Sound is how scientists in China manipulate the weather. It is enough to turn on the low-frequency sound loudly and wait for the rain to fall.
Chinese scientists say that music not only soothes manners. It can also make it rain. Although I exaggerated with this music, it is about specific wavelengths of sound.
Sounds ridiculous, but it’s true. An experiment conducted by Chinese scientists in the Tibetan Plateau caused rainfall in the area to increase by 17 percent. So the result is quite tangible.
The experiment was not too complicated: researchers from a team led by Wang Guangqian at Tsinghua University in Beijing aimed a large loudspeaker at the sky and began to play low-frequency sounds on it. The exact principle of causing rain with sound waves is not yet known, but scientists assume that acoustic waves can help water molecules to fuse into larger droplets, thereby increasing the chance of rainfall.
All you need is a sufficiently powerful loudspeaker. For the experiment in the Tibetan Plateau, a set emitting sounds with a frequency of 50 Hz was used, i.e. on the border of the lower threshold of human hearing, with a volume of 160 dB. For comparison: the approximate volume of a rifle shot is 150 dB, and the launch of a space rocket is 190 dB. In short: it was loud.
The plans of the Chinese government assume that by 2035 China will develop effective methods to modify weather phenomena. It is mainly about causing rain to revitalize rural regions and rebuild damaged ecosystems in the Middle Kingdom. The experiment carried out by scientists from the Tsinghua University in Beijing fits in perfectly with this strategy – the current methods of generating rain are, to put it mildly, quite invasive when it comes to ecosystems.
Typically, for seeding clouds, the method of spraying (from the ground and from the air) such chemical compounds as frozen carbon dioxide (dry ice), silver iodide and sodium chloride (i.e. salt). The last two substances are not indifferent to the environment, and in addition, when we are talking about large-scale operations, the methods used so far generate much more costs than a few speakers aimed at the sky.
Research in search of methods for cheap and effective rainfall sounds quite absurd. However, if we place them in today’s climate context, this absurdity begins to disappear. Let us take, for example, the statistics about our country: in the 1980s, an average Pole had approximately 2,500 m3 of water per year. Currently, this index rarely exceeds 1,800 m3. Two issues are responsible for its decline: the increasingly warmer summer periods and the topography in our country.
To make matters worse, there is a belt running through the Lubuskie, Dolnośląskie, part of Wielkopolskie, Łódzkie and Mazowsze provinces to the Lublin region, where we have the lowest rainfall in our country every year. Combined with the rising temperature (and more water evaporation) and large-scale agriculture, this mixture is a very simple recipe for disaster.
I would also like to remind you that in the first half of June 2019, there was no water in Skierniewice. Imagine suddenly that absolutely nothing happens in your city for two days after turning on the tap. And for such an eventuality, it is good to have an appropriate set of speakers that can be aimed at the sky in order to cause rain.