Under what weather conditions can artificial rainfall enhancement be implemented?

First, there needs to be enough water vapor in the sky, that is, there must be clouds, and the clouds must reach a certain thickness, and it will not rain in a clear sky; Second, there needs to be a crystal nucleus, so that the water vapor in the air condenses into water droplets with the crystal nucleus as the core; Third, the temperature should be low, which can promote the condensation of water vapor into water droplets. The temperature is so high that even if it condenses into droplets, it will evaporate. When there is enough water vapor in the sky, the water in the sky is really lowered to the ground, and it is not allowed to run over in vain, which is artificial rainfall, but the more scientific name is artificial rainfall, and there are two methods of air and ground operations.

Aerial operations involve the casting of dry ice or silver iodide catalysts in a cloud of aircraft to condense water vapor into nuclei. Ground operations are carried out using anti-aircraft artillery and rockets launched from the ground. The cannonball is in the clouds**, and the silver iodide in the cannonball is burned into smoke and scattered in the clouds.

After the rocket reaches the height of the clouds, the silver iodide begins to ignite, and as the rocket flies, smoke is scattered along the way. Aircraft operations generally do not choose lightning and strong convective weather to ensure safety. Generally, anti-aircraft artillery and rocket operations are more extensive.

Artificial rainfall. In fact, it is not an increase, but a urge, it is necessary to have water vapor over the place where the rain is to be made, there are abundant cumulonial clouds, and the cloud layer is thicker, the cloud top height is between 6100 and 12200 meters, and there is a breeze of less than 10 kilometers on the ground.

On a cloudy day, there must be at least clouds before it rains, and secondly, there must be no lightning, because the lives of the staff are still the most important.

Only a certain amount of water vapor is allowed, and artificial precipitation enhancement is to provide condensation nuclei of water or reduce a certain temperature.

1. Conditions for artificial rainfall. Many people complain about the drought and why not do artificial rainfall. This is actually the biggest misunderstanding of artificial rainfall, artificial rainfall is not a feudal superstition, saying that it rains when it rains, in fact, artificial rainfall has prerequisites, if there are not enough water molecules in the air, even if more rain bombs are fired, it will not make the sky rain, at most it is light thunder and no rain, so what are the conditions for artificial rainfall?

In fact, it is very simple, first of all, there must be large water droplets in warm clouds with a temperature above zero degrees Celsius, and ice crystals in cold clouds with a temperature below zero degrees Celsius, otherwise even if the weather is good, no matter how thick the clouds are, there is no way to artificially rain, artificial rain is just a means of assistance, and cannot be made out of thin air.

Second, the principle of artificial rainfall. Now that we know the conditions of artificial rainfall, let's talk about the principle of artificial rainfall. When the concentration of water molecules in the air reaches a certain level, we can condense the water molecules in the air through artificial rainfall, so as to achieve rainfall, which is to release dry ice, silver iodide, salt and other components into the air to promote the condensation of water molecules.

Therefore, artificial rainfall can also be called artificial refrigeration, in which dry ice refrigeration is relatively simple to understand, when dry ice is launched into the sky, it will quickly sublimate and vaporize, during which it will absorb a lot of heat and promote the condensation of surrounding water molecules. Silver iodide is the afterglow decomposition, which will form a large number of macromolecular particles in the air, and the surrounding water molecules will condense with the silver iodide particles as the core, thus having a rainfall effect.

3. Artificial rainfall in China. At the beginning of the last century, the world attaches more importance to water resources, 18 countries in the world have begun to study artificial rainfall, among which China is one of the countries with a relatively large scale of experiments, after 1958, China has used aircraft to spray silver iodide and dry ice in the provinces to improve the rainfall in spring and winter, the effect is remarkable.

Artificial rainfall requires clouds in the sky so that there is enough moisture. Secondly, the weather should be windless, and the windless environment has less impact on artificial rainfall.

It is necessary that the number of clouds in the sky in the area reaches a certain standard, and the Meteorological Bureau provides complete equipment.

The required condition is that the warm clouds in the sky have water droplets above 0 and the cold clouds have ice crystals below 0. Without these conditions, even if you use silver iodide to rain, you will have little or no artificial rainfall.

A single artificial rainfall requires a large amount of dry ice as well as calculating the cloud thickness.

The conditions required for artificial rainfall are as follows:

1. Only when the cloud system develops to a certain thickness, this thickness is generally greater than 2 kilometers.

2. There should be a certain amount of supercooled water (water below 0 degrees without freezing) in the cloud.

3. The water vapor in the clouds is sufficient and there is an updraft.

One of the conditions for artificial rainfall is that there must be clouds. The second is to have the right cloud. Not all clouds can be, there are requirements for clouds, most of the time in summer is convective clouds, and the most vigorous development of convective clouds is cumulonimbus clouds, so cumulonimbus clouds are more suitable for artificial rain enhancement operations.

At the same time, in places with dense populations, many buildings, and frequent flights, it is not possible to implement artificial rain enhancement by launching rockets due to safety concerns. Launching rockets to artificially increase rain will promote convective activity in the clouds, which will then produce thunder and lightning, affecting the safety of flights, and the wreckage of the rocket will fall after the rocket is at high altitude, if it is in a place with high population density, the safety hazard will be great.

Artificial rain enhancement is not to create rain out of thin air, but to have clouds in the sky that are suitable for operation, and the meteorological department uses various means to retain the rain clouds that happen to be in transit and let it rain more.

According to the principle of meteorology, the generation of general natural precipitation not only requires certain macro weather conditions, but also needs to meet the microphysical conditions in the clouds, such as: there must be large water droplets in warm clouds above 0; There must be ice crystals in the cold clouds below 0, without this condition, no matter how good the weather situation is, no matter how good the cloud conditions, it will not rain.

When the conditions for artificial precipitation enhancement are met, artificial ice cores are sown into the clouds to produce condensation or condensation in the clouds, and then with the help of the natural collision process of water droplets, the rainfall can be produced or the amount of rainfall increased. Therefore, artificial rain enhancement is not "out of nothing", and must have certain conditions for clouds and water in the air.

Artificial rain enhancement is not artificial rainfall, it only increases the rainfall by 20 to 40 when it rains, and artificial rain enhancement cannot be implemented without rain clouds. The most ideal weather for artificial precipitation enhancement is that there are cumuliform clouds with abundant water vapor content over the operation area and thick clouds, the cloud top height is between 6100 m and 12200m, and there is a light breeze of less than 10 km per hour on the ground. There are various methods of artificial rain enhancement, including anti-aircraft artillery, rockets, and balloon spreading catalysts, aircraft spreading catalysts, and ground smoke burning.

Among them, aircraft are responsible for altitudes above 5,000 meters, and anti-aircraft artillery and rockets are responsible for mid-altitude altitudes of 3,000 meters to 5,000 meters.

Artificial rainfall is based on the physical characteristics of different clouds, choose the right time, use airplanes, rockets to sow dry ice, silver iodide, salt powder and other catalysts into the clouds, so that 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.

In other words, when it rains, use some means to make it rain, which is called artificial rainfall.

If it doesn't rain, use some means to make it rain, which is called artificial rainfall.

In fact, it is the same meaning, artificial rain enhancement and artificial rainfall are both artificial intervention in the rain. But there is a slight difference. Artificial rain enhancement is to make more rain when it is already raining.

Artificial rain is sometimes forced to rain when it does not rain at all.

This should be about the same, the difference is not big, the artificial gift means that your margin is relatively small, and then hit a rain cannonball into the sky, artificial rain means that he didn't rain.

Are artificial rainfall enhancement and artificial rainfall meanings completely different? Artificially increased and artificially rained means artificial rainfall. Increase the area covered with water. Artificial rainfall, it can only be. It is probably the same as artificial rainfall.

I think the meaning is completely different, and the former has rain but the latter is obviously no rain.

Artificial rainfall enhancement and artificial rainfall mean the same thing.

What are the conditions for artificial precipitation? Artificial rain is not "no middle life", it must have a certain air cloud and water condition. Generally speaking, the generation of natural precipitation requires not only certain macroscopic weather conditions, but also microscopic physical conditions in the clouds, such as 0°C in warm clouds, where there is a large water droplet in warm clouds; There is a crystal 0 ° C in the cold clouds, there is no such thing, the weather conditions are good, the cloud conditions are good, it does not rain.

However, in the case of nature, such microscopic physical conditions are sometimes unavailable; Sometimes although it has, it is not enough. The former does not produce precipitation at all; The latter is low. At this point, if an artificial ice core is used in the cloud, it can cause the cloud within the cloud to produce an ice-water conversion process, which can then produce or increase rainfall.

But not all clouds can be used to "broadcast", in general, low cloud families with Nimbostratus layers and levels, or Altostratus clouds with medium cloud families are more suitable; The clouds in a clear or clear sky are not thin. Artificial rainwater working conditions. When the cloud develops to a certain thickness, it is usually greater than 2 km.

In the clouds, there must be a certain amount of cold water (less than 0 degrees, no ice) and there must be updrafts in the clouds.

We carry the catalyst to the effective part of the cloud through ground artillery, rockets or airplanes, and it can play the role of artificial rain. After the implementation of artificial rain, it is usually effective after 5 minutes to 30 minutes, and the most intuitive effect is a significant increase in rainfall.

So does artificial rainfall have any effect on the climate? In terms of weather systems, during periods of extensive precipitation, weather systems are continuously complemented by upstream movement to downstream movements. As the updrafts change, the clouds are constantly updated.

From the rain side, artificial stormwater operations use clouds in clouds, and the cold water content of clouds is only one-tenth of that of water vapor, and rain surgery can only use very small portions of cold water. As a result, the effect of artificial energy on the water vapor in the clouds is very small, and there is no rainfall in the downstream areas.

The conditions for artificial precipitation enhancement are that there are condensation nuclei in the atmosphere that can be used as rainwater, such as some small dust, etc., and the humidity is also high, and the impact on the climate is almost none, only local rainfall.

In the case of artificial rainfall, there must be sufficient conditions, first of all, there must be enough water vapor, in addition, there must be a strong convective weather environment, and there are also certain requirements for clouds, and artificial rainfall can only be carried out when these conditions are met.

First of all, there must be a moisture environment in the first point, there must be an upward movement in the second point, and there must be this condensation nucleus in the third point to be able to rain. The use of artificial rainfall can change the climate, which is convenient for production and reproduction.

Conditions of artificial rainfall.

Artificial rainfall must have sufficient conditions. The generation of general natural precipitation not only requires certain macro weather conditions, but also needs to meet the microphysical conditions in the clouds, such as: there must be large water droplets in warm clouds above 0; There must be ice crystals in the cold clouds below 0, without this condition, no matter how good the weather situation is, no matter how good the cloud conditions, it will not rain.

However, 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 artificially 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 process of water droplets, rainfall can be produced or the amount of rain can be increased.

The role of catalysts in clouds is, to use a less precise analogy, like salt brine tofu, which enables precipitation that would not have been produced to increase the intensity of precipitation that has already been produced.

To put it simply: rainfall requires a large number of clouds in the sky, and then people can launch "condensation nuclei" or "catalysts" into the sky, which can cause large water droplets to form in the clouds, and the catalyst plays a role in lowering the temperature so that the large water droplets fall down, and rain is formed!!

Rain, snow, wind, ** are all natural phenomena, in the early days, ancient human beings, but also fantasized about a variety of creatures that manipulate natural phenomena, and now with the development of science, some natural phenomena have been able to be completed by artificiality, the most commonly heard is artificial rainfall.

1. Subjective conditions: protracted drought conditions require precipitation alleviation or continued scarcity of water resources, and there is a willingness to artificial precipitation.

2. Objective conditions: The generation of general natural precipitation not only requires certain macro weather conditions, but also needs to meet the microphysical conditions in the clouds, such as: there must be large water droplets in warm clouds above 0; There must be ice crystals in the cold clouds below 0, without this condition, no matter how good the weather situation is, no matter how good the cloud conditions, it will not rain.

There are clouds, dry ice, warm currents in temperature.

Rainwater work is based on meeting the required weather conditions, and the whole workflow is a very complex and systematic project.

But now the people understand this understanding, which is not a thoroughness, and often thinks that in the event of a drought, rockets are launched into the clouds, in fact, this understanding is one-sided, the so-called artificial rain, artificial rain, such statements, without precision. It is necessary to carry out artificial rain surgery, the main condition is that there must be clouds in the sky, which must also meet certain conditions, there is rain, not to become clouds.

The general stormwater operation plan is as follows: before artificial rainwater, we must carefully weather forecast through the weather system and strictly understand the local impact, scope, etc. with suitable working conditions. Once there are favorable working conditions, instructions will be issued to the working point to carry out rainfall work.

The presence of clouds is a prerequisite for homework, but it is not necessarily a successful job, it also needs to meet more specific weather conditions.

At the moment, in our country is a cold cloud of rocket man-made rainfall. Weather conditions are required: abundant water vapor and strong thermal convection.

Only under such weather conditions can the local implementation of artificial rain enhancement operations be effective, otherwise even the operation will be in vain. That is to say, the choice of when and where to carry out artificial rain enhancement operations still depends on weather conditions, and rain enhancement operations are still subject to weather conditions to a large extent. With a loud "boom", a rocket sprayed flames from the launch rack quickly, drilled straight into the clouds and then opened in the clouds, and a few minutes later, it began to pour rain in the sky.

The most ideal weather for man-made rain is when there is a water vapor content in the working area, thick clouds, a cloud top height between 6100-1200 meters, and a breeze on the ground of less than 10 km-h.

The main discussion is about the conditions for the implementation of artificial rain:

1. Sunny, cloudy weather can not rain. There were clouds in the sky, there was a heavy cloud. It was the best rain and the day was not good.

2. It is cloudy, it is raining, and the approval of the "air management" department must be requested before the artillery. Many times the rain conditions are ripe, but it is not possible to find "innumerable" applications, it will not be found, especially in areas with dense routes.