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An experiment of nature, or truth about breaking up the clouds

May 18 2006

Nice, sunny weather in recent years surely accompanies all major metropolitan festivals: Victory Day, Independence Day, Day of the City. In this case, we often hear about the special aircraft that "dispersed" cloud in the sky over Moscow - the rain did not prevent VIP-guests and revelries. But what are the consequences of such intervention in the environment?

Hydromet specialists argue that the reagents used to disperse the clouds, do not harm the ecology of the capital. "Depending on the intensity of the projected future precipitation involve silver iodide, dry ice, and even Microfine cement. All of these agents - an environmentally friendly material without harming the atmosphere of the city "- an official state personnel.

The first attempts to make good weather were made in the Soviet Union, and today the Russian office to disperse the clouds is considered the best in the world. Other countries have so far only are adopting our experience.

The technique of creating favorable weather conditions has been developed by experts Roshydromet in 1990 and the beginning of the scale used in 1995. For the first time truly was tested at the celebration of the 50 th anniversary of Victory. Subsequently, the clouds dispersed for a period of opening and closing World Youth Games in 1998, while celebrating the 850 anniversary of Moscow.

The process of acceleration of clouds meteorologists called "seeding". Against the layered forms of the lower cloud layer with a height of several thousand meters of pulverized dry ice, but against nimbostratus cloud - liquid nitrogen. Silver iodide, which since meteopatrony bombard the most powerful rain clouds. Once in the cloud particle reagent concentrates moisture around them, "pulling" water from the clouds. As a result, over the area where spraying dry ice or silver iodide, almost immediately begins to rain. On the way to Moscow clouds already spent all the "ammunition" and spell.

Tactics acceleration produced in the last days before the holidays. In the early morning aerial reconnaissance clarifies the situation, after which one of the Moscow region (usually military) airfield fly planes with reagents on board. The cost of these missions can reach several million rubles, depending on flight time and consumption of expensive fuel. It is estimated that one event to create good weather costs the city treasury, a total of 2.5 million dollars.

In the dispersal efficiency experts and city guide Roshydromet convinced more than once. For example, several years ago on the Day of Moscow was under threat of a powerful high-altitude clouds and storm, told the service. Fully cope with such weather conditions is virtually impossible. Still, forecasters in tandem with the pilots failed 3 times to reduce the intensity of rain hanging over the capital.

Science has long been known technique to combat the rain clouds, but in practice it is used only in Russia. The technology of sputtering is quite simple and requires no extra costs. Say, the cloud of a length of 5 kilometers to a total of 15 grams of reagent.

In our country the monopoly of the "crackdown" cloud seeding owned department Hydrometeorology, and although the technology is already fairly well developed, it continues to impress foreigners. In particular, Japanese Prime Minister Koizumi Dzyunintiro invited to the celebration of one of the Victory Day on May 9, until the last moment was sure that the dispersal of the clouds above Moscow - no more than a joke.He was pleasantly surprised that during the parade on Red Square (contrary to preliminary forecasts of weather forecasters), the sun shone. Distinguished guest liked the achievements of Russian science in this area.

But envy the inhabitants of the capital, the sky over which can always "clean up" is not worth it. Head of Public Ecological Organization Ecodefense Vladimir Slivyak sure: "The artificial removal of natural rainfall over Moscow often leads to the fact that after pouring buckets of rain can be very long." It happens when the rapidly changing air humidity changes and movement of air fronts. This pattern was observed after the dissolution of the clouds above Moscow in honor of Independence Day of Russia - June 12, 2005.

"The relationship between dispersal of clouds and heavy rains there", - says Vladimir Slivyak. - "Do not disturb the natural balance of nature. In addition, modern science is still unable to talk about long-term consequences of such interference, as they may be very different. And because our position is: such actions must cease. "

According to the meteorologists themselves, all the talk about the negative aftereffects of reagents are not baseless. Head seeding Roshydromet Valery Stasenko said: "The findings of ecologists about what the rainy weather is a consequence of our actions are nothing more than speculation ... We are aware of the existence of periods of clouds, known patterns of precipitation and precipitation formation. The reagent exists in the atmosphere less than a day. After falling into a cloud, he washed out of him along with precipitation - are sure meteorologists.

However, after every holiday, which was dry and warm weather, come a few days, during which are unusually heavy rains. Still Nature does not like to interfere in its affairs ...

On materials of the Russian press and

Константин Дятлов

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