Understanding the ozone hole 5, understanding the ozone hole

Now some uninhabited deserts have ozone holes, and the sun's ultraviolet rays will shoot directly into the earth. If it is light, you will get **cancer, and if it is serious, you will die!! Use less freon, it can wreak havoc on the ozone layer! Without an ozone layer, it's terrible!! 1

1. It is widely used as a refrigerant.

HCFCs in chemical preparations such as sprays and blowing agents.

It is the "main culprit" that causes the reduction of ozone.

2. Solar activity.

Around the peak year of solar activity (i.e., the period of strong solar activity), cosmic rays are significantly enhanced, which prompts the chemical reaction between two-electron nitrides (such as NO2) and O3, resulting in an increase in odd-electron nitrides (such as NO3) and the conversion of O3 to O2, thereby destroying the ozone layer.

3. Some atmospheric chemical reaction can be produced in the ozone layer, which decomposes ozone (O3) with the content of three oxygen atoms into molecular oxygen (O2) and atomic oxygen (O), thereby destroying the ozone layer.

Impact on humans.

1. Squamous cell carcinoma.

And basal cell carcinoma — is the most common ** cancer, and is exposed to high-energy ultraviolet light.

Irradiation is very closely related. Ultraviolet light makes DNA molecules.

The bases in pyrimidine form dimers, resulting in errors in DNA replication.

2. Cataract.

Experimental studies have shown that ultraviolet light is associated with the incidence of cataracts. Long-term exposure to sunlight is associated with an increased incidence of cataracts, which affects men more than women.

The above content refers to Encyclopedia - Ozone Hole.

There are three explanations for the formation of the Antarctic ozone hole, namely the explanation of atmospheric chemical processes, the influence of solar activity and the explanation of atmospheric dynamics.

1. Atmospheric chemistry regulations explain atmospheric chemical processes, and it is believed that the ozone layer can produce some kind of atmospheric masking reaction, which decomposes ozone (O) with the content of three oxygen atoms into molecular oxygen (O) and atomic oxygen (O), thereby destroying the ozone layer.

2. Explanation of the influence of solar activityThe explanation of the influence of solar activity is that when the peak year of solar activity is revealed, the cosmic rays are significantly enhanced, which promotes the chemical reaction between the two-electron nitride (such as NO) and O, so that the odd electron nitride (such as NO) increases, and O is converted to O.

3. Atmospheric dynamics explanationThe atmospheric dynamics interpretation believes that in early spring, at the end of the polar night, solar radiation heats the air, produces an upward motion, and inputs the air with low tropospheric ozone concentration into the stratosphere, which reduces the ozone content of the troposphere and makes it easy to appear ozone hole. Among the human factors, it is generally believed that the heavy industrial use of Freon gas is one of the main causes of ozone layer destruction.

Damage to human health: damage to the cornea and lens of the eye, causing diseases such as cataracts; Induce **cancer and other ** diseases including melanoma and reduce the body's immunity. Resulting in reduced crop yields

Beans, melons, fruits, and vegetable crops were strongly affected by purple sweet potato preparation, and a large number of chain lifts reduced yields. Harm or even kill marine life: Excessive UV radiation reduces the amount of plankton in shallow waters, further leading to the death of fish and shellfish, and damaging entire aquatic ecosystems.

1. Damage to human health: damage to the cornea and lens of the eye, causing cataract and other diseases; Induce a number of cancerous and other diseases including melanoma, and reduce human immunity.

2. Cause crop yield reduction: beans, melons, fruits and vegetable crops are greatly reduced by strong ultraviolet rays.

3. Harm or even kill marine life: Excessive ultraviolet radiation reduces the number of plankton in shallow waters, further leading to the death of fish and shellfish, and damaging the entire aquatic ecosystem.

An ozone hole is an ozone gap caused by the loss of ozone concentrations in the stratosphere.

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 atmospheric environmental problem of general concern in the world, which is directly related to the safety of the biosphere and the survival of human beings.

Regarding the formation of the hole in the ozone layer, the dominant thing in the world is the chemical hypothesis of human activity:

Chlorofluoroalkane chemicals (such as refrigerants, blowing agents, cleaning agents, etc.) used in large quantities by humans are not easy to decompose in the troposphere of the atmosphere, and when they enter the stratosphere, they are exposed to strong ultraviolet rays to decompose to produce chlorine free radicals, which react chemically with ozone to reduce ozone concentration, thereby causing serious damage to the ozone layer.

Causes of the Antarctic ozone hole

There are four theories about the causes of the Antarctic ozone hole:

1.Chlorine-containing compounds produced by human activities enter the atmosphere under human influence.

2.A natural phenomenon related to the cycle of solar activity.

3.Regional weather dynamics.

4.Volcanic activity.