As reported in the scientific journal Nature, Dr. Michel Santi (Dr Michelle Santee) and his colleagues at NASA's (Nasa's Jet Propulsion laboratory), the thickness of the ozone layer in the Arctic has reached record lows. At altitudes of about 20 kilometers, it decreased by as much as 80 percent. In essence, a "ozone hole" in the place where previously there was none.
"Ozone hole" over Antarctica usually appears — in the Southern Hemisphere. In the North — this phenomenon has always looked so small that it did not pay attention. But now thinning was just weird. And there was a hole in the Arctic, comparable in scale to the Antarctic.
Experts scare that of holes in the layer which protects the Earth from ultraviolet radiation hard, may suffer and people and animals — will receive skin burns and eye damage.
Scientists suggest that the anomaly is associated with a very low temperature, which was established in the stratosphere. On such a cold snap a few years ago warned the Intergovernmental Panel on Climate Change at the UN. Assured that it is from 1979.
A colder in the stratosphere, the more are substances destroying ozone in the layers closer to the Earth. But it is — just a hypothesis. From what exactly occurred, the present "hole", a spectacular Canada and Russia, is not known.
It is possible that she — "ozone hole" over the Arctic — something to do with very cold winters, followed one after the other. But what is the root cause, again not clear whether, having appeared, aggravated cold. In the latter case, the approaching winter threatens again become severe in our — the Northern Hemisphere.
It is considered that the main destroyers of the ozone layer were called chlorofluorocarbons (CFCs). These substances are banned. But the best of ozone does not seem to become. Why?
U.S. researchers have found a strong destroyer — the so-called laughing gas — nitrous oxide. And it is possible that this substance is destroying ozone instead of CFCs.
Moreover, it was found that CFCs prevent laughing gas to deplete the ozone layer. Today, the "noise" is almost gone.
Nitrous oxide — a result of global warming. So say researchers led by Maya repurchase of the Finnish University of Kuopio.
Measurements have shown that laughing gas seeping out of the marshy areas of the Russian Arctic. Powerful its sources — circles peat. Each of the square meter emits at 1.2 grams per season. This is much more than that or else on the planet. In terms of natural resources. A square with "amusing" circle occupies about 20 percent of the area in the north of Russia. For example, in the Republic of Komi. And further along the coast of the Arctic Ocean. In other words, the expected delivery of millions of tons of laughing.
Scientists believe that intensive gazovat began bacteria, which convert nitrates — nitrogen compounds are not assimilated by plants. If things go on like this, and it will go — the permafrost melts, turns into a swamp, it will be more fun to live not only in Russia. Wind will spread joy gas on the planet. But by no means universal laughter frightens researchers. The main danger they see is that nitrous oxide is a greenhouse gas. And he makes a powerful contribution to the process of global warming. Persists in the atmosphere for over 110 years. That is 10 times longer than methane — another greenhouse gas that oozes out of the tundra.
Now let's add one more attack — the ozone hole. And just over the Arctic. Is it not proof that there has already worked laughing gas?