After so long, why can't you increase the rain artificially?

What is "artificial rainfall"?

Before understanding artificial rain, we first need to know -where is the rain come from?

The rain is a drop of water dropped from the cloud. The water on the land and the surface of the ocean evaporates into water vapor. After the water vapor rises to a certain height, it will become a small droplet. These small water droplets form the cloud. Drop, when it was so large that the air couldn't support it, it fell from the clouds, forming rain. Therefore, in order to form rainfall, three conditions must be met. Water vapor in clouds, rising air flow, and sufficient coagulation tuberculosis or ice nuclear nuclear.

Artificial rainfall is a process of influencing the micro -material process of cloud under the method of manual intervention under appropriate weather conditions, thereby achieving the purpose of increasing ground precipitation. The manual rainfall method is to scatter the catalyst (salt powder, dry ice or silver iodide, etc.) to the cloud, and can also use sound waves, femtosecond lasers, charged particles and other means to promote the transformation process of water vapor condensation, cloud dripping and growth, etc. Formation of precipitation falls to the ground.

Therefore, artificial rainfall does not mean artificial rainfall. The role of catalysts is like "brine tofu". Only when natural clouds meet the conditions for rain increase operation can manual rainfall can play a role.

Isn't it to increase artificially and rain?

The clouds at the high altitude include the cold clouds (the temperature in the clouds is below 0 ° C) and the warm cloud (the temperature in the cloud is above 0 ° C).

For the artificial rainfall of Lengyun, the traditional method is usually to sow iodide, silver, and dry ice, etc., to increase the concentration of ice crystal in the cloud to make up for the lack of ice nucleus in the cloud, and to achieve the purpose of rainfall or increased rain.

The artificial rainfall of the warm cloud is usually anecades with salt powder such as salt powder in the cloud, so that a group of large cloud droplets quickly form a large cloud drip in the cloud. Naturally warm clouds increase rainfall.

But artificial rainfall does not want to increase if you want to increase!

First of all, there is rain with rain, but not all clouds have precipitation potential. The cloud of artificially raining needs to meet three conditions, and the thickness of the cloud layer is greater than 2 kilometers; water vapor must be charged in the cloud; Generally speaking, the accumulated clouds and layers of clouds are not easy to produce precipitation, while the accumulated rain clouds (hybrid clouds coexisting in ice water) are more conducive to the growth of cloud droplets to raindrops.

Therefore, some time ago, it continued to be high temperature. Chongqing and other places were "clear in the sky, no clouds", and naturally did not meet the conditions for artificial rainfall.

How to "increase" artificial rainfall?

In terms of rainfall operation methods, the conventional is to sow the clouds and sprinkle catalysts to the cloud through aircraft, high guns, rockets, and ground burning furnaces. Generally speaking, the ground burning furnace is mainly used in mountainous areas with inconvenient transportation or areas that are more difficult to apply for operating airspace. The operators send artificial ice nuclei into the cloud through combustion of flames containing catalysts.

Aircraft operations can carry catalysts and sowing devices or mount aircraft flame bomb launch systems according to different cloud layers and needs to carry out rain increase operations at the appropriate cloud layer location. In addition, the aircraft can also be loaded with the observation of cloud micro -structures and tracking and monitoring of changes in Yunhong and micro -state before and after catalysis.

Compared with the aircraft, high guns and rockets have poor maneuverability and are suitable for operating in fixed target areas (such as reservoir water), especially the stream cloud that threatens aircraft flight safety.

At the same time, in my country to implement manual affecting weather activities, we must strictly abide by relevant laws, regulations and specifications, and abide by strict manual affecting weather operation standards. For artificial rainfall, aircraft, rockets, and artillery must apply for operational airspace before rain increase operations, and strictly launch artificial rainfall rockets and shells in the approved airspace to ensure operation safety.

- END -