can scientists artificially form rain ?

Answer 1

yes!

Artificial rain is produced by spraying clouds with substances like Silver Iodide (costly) or cheaper ones like solid carbon dioxide (dry ice) or even finely powdered Sodium Chloride. The process is called seeding.

Often there are clouds, but no rain. This is because of a phenomenon called supercooling. The temperature of the cloud might be close to zero and there might even be crystals of ice in it.

The water vapour in the cloud does not condense to liquid water. The super cooling gets disturbed by spraying the cloud with the chemicals mentioned above, using a small aeroplane for the purpose.

The `super' phenomena (cooling, heating, saturation etc.) are perverse in a sense. Very pure water when heated in a clean vessel, often does not start boiling when expected. Crystals of the photographer's hypo (Sodium thiosulphate) easily dissolve in a little water when heated. But on cooling, crystals do not separate out.

If the vessel is shaken vigorously, or if a small crystal of hypo is freshly added, then crystallization starts immediately.

Making artificial rain is a similar way of intervening in the super cooling phenomenon.

Answer 2

Expensive, but they seed the clouds with dry ice to make it rain. China did it last year over Beijing. The drought was so bad the streets and city were suffering from a buildup of dust. They seeded the clouds to cause the rain and wash it off.

Answer 3

If the clouds are present they can bring the rain. They dont make artificial clouds and whole 9 yards

Answer 4

Cloud seeding is a form of weather modification.

As warm air rises from the Earth, it begins to cool and forms tiny droplets of water that condense into cloud droplets. Cloud droplets are formed around particles of dust, salt, or soil (called cloud condensation nuclei) that are always present in the atmosphere.

These cloud droplets group together into clouds, which can form precipitation. In warm temperatures, the droplets in the clouds merge with many other droplets and become heavy enough to fall to the Earth as rain. (It takes millions of cloud droplets to form a single raindrop.)

In hygroscopic seeding, salt crystals are released into a cloud. These particles grow until they are large enough to cause precipitation to form.

Answer 5

yeah they sell the stuff in the store now to do it. Its right next to old pappys snake oil. Nah but really there is a process called cloud seeding seems to work some of the time. Or you can do a rain dance worked for me once. And one other, is to just go wash your car it always rains after i wash mine. STUPID RAIN *shakes fist at the sky*

Answer 6

seeding the clouds will usually butnot alwys produce rain. Silver iodine or dry ice is used as the seed. It gives a better chance that rain or ice droplets will form.

Answer 7

It is possible to "seed" clouds by spraying tons of very tiny particles into them. Water vapor in the cloud turns to liquid droplets and attaches to these particles. When the droplets get heavy enough with water, they fall as rain.

Answer 8

yes they can. Actually not form rain from nothing but to induce rain. Using water vapour and forming clouds. It takes like one day to form.

Answer 9

Yes, clouds can be seede with substances like Silver Chloride (AgCl) to induce droplet formation and hence rain.

Answer 10

yes but it costs so much that its used only on severe droughts