Is there any artificial technology to keep out the rain?

First, carry out artificial precipitation enhancement operation to let the rain end ahead of schedule; The other is to spread too many ice cores into the cloud. When the amount reaches a certain level, the water absorbed by each ice core will decrease, resulting in the inability to form rainfall.

The above methods have little effect on large-scale heavy rainfall, but the current artificial hail suppression and fog elimination can still reduce some natural disasters and traffic accidents.

Artificial hail suppression is to artificially introduce sulfonated silver into hail clouds to compete with hail for moisture and inhibit hail growth. Artificial defogging is the artificial introduction of ice crystals or large water droplets to make the water droplets fall and dissipate.

principle

According to the physical characteristics of different clouds, choose the right time to spread dry ice, silver iodide, salt powder and other catalysts into the clouds by planes and rockets to promote cloud precipitation or increase precipitation. Artificial precipitation enhancement is divided into warm cloud precipitation enhancement and Leng Yun precipitation enhancement. In order to make warm clouds (clouds with temperature higher than 0℃) precipitation or increase precipitation, hygroscopic particles such as salt powder and urea should be sown in the clouds to promote the formation of large cloud droplets, which will lead to the formation or increase of precipitation.

If precipitation occurs in Leng Yun (cloud with temperature lower than 0℃), it is necessary to spread dry ice, silver iodide and other catalysts by plane to produce a large number of ice crystals, which will increase the density of ice crystals in the upper part of Leng Yun and promote or increase precipitation.

Under certain conditions, the microphysical process of artificially influencing clouds can stimulate clouds that can't naturally precipitation, and can also make those clouds that have more water supply and can often naturally precipitation, improve precipitation efficiency and increase precipitation. However, cloud energy that can't naturally precipitation can supply less water, so the economic value of artificial catalysis is limited.