How much is a rain bomb for artificial precipitation enhancement?

How much does it cost to launch an artificial rain bomb? The principle of artificial precipitation enhancement is that when there are rain clouds in the sky, silver iodide shells fired by rockets explode in the clouds, prompting tiny raindrops in the clouds to collide and condense, eventually forming large raindrops. The value of a rain bomb is about 4000 yuan, plus the labor cost and the use cost of the launch vehicle, which is about 6000 yuan.

The principle of artificial precipitation enhancement is to artificially make rain clouds rain by scientific means. The first condition of artificial rainfall is that there must be rain clouds over the area where it is going to rain, otherwise it is no use having shells without rain clouds. The specific method is to shoot the shells containing chemicals into the high-altitude clouds with rocket launchers. The shock wave and volatile medicine produced by the shell explosion will promote the collision and condensation between small water droplets in the cloud. When the water droplets condense to a certain weight, they will fall down to form rainfall.

Can the principle of artificial precipitation enhancement be popularized? Trigger mechanism? To describe it in four words, it is to artificially trigger the natural precipitation mechanism on the basis of fully studying the natural precipitation process. Clouds can bring rain, but not all clouds have the potential for precipitation. Only those clouds with precipitation potential and the possibility of development and utilization (clouds are rich in water resources and thick, so for Leng Yun, they are mainly rich in supercooled water areas) can catalyze rainfall.

At present, there are three catalytic operation modes:

l？ One is to arrange AgI combustion furnace on the ground as the main means. The catalyst is transported to the cloud by the common updraft on sunny slopes in mountainous areas within a certain period of time. The advantage of this method is economy and simplicity, but its obvious disadvantage is that it is difficult to determine the amount of catalyst entering the cloud. This method is mainly suitable for mountainous areas with frequent development of topographic clouds and inconvenient transportation. l？ The second is ground operations based on anti-aircraft guns and rockets. Due to the successful development of extended-range flame-retardant artillery shells and flame-retardant rockets, the problem of transporting the catalyst to the right cloud part at the right time and according to the required dose has been basically solved. Its disadvantage is that although the existing vehicle-mounted rocket equipment can move within a certain range, compared with the aircraft, its maneuverability is still poor, and it is suitable for working in fixed target areas (such as adding water to reservoirs), especially for strong catalytic operation of convective clouds that threaten the flight safety of aircraft. WR- 1B rocket operation system for artificial precipitation enhancement and hail suppression is the only rocket operation system recognized by the national people's government at present. It uses China Meteorological Institute BR-9 1-Y efficient silver iodide flame agent to produce composite ice core aerosol containing AgI, with high nucleation rate and performance index higher than that of related products in the United States and CIS. l？ The third is the catalytic operation of aircraft. Aircraft catalytic operation has a wide range. According to different cloud conditions and needs, we can choose warm cloud catalyst and its sowing device, refrigerant and its sowing device (such as dry ice and liquid nitrogen), or mount Agl combustion furnace and aircraft flame bomber launching system. It can also be loaded with detection instruments to observe the microstructure of the cloud and track and monitor the macro-micro state changes of the cloud before and after catalysis. But not all clouds can be used? Rain? Yes, generally speaking, nimbostratus of low cloud system and stratocumulus or high stratocumulus of middle cloud system are more suitable; Under the condition of partial cloudy or clear sky, it is impossible to carry out artificial precipitation enhancement by aircraft. Whenever there is a drought, it is easy for everyone to think, why does the country have such technology and not do it? First of all, I want to tell you that weather modification requires certain weather conditions, and neither sunny days nor thin clouds in the sky have the conditions for artificial precipitation enhancement. Only when the cloud system develops to a certain thickness, generally more than 2 kilometers, there must be a certain amount of supercooled water (water without freezing below 0 degrees) in the cloud, and there must be an updraft in the cloud, can we carry the catalyst to the effective part of the cloud through anti-aircraft guns, rockets or planes on the ground, and can we play the role of artificial precipitation enhancement. However, there are few weather processes of artificial precipitation enhancement during drought.

Compared with drought resistance after rain, the cost of launching a rain bomb is not high. Because the value of a rain bomb is about 4000 yuan, plus the labor cost of using rocket launchers, rocket launchers and soldiers who come to launch, it is generally more than 6000 yuan. In contrast, it will be more expensive to spread coolant in the cloud by plane to make the water droplets in the cloud condense and increase to form rain. It costs more than 4 million yuan every time the plane is dispatched in the rain, and the value of coolant scattered in the clouds reaches several hundred thousand yuan.

The cost of artificial rainfall is not fixed. In fact, when artificial rainfall is actually implemented, it is impossible to completely control the cost whether it is launching artillery shells or spraying coolant on airplanes. Because the reality is very complicated, different chemicals will be used because of different cloud temperatures, and the range, humidity and wind direction of clouds will affect the rainfall effect, so a truly successful rainfall needs a series of tests and calculations, which will often lead to cost overruns in the end.