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We’re proud and just a little bit excited to be able to offer an exclusive ‘cloud-bursting’ service to our customers, 100% guaranteeing fair weather and clear skies for when you tie the knot! Upon requesting the service, a crack team of pilots and meteorologists will begin meticulously planning the operation, which takes about three weeks and utilises particles of silver iodide to condense the water vapour from clouds into rain. Costs start at £100,000, but then this is some superhero-style weather modification we’ve got going on here – and what price perfection?
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.
originally posted by: network dude
a reply to: ShadowLink
Cloud seeding is localized. If it even works, it won't affect anything globally.
originally posted by: theantediluvian
What are the impacts to health and the environment from spraying silver iodide to seed clouds and is it cumulative?
9) Does cloud seeding have any significant negative environmental impacts?
There is no evidence that suggests cloud seeding creates any significant negative environmental impacts on the environment. Measurements made since the 1950’s indicate that the amount of silver iodide deposited in a target area after a long standing cloud seeding project falls several orders of magnitude (multiples of 10) short of the amount known to be toxic to plants, animals, trees, or humans. It is often difficult to detect any silver accumulation above the background amounts naturally present in the environment. Naturally, this kind of investigation continues. See FAQ #10, “Is Silver Iodide Harmful to the Environment?”
Warm cloud seeding is not conducted nearly as frequently as silver iodide cloud seeding, and the effect of warm cloud seeding agents on the environment is not as well known. Warm cloud seeding agents are salts. Preliminary results suggest that because the amounts of seeding agent used are so small, even these warm cloud seeding materials probably do not have any significant impacts.
When studying the efficacy and consequences of cloud seeding experiments, the experimenters tend to be biased in saying cloud seeding with silver iodide enhances precipitation without negative consequences. However, much of the literature substantiates that not only does cloud seeding fail to achieve the desired effect, it also yields harmful consequences. Some of these consequences include rain suppression, flooding, tornadoes, and silver iodide toxicity. (1,2,3)
originally posted by: ShadowLink
originally posted by: network dude
a reply to: ShadowLink
Cloud seeding is localized. If it even works, it won't affect anything globally.
Really? Is weather not a dynamic system?
The weather in one area or region affects another as it travels along it's course.
If we cloud seed to stop or increase rain in one area, will that not change the affect further down the line?
This quote from Wikipedia weather page addresses my concern perfectly.
"The atmosphere is a chaotic system, so small changes to one part of the system can grow to have large effects on the system as a whole."
"A pack of cement used in creating ... good weather in the capital region ... failed to pulverize completely at high altitude and fell on the roof of a house, making a hole about 80-100 cm (2.5-3 ft)," police in Naro-Fominsk told agency RIA-Novosti.
Ahead of major public holidays the Russian Air Force often dispatches up to 12 cargo planes carrying loads of silver iodide, liquid nitrogen and cement powder to seed clouds above Moscow and empty the skies of moisture.