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They can. Especially when they turn into cirrus.
Yes, i forgot, contrails persist for an entire day.
Somewhat, though some might call it more art than science.
Isn't cloud seeding a science?
Those that do it insist they can but it's sort of hard to tell whether the cloud they seeded would have rained on its own or not. I think it might help a bit, under favorable conditions.
Can they or can they not make it rain, Phage???
So many LIES!
Phage
reply to post by WonderBoi
They can. Especially when they turn into cirrus.
Yes, i forgot, contrails persist for an entire day.
Somewhat, though some might call it more art than science.
Isn't cloud seeding a science?
Those that do it insist they can but it's sort of hard to tell whether the cloud they seeded would have rained on its own or not. I think it might help a bit, under favorable conditions.
Can they or can they not make it rain, Phage???
But, cloud seeding isn't done in clear skies. Cloud seeding isn't done at 30,000+ feet. Cloud seeding does not make clouds. Cloud seeding is not "chemtrails".
edit on 12/28/2013 by Phage because: (no reason given)
Do a little more research before you stamp your name on such drivel.
The Beijing Weather Modification Office spent a lot of time researching how to prevent rain in the city during the Aug. 8 opening ceremony of the 2008 Summer Olympics. The government even guaranteed clear skies for the event -- a promise it managed to deliver on. The feat only took the launch of 1,104 rain dispersal rockets from 21 sites in the city to pull off [source: O'Neill]. Even in areas with very low humidity, there's at least some water in the sky and clouds. A rainstorm happens after moisture collects around naturally occurring particles in the air, causing the air to reach a level of saturation at which point it can no longer hold in that moisture. Cloud seeding essentially helps that process along, providing additional "nuclei" around which water condenses. These nuclei can be salts, calcium chloride, dry ice or silver iodide, which the Chinese use. Silver iodide is effective because its form is similar to ice crystals. Calcium chloride is often used in warm or tropical areas.science.howstuffworks.com...
So many LIES!
'Cloud Seeding' Not Effective at Producing Rain as Once Thought, New Research Shows
science.howstuffworks.com...
Despite some successful tests, cloud seeding still has many problems. The fundamental concern is: Does it work? It may be a chicken-and-egg conundrum -- would it have rained in a given area without the use of cloud seeding, and would it have rained less? Cloud seeding also depends heavily on environmental conditions like temperature and cloud composition.
tsurfer2000h
reply to post by luxordelphi
There is only the occassional rare contrail that, in freak instances, persists.
I would love to see the science behind this, so care to provide a link that shows it?
I have provided links, many times.
How Stuff Works: "Cloud Seeding"
Northern China, where Beijing is located, doesn't receive much rain -- its rainfall levels are 35 percent below the world average, and some of its water supplies are significantly polluted. The area relies heavily on cloud seeding. Zhiang Qiang, who runs the Beijing Weather Modification Office, told the Asia Times that water levels in Beijing's water basins have increased up to 13 percent due to cloud seeding [source: Aiyar]. Cloud seeding also has been used to cool Beijing on hot days.
WonderBoi
Yes, i forgot, contrails persist for an entire day. Isn't cloud seeding a science? That's really what i'm don't get with you.
Can they or can they not make it rain, Phage???
Here's your link
Static cloud seeding involves spreading a chemical like silver iodide into clouds. The silver iodide provides a crystal around which moisture can condense. The moisture is already present in the clouds, but silver iodide essentially makes rain clouds more effective at dispensing their water.
Dynamic cloud seeding aims to boost vertical air currents, which encourages more water to pass through the clouds, translating into more rain [source: Cotton]. Up to 100 times more ice crystals are used in dynamic cloud seeding than in the static method. The process is considered more complex than static clouding seeding because it depends on a sequence of events working properly. Dr. William R. Cotton, a professor of atmospheric science at Colorado State University, and other researchers break down dynamic cloud seeding into 11 separate stages. An unexpected outcome in one stage could ruin the entire process, making the technique less dependable than static cloud seeding.
Hygroscopic cloud seeding disperses salts through flares or explosives in the lower portions of clouds. The salts grow in size as water joins with them. In his report on cloud seeding, Cotton says that hygroscopic cloud seeding holds much promise, but requires further research.
science.howstuffworks.com...
Despite some successful tests, cloud seeding still has many problems. The fundamental concern is: Does it work? It may be a chicken-and-egg conundrum -- would it have rained in a given area without the use of cloud seeding, and would it have rained less? Cloud seeding also depends heavily on environmental conditions like temperature and cloud composition.
science.howstuffworks.com...
Despite some successful tests, cloud seeding still has many problems. The fundamental concern is: Does it work? It may be a chicken-and-egg conundrum -- would it have rained in a given area without the use of cloud seeding, and would it have rained less? Cloud seeding also depends heavily on environmental conditions like temperature and cloud composition.
Have to do with "chemtrails". Cloud seeding does not make clouds. Cloud seeding is not done over widespread areas. Cloud seeding is not done at 30,000+ feet.
The moisture is already present in the clouds, but silver iodide essentially makes rain clouds more effective at dispensing their water.
Some successful tests? 1200 missions over Beijing is hardly considered "some". My 7 year old daughter understands this stuff.
Despite some successful tests, cloud seeding still has many problems
Abstract Balloons and U-2 aircraft were used to collect micrometer-sized strato-spheric aerosols. It was discovered that for the past 6 years at least, aluminum oxide spheres have been the major stratospheric particulate in the size range 3 to 8 micrometers. The most probable source of the spheres is the exhaust from solid-fuel rockets.
I find it difficult to believe that your heart is really in this argument BUT, on the off chance that it is:
I could post 1,000 links and you'd debunk everyone of them.