Can heavy rainy weather be artificially intervened?

From June 26th to 27th, a round of heavy rainfall approached Beijing -Tianjin -Hebei, and the accident was easy to cause the accident. Here, I warmly remind everyone to pay attention to safety and take precautions in advance. The rainfall in Beijing starts from the afternoon of the 26th, and the heavy rainfall is ended from 17:00 on the 26th to 14:00 on the 27th, and it ends around 20:00 on the 27th. It is expected that the cumulative rainfall can reach heavy rain and heavy rainstorms.

Many people start thinking about such a question: Now that the weather forecast technology has been able to predict heavy rain, can we "kill" the possible natural disasters that may occur in advance through manual intervention?

Precipitation can also be "stopped"

The water vapor in the atmosphere falls to the ground after condensing into a liquid or solid state, and meets several necessary conditions. First, there must be enough water vapor in the air. There must be more tuberculosis in China to promote water droplets and increase to the level that can land to the ground.

And the well -known manual rainfall (also known as artificial rainfall) is the necessary condition for the formation of artificially supplemented precipitation, prompting raindrops to form quickly, and land on the ground in advance.

There are "artificial rain" when there are artificial rains. In the actual operation, there are two ways to achieve the purpose of manual rain.

First, before the cloud group with water vapor reaches the destination, artificial rain increases in the upstream area of ​​the destination to let the rain finish in advance. It is the day when it is expected to rain. At this time, the water vapor has been consumed. Naturally, there is no rain. Another method is to keep the rain "sting". Because water vapor generally needs to be attached to the consolidation tuberculosis, it is condensed into a water droplet, so people often sow the condensate tuberculosis through the overwhelming amount in the clouds, so that the renovation content in the precipitation cloud group will be made. When the precipitation standard is 3-5 times, the water that can be "allocated" can be greatly reduced by each condensate, and a sufficient large water droplet cannot be formed to the ground.

The use of artificial rainfall technology can "book" a good weather for everyone when needed to ensure everyone's production and life more effectively.

Since rainfall can be "stopped", why is it not good for artificial rainfall technology to resolve flood disasters before it happens?

This is mainly because artificial rainfall is not a secret recipe for Bailing. Only by small and weak precipitation can it be played well. For heavy rain like last year, it is impossible to disappear through manpower to disappear them. Essence

First of all, let's understand a concept -auxiliary tropical tape. During the flow of high -temperature air near the equator, the heat continued to lose the heat, resulting in the sinking of the air. The high -pressure band formed by 20 ° ~ 30 ° north -south latitude was located in the subtropical region, so it was called a subtropical high -pressure belt. In previous years, the subtropical high -gas belt will stay between Henan Province and the ocean, blocking water vapor from the ocean.

Last year, as the location of the subtropical high -pressure stay was north of previous years, the southeast wind with a large amount of water vapor could be unobstructed to enter Henan. A cold air vortex that was originally staying along the coast also reached Henan. At the same time, the typhoon "fireworks" formed at sea. The water vapor absorbed during the formation of typhoons continued to enter Henan under the common effect of promoting the southeast wind and the attraction of cold air vortex.

When a large amount of water vapor entered Henan, when it continued to move north, it was affected by high pressure on the northwestern region of China, as well as the blocking of the special terrain of the Taihang Mountains and the Special terrain of the Taihang Mountains, and stayed in Henan for a long time, causing continuous high -intensity precipitation.

The two methods of artificial rainfall are nothing more than the possibility of rainfall the rainfall by letting the rain in advance or delaying rainfall. The rainfall technology resolves heavy rain. At this stage, it is still an irreplaceable task. Even if we have predicted that there is a heavy rain, all we can do can only be prepared for emergency response to flood disasters.

How to prevent disaster prevention and mitigation of manual intervention

In the face of the upcoming extreme weather, can we only have helplessness and wait for the occurrence of natural disasters?

of course not!

With the advancement of technology, artificial intervention weather has also played an increasingly important role in the process of disaster prevention and mitigation.

In all technologies that affect the weather, in addition to artificial rainfall and artificial rain, the most widely used technology is artificially anti -hail. By releasing a large number of hail embryo particles, a competitive relationship is formed with the natural hail embryo. The volume of a single hail is reduced. In this way, when the small hail enters an environment above 0 ° C, it will quickly melt into rainwater. Even if it cannot be completely melted, the degree of harm brought by hail to our living production activities will be greatly reduced.

In addition, there are artificial fog technology that improves environmental visibility. According to the temperature characteristics of the fog, the fog with a lower temperature can be released into an ice catalyst to quickly condense the water droplets in the air into ice crystals and drop to the ground. For warm fog with high temperature, it can accelerate the dissipation of dense fog by heating the air, putting moisture absorption, and enhancing air -to -flow. However, due to the factors such as technology and cost, the technology of artificial fog removal is still in the trial stage, and it is only applied in a few airports.

Since the 1940s, people have begun to try to intervene in the weather with modern technology. my country has also used artificial rainfall technology to relieve the drought ... Although it has eliminated the heavy rain disaster through manpower, it still seems to be at present, it is still still, it is still still, it is still still. A task that is impossible, but many things we are accustomed to now are just a "fantasy" that seem to be unable to achieve.It is believed that with the continuous development of meteorological science, more and more natural disasters will be destroyed in the bud.Creative Team: New Media Team of China Science and Technology Museum

This article comes from: China Digital Science and Technology Museum

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