Where are the ozone holes currently distributed in the world?

Over the North and South Pole regions.

The ozone hole was first discovered in 1985. In 1984, scientists found that the concentration of ozone in the ozone layer over Antarctica was 40% lower than that in the mid-70s of the 20th century, which could no longer adequately block excessive ultraviolet rays, resulting in a "hole" in this special circle of life. In 2000, the ozone hole over Antarctica covered a record 28 million square kilometres, the equivalent of four Australias.

In 2012, the ozone hole over Antarctica became smaller, and in recent years it is said that it has been shrinking year by year.

There is also an ozone hole in the Arctic. In 2011, satellites discovered a clear ozone low zone over the Arctic, in which the total amount of ozone was about half of the normal average, which is also considered an ozone hole. But I haven't heard of it in recent years.

This will happen in the skies over the North and South Poles.

The ozone hole refers to the destruction and reduction of the ozone layer in the atmosphere due to the diffusion and erosion of air pollutants, especially aerosol pollutants such as nitrogen oxide and halogenated hydrocarbons.

Due to the reduction of ozone in the ozone layer, the ultraviolet rays of sunlight reaching the ground are enhanced, in which ultraviolet rays with a wavelength of 240 329 nanometers have a strong killing effect on biological cells. Since the 1970s, ozone has been decreasing at a rate of 4 per decade, and the main reason for ozone depletion is the catalysis of ozone by chlorides and bromides, which are mainly released from ground-level Freon.

The depletion of the ozone layer in the atmosphere is a global environmental problem of general concern in the world, which is directly related to the safety of the biosphere and the survival of human beings. Scientists believe that the main reason for the small size of the ozone hole is the climate, not because of the reduction in the emission of chemical gases that destroy the ozone layer. British Antarctic expeditionary scientist Asan Ranran Roger said the shrinking ozone hole over Antarctica should be seen as an isolated phenomenon in historical history.

As a result, the area of the ozone hole is likely to widen.

Causes of ozone holes

Through tracking and monitoring, scientists have found the cause of ozone layer depletion, the formation of the ozone hole. A type of HCFC, which is used in large quantities as a chemical agent such as refrigerants, sprays, blowing agents, etc., is the "main culprit" responsible for ozone reduction. In addition, cold is also the key to the thinning of the ozone layer, which is why the ozone hole appeared in the coldest regions of the Earth's North and South Poles in the first place.

Some of the substances emitted into the atmosphere by human activities enter the stratosphere and react chemically with the ozone there, which leads to ozone depletion and reduces ozone concentration. Anthropogenic ozone-depleting substances are mainly chlorofluoroalkanes (CFXCL4-X, also known as FRon), which are widely used in refrigerator and air conditioning refrigeration, foaming foams, and electronic device cleaning, and bromofluoroalkanes (CFXBR4-X, also known as HALONS) used in special occasions to extinguish fires.

The above content refers to Encyclopedia - Ozone Hole.

The ozone layer appears over the north and south of the region. The ozone hole is an airspace in the stratosphere of the atmosphere where ozone concentrations are greatly reduced, which can adversely affect ecosystems in the biosphere and all kinds of organisms, including humans, by increasing the amount of ultraviolet sunlight that hits the ground.

In 1984, British scientists discovered the first ozone hole over the coarse pole of the South Cavity, and the area of the hole has now spread over most of Antarctica.

The Arctic ozone hole is mainly formed by the rare and prolonged winters in the Arctic, and at one point moved over eastern Europe, Russia and Mongolia.

Ozone Xiangyuan early layer cavity refers to the phenomenon of the destruction and reduction of the ozone layer in the atmosphere due to air pollutants and other reasons.

You've probably heard of itOzone layerIt's thinning this thing, or rather, inAn ozone hole has emerged over Antarctica, which will allow the sun's ultraviolet rays.

The more intense, it is easy to get a sunburn.

ThatWhat exactly is the ozone layer? How is the ozone hole formed?

Ozone layerRefers to the earthAtmosphereof the stratosphereMediumThe part with a relatively high ozone concentration, the main role is:Absorbs ultraviolet rays, 90% of ozone is concentrated in the stratosphere. In a sense,Ozone is earthlySunscreenMost of the ultraviolet rays in the sunlight are filtered out by the ozone layer in the stratosphere.

Ozone is a type of oxygen that is made up of three oxygen atoms.

The composition of the gas, in fact, isA variant of oxygen, the formation mechanism is that after the oxygen molecule absorbs sufficient high-energy ultraviolet rays, and thenDecomposes into two oxygen atoms, and then these two oxygen atomsThey merge with normal oxygen molecules to form ozone

Ozone is a type that hasFishy-smelling blue gasis in natureThe strongest oxidizing agentand also has a good oneDisinfection and sterilization, often inUsed in industry and medicine**

If ozone does not deplete the ultraviolet rays, thenEarth creatures will be susceptible to sunburnand at the same timeSuffer from a lot of ** diseases, the eyes are often burned; Plants will also not be easy to surviveCrop yields will also be much lowerTherefore, ozone is so important to the planet.

So why does the Antarctic ozone disappear in the Earth, creating an ozone hole? This is due to a combination of several reasons.

First of all,Strong Antarctic winds bring air convection, some substances that can deplete the ozone layer (egCompounds of chlorine and brominewas taken over Antarctica, plusThe temperature in the Antarctic stratosphere is very low, under the action of these two factors, formedVery special polar stratospheric clouds, which will be enormoushinders the formation of ozoneSo at times,Ozone simply does not have the conditions to form over AntarcticaOver time, the hole in the ozone layer is formed.

But when the end of spring rolls,The Antarctic vortex blows some of the chlorine and bromine into itSouthern HemisphereOther regionsAt this time, the sky over Antarctica will start to return to normal, and some ozone will also start to be producedThe hole in the ozone layer also heals slowly

However, in recent years, AntarcticaThe hole in the ozone layer is getting biggeralreadyChanges in the natural climate cannot be blamed solely on themup, humanIndustrial activity has become the main cause, emitting more and more ozone-depleting chemicals, such as:Chlorofluorocarbons, this kind of refrigerant, as a refrigerator, can break fast100,000 times its ozone

The hole in the ozone layer was measured in 1987Reached the largest in history, this is itIt has attracted the attention of the scientific community and countries, and then inIn 1987, many member states of the United Nations signed the Montreal Protocol on Substances that Deplete the Ozone LayerIn 1996, it was decided to completely cease production and use chlorofluorocarbons, and the rate of ozone layer depletion had slowed down considerably in recent years.

Ozone in the atmosphereThere may be a long way to go to get back to the best level, but at least indicateAs long as the whole world pays attention to the ozone layerProtecting the ozone layer will surely win.

Because the environment is particularly badly damaged, there is more carbon dioxide in the air, which leads to the hole in the ozone layer.

This is because the environment is being particularly damaged, and people are cutting down indiscriminately and not protecting the environment, and they are also affected by global warming.

This is the case because global warming has become more severe, coupled with the overuse of CFDs.