S.Henry+Energy+Wiki

__CLOUD SEEDING__



The problem at hand is that in the next 20-30 years there will not be alot of water and enegry sources. The driving force of this problem is the change in atmosphere and lobal cllimate change. People have been trying to find a source that doesnt have many negative effects.

Cloud seeding is a form weather modification. Cloud seeding can be used to disperse fog, suppress hail or control winds.It introduces other particles into a cloud to serve as cloud condesation nuclei and aid in formation of precipitation. When the temperature is warm droplets merge with other droplets become heavy enough to fall on Earth as rain. Clouds can be seeded from above with help from airplanes that drop pyrotechnics or from the ground by using artillery or ground to air rockets.There are three forms of cloud seeding:static mode.dynamic mode and hygroscopic seeding. Static mode seeks to increase rainfall by adding ice crystals to cold clouds. Dynamic mode increases rainfall by enhancing vertical air currents in clouds and thereby vertically process more water through the clouds which means more ice crystals are added than in the static mode. In Hygroscopic seeding salt crystals are released into a cloud, these particles grow until they are large enough to cause precipitation to form. In 1993 Cloud seeding increased rainfall in height by 7%, rainfall coverage increased by 43%, duration of storms increased 36% & volume of rain increased 130%.

CO2 is one of the common chemicals used in Cloud Seeding, it is used in the form of dry ice. The best aspects of Cloud seeding are:it can reduce the velocity of hazardous hurricanes and influence the location of intense rainstorms. It also atlers cloud structure and size and converts cloud water to ice particles and improve air quality by encouraging rainfall. Although scientists think Cloud seeding is effective the also think that one problem it has is that it is difficult to discern how much precipitation would have occurred had the cloud not been seeded which means they cannot tell what is natural or additional precipitaion. People believe that by used this method it is stealing rain from some where else and that science shouldn't interfere with nature. Cloud seeding is used but not very much because of the controversy behind it.

I dont think that there is a better way to do Cloud seeding on a large scale. Cloud seeding is used in the People's Republic of China who believe that it increases the amount of rain over several increasingly arid regions by firing silver iodide rockets into the sky where rain is desired. It is said that in the 2008 summer Olympics in Beijing they will be seeding the clouds so that there will be no rain during the medal ceremonies. What I would change about Cloud seeding is that it would only be used on areas that have droughts.

Comments On Cloud Seeding:
 * At the July 2006 G8 Summit, President Putin commented that air force jets had been deployed to seed incoming clouds so they rained over Finland. Rain drenched the summit anyway.
 * In December 2006, the Queensland government of Australia announced AUD$7.6 million in funding for "warm cloud" seeding research to be conducted jointly by the Australian Bureau Of Meteorology and the United States National Center for Atmospheric Research.