby a small input of energy may upset a natural instability and lead to large results. Weather modification in the UK Response to a request for information on weather modification techniques in the UK. He refers to “weather war,” indicating that the U.S. and the Soviet Union had already: “mastered the know-how needed to unleash sudden climate changes (hurricanes, drought) in the early 1980s.”(3) These technologies make it “possible to trigger atmospheric disturbances by using Extremely Low Frequency (ELF) radar [waves].”, Sourced: (Marc Filterman, Intelligence Newsletter, (December 16, 1999) (http://www.globalresearch.ca/articles/CHO201A.html). On August 19, the day between the two flights, the storm reportedly reintensified. http://en.wikipedia.org/wiki/Project_Cumulus. What can they do with weather modification now? Redistribution of precipitation always raises the possibility of redistribution of water among various basins.…, …to his subsequent interest in weather modification by seeding clouds with small particles. Published 23 June 2014 From: Department of Energy & … By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. This process is called Cloud Seeding . The NAWMC has developed three brochures on the basics of cloud seeding. It had been speculated that they might be influenced by firing rockets into them and distributing materials to modify their temperature structure or electrical properties.