There is no rain in the sky, so how does artificial rain get it?

What is "artificial rainfall" all about? After reading it today, I can be considered to understand.

Raindrops are formed when a rainfall agent containing silver iodide is placed on an airplane and propagated through the clouds, increasing the density of the clouds.

Cooling. Because there is no rain in the sky, but there are clouds, as long as the clouds are cooled, the water vapor in the clouds will liquefy, so artificial rain is made by cooling down.

Artificial rainfall is the use of chemicals to liquefy clouds in the sky. Then it will become raindrops falling, and artificial rain will be realized.

No way. Cloudy or sunny weather does not allow artificial rainfall.

Artificial precipitation refers to the process of artificially supplementing certain necessary conditions for the formation of precipitation according to the principle of precipitation formation in nature, and promoting the rapid condensation or collision of cloud droplets and increase into raindrops and falling to the ground.

Artificial rainfall is conditional. Generally, under the condition that natural clouds have been precipitated or close to precipitation, the method of artificial precipitation can play a role.

The first is that there must be clouds in the sky, and without clouds, no one can make rain out of thin air. Secondly, the clouds also need to have certain conditions before artificial rainfall is possible. For example, there should be large water droplets in warm clouds above 0; There should be ice crystals in cold clouds below 0.

Without this condition, no matter how good the cloud conditions are, it will not rain.

In natural circumstances, such microphysical conditions are sometimes not available; Sometimes it is available, but it is not sufficient. The former does not produce precipitation at all; In the latter, there is very little rainfall. At this time, if artificial ice cores are sown into the clouds, the ice-water transformation process of condensation or condensation will occur in the clouds, and then with the help of the natural collision and merging process of water droplets, rainfall can be produced or increased.

Therefore, artificial rain enhancement is not "out of nothing", and must have certain conditions for clouds and water in the air.

In other words, artificial rain does not produce precipitation in the sky "out of nothing", but "helps" the clouds to meet the conditions for precipitation, so that it rains in the clouds, or turns light rain into heavier rain. Therefore, artificial rainfall is also called artificial rainfall.

According to the physical characteristics of different clouds, the use of catalysts such as dry ice, silver iodide, salt powder, etc., to promote the rapid condensation of cloud droplets into water droplets, and then make them fall to the ground, which is artificial rainfall.

It is difficult to artificially rain when there are few clouds.

This is really there, and it is not a new technology, it has been out for almost 20 years, as early as August 2008, during the Beijing Olympic Games, it was done during the Beijing Olympic Games, during that time the Beijing-Tianjin-Tang and Hebei areas happened to be rainy for a long time, in order not to affect the normal progress of the Olympic Games, but also during the rehearsal of the opening ceremony, the Beijing Meteorological Department obtained the support of the army through the General Staff Department, and sent planes to spray chemicals over Beijing every day, which basically achieved the desired effect perfectly. At that time, even the suburbs of Beijing were raining heavily for three days, that is, it was not raining in the urban area of Beijing, at most it was a cloudy day, and the most serious thing was that there was a little drizzle, and even the ground was not completely wet.

Now more than ten years have passed, artificial rainfall, rain reduction, and even rain elimination technology has made a qualitative leap, but there is a technical problem that has not been solved, that is: no matter how artificial prevention, it is impossible to let the rain disappear out of thin air, it should always fall, but through manual intervention, let it go in advance, or push it back, or even disperse it to an inconsequential place to go down, but not let it not go down, this is a bit like the law of indestructibility of matter and conservation of energy, At the current pace of scientific development, I believe that this problem will still be solved in the near future.

1. Artificial rainfall refers to the use of airplanes and rockets to sow dry ice, silver iodide, salt powder and other catalysts into the clouds according to the physical characteristics of different clouds, so as to relieve or alleviate the drought of farmland, increase the irrigation water or water supply capacity of reservoirs, or increase the amount of power generation. China's earliest experiment with artificial rainfall was in 1958, when Jilin Province was hit by a drought not seen in 60 years.

2. Artificial precipitation, also known as artificial precipitation, refers to the process of artificially supplementing certain necessary conditions for the formation of precipitation according to the principle of precipitation formation in nature, and promoting the rapid condensation or collision of cloud droplets and increase into raindrops and falling to the ground.

Artificial rainfall uses the physical principles of clouds and precipitation to spread rainfall agents (salt powder, dry ice or silver iodide, etc.) into the clouds, so that cloud droplets or ice crystals increase to a certain extent and fall to the ground to form precipitation, also known as artificial precipitation. Methods of spreading include aircraft scattering in the clouds, anti-aircraft guns or rockets shooting silver iodide shells into the clouds**, and burning silver iodide flames on the ground. It is the most widely conducted weather modification experiment.

The microphysical process of artificially influencing clouds can make clouds that could not precipitate naturally under certain conditions be stimulated and precipitated, and can also make those clouds with more water and often able to precipitate naturally, improve the precipitation efficiency and increase the amount of precipitation. However, clouds that cannot be naturally precipitated have less water, so the economic value of artificial catalysis is limited.

According to the principle of precipitation formation in nature, artificial rainfall artificially supplements some necessary conditions for the formation of precipitation, and promotes the rapid condensation or collision of cloud droplets and increases into raindrops and falls to the ground.

Subheading: Artificial rain is the projection of silver iodide shells into the clouds by airplanes, anti-aircraft guns or rockets**, and the burning of silver iodide flames on the ground. It is an anti-aircraft gun specially developed for rainfall.

The contents of the shells are salt powder, dry ice, or silver iodide, etc.

According to the physical characteristics of different clouds, choose the right time to use airplanes and rockets to sow dry ice, silver iodide, salt powder and other catalysts into the clouds, so as to make the clouds precipitation or increase the amount of precipitation, so as to relieve or alleviate the drought of farmland, increase the irrigation water or water supply capacity of reservoirs, or increase the amount of power generation.

Artificial precipitation, also known as artificial precipitation, according to the physical characteristics of different clouds, choose the right time, use aircraft, rockets, etc. to spread dry ice, silver iodide, salt powder and other catalysts into the clouds, promote cloud precipitation or increase precipitation.

If the clouds are not up to the conditions, it will naturally not be able to form rainfall.