Do greenhouse gases, which are the official, though not recognized by all opinion is the main factor causing global climate change, there is another competitor — the cosmic rays.
Opponents of the official point of view for a long time say there are at least centuries of close correlation between solar activity and global temperatures — moments of maximum coincides with the warm years and vice versa. But so far, most looked at this relationship as a coincidence, since, according to calculations, the fluctuations can change the brightness of the sun the earth's temperature by only a few hundredths of a degree. Henrik Svensmark recently (Henrik Svensmark) from the National Space Institute in Copenhagen, suggested another, indirect mechanism of solar influence on the weather.
According to his hypothesis, cosmic rays contribute to the emergence of low clouds that keep the Earth from the sun part of the ongoing energy. During periods of maximum solar activity, its magnetic field deflects more cosmic rays, not allowing some of them to the ground, and therefore produce less clouds. Now a group of Danish and French scientists led by Svensmark filed experimental evidence that cosmic rays can actually contribute to water droplets, ionized water vapor molecules and causing them to condense.
In a 50-liter stainless steel chamber they put a gas mixture simulating the earth's atmosphere — oxygen, nitrogen, traces of water vapor, sulfur dioxide and ozone — and then started shooting the mixture by an electron beam with an energy of 580 MeV. They found that when exposed to the beam on the sample placed in a chamber formed a much larger number of clusters of gas of not less than 3 nm, than those without such exposure. Similar results are achieved by placing the camera in radioactive materials.
To finally prove the link between cosmic rays and cloud formation, it is necessary to obtain a cluster size of about 100 nanometers, because that's around these particles of condensed water vapor in the real atmosphere. Scientists are going to make it to the CERN installation CLOUD, where you can work with a capacity of 26 m3. Will also have a more detailed study of the mechanism of the influence of cosmic rays on global temperatures, because in the real atmosphere connection is not so simple. But that's done — and proven that cosmic rays in the atmosphere accelerate the birth of water droplets.