Is it artificial rainfall in Shenzhen?

Weather modification has been the ideal of human beings since ancient times. /kloc-at the end of 0/7, China's "Yang Guang Miscellaneous Notes" in the Qing Dynasty contained: "There are often storms in May and June in summer. When Huang Yun comes down from the mountain, there will be hail. When the natives see yellow, they will ring the golden drum, fire a gun at it and disperse. " This is a vivid description of hail suppression by ancient earth cannons in China.

In the study of weather modification, artificial precipitation enhancement is the most widely carried out. Some rigorous experiments show that under certain conditions, the precipitation of 10 ~ 20% can be increased by Leng Yun catalysis. There are also some experiments whose results are not significant. In some cases, the precipitation has decreased. There are few experiments on warm cloud catalysis, and the technology is immature. The scale of artificial hail suppression is second only to artificial precipitation enhancement. The technology of eliminating supercooled fog with dry ice or liquefied propane has been put into operation in some airports. Eliminating warm fog, artificially reducing typhoon and artificially suppressing lightning are still in the exploration and test stage.

Experiments of weather modification have been widely carried out in some countries. With the deepening of experimental research, the complexity of this work is gradually realized: ① Weather modification must have certain natural conditions, such as supercooled water droplets in the clouds, in order to make Leng Yun catalysis work;

(2) Because the dynamic process and microphysical process in the cloud are very complex and interact with each other, the same sowing method may produce completely different effects under different natural conditions, and the sowing results in different occasions are often very different;

(3) Because the natural variability of weather phenomena is very large, and the change caused by artificial seeding is very small, it is difficult to distinguish man-made change from natural change (that is, effect test). Therefore, people often have different views and evaluations on the actual effect of weather modification.

Everyone pinned their hopes on the magical artificial precipitation enhancement "washing the sky and removing haze". Bian Xiao wants to say that precipitation enhancement can't be increased if you really want to increase it. Meteorologists need to track meteorological data for a long time to find a suitable time for artificial precipitation enhancement. Today, I will tell you why artificial precipitation enhancement is not easy.

From the perspective of harmony between man and nature, man can't control the weather. Only by observing and understanding the weather system and mastering the laws of weather changes can we influence the weather, so as to seek advantages and avoid disadvantages. Artificial precipitation enhancement is one of the ways to artificially influence the weather.

As the saying goes, a clever woman can't cook without rice. Similarly, artificial precipitation enhancement is impossible without corresponding conditions. An important prerequisite for artificial precipitation enhancement is that there should be rainfall conditions in the sky. When a suitable rainfall cloud system appears in the weather process, the original precipitation can be increased by artificial intervention and catalysis, but its core is still achieved by natural precipitation.