Ozone – the bluish gas consisting of three atoms of oxygen (O3). When the ozone layer becomes thinner, to Earth the bigger quantity of the ultraviolet necessary for normal activity of people begins to get. Ozone absorbs an excess part of ultraviolet, including and dangerous to all live on Earth. Ozone holes are not a hole in the atmosphere in full sense. This slow steady reduction of concentration of a stratospheric layer.
Instruction
1. The number of contents in the atmosphere of ozone is not enough, and, so even the most insignificant aberrations of amount of ozone can lead to serious changes of intensity of impact of ultraviolet on the earth's surface. To warn about an ozone hole, remember the reasons in connection with which they can be formed: - compounds of chlorine known as freona. Even the unique atom of chlorine can destroy a lot of ozone layer; - fuel combustion. nitrogenit is dangerous protoxide for ozone; - high-rise planes. Nuclear explosions which are formed when flying also create problems about reduction of an ozone layer; - mineral fertilizers. In process of entering of mineral fertilizers into the soil the emergence of oxide of nitrous which promotes destruction of a stratospheric layer increases.
2. As you can see, sources of destruction of an ozone layer over the Earth's surface a huge set. So and the problems connected with ozone holes, too. Do not forget that the ozone layer in a stratosphere is extremely important for all live on Earth. Also remember, ozone holes how exactly appear: when there comes polar night, temperature sharply falls, and there is a formation of stratospheric clouds. They contain ice kristallik. When these kristallik accumulate too much, in the course of chemical reactions chlorine is released. Under the influence of ultraviolet rays, chlorine atoms get to the atmosphere. In the course of all these reactions the molecule of ozone (O3) breaks up and the molecule of oxygen (O2) is formed. Such chain of transformations naturally thins an ozone layer, as leads to formation of an ozone hole.
3. To learn in a possibility of emergence of an ozone hole, address to the ozonometric stations which are engaged in observation of an ozone layer. Planes laboratories allow to control origin of a hole and also its sizes and the nature of increase. For the first time faced a problem of decrease in level of an ozone layer over Antarctic in 1985. Photos of an ozone hole were the same year received.