what is ozone layer is all about?

Answer 1

The ozone layer is a part of the atmosphere that blocks harmful ultraviolet (UV) radiation from the Sun. Ozone is a molecular form of oxygen, O3 rather than the usual O2 oxygen gas, and the ozone layer contains more ozone than other parts of the atmosphere. The current problem with the ozone layer is that manmade chemicals can enter the atmosphere and react with the ozone, removing it from the ozone layer, and allowing more UV radiation to penetrate to the surface, which it can negatively impact people. UV radiation causes sunburn, and at sufficient levels of exposure it also causes skin cancer. Thus, ozone depletion is a significant problem that mankind has the capacity to solve by eliminating usage of the products that produce the harmful reactants, called "free radicals."

Answer 2

The ozone layer, or ozonosphere layer (rarely used term), is the part of the Earth's atmosphere which contains relatively high concentrations of ozone (O3). "Relatively high" means a few parts per million - much higher than the concentrations in the lower atmosphere but still small compared to the main components of the atmosphere. The ozone layer was discovered in 1913 by the French physicists Charles Fabry and Henri Buisson. Its properties were explored in detail by the British meteorologist G. M. B. Dobson, who developed a simple spectrophotometer that could be used to measure stratospheric ozone from the ground. Between 1928 and 1958 Dobson established a worldwide network of ozone monitoring stations which continues to operate today. The "Dobson unit", a convenient measure of the total amount of ozone in a column overhead, is named in his honor.
http://en.wikipedia.org/wiki/Ozone_layer

Answer 3

The ozone layer, or ozonosphere layer (rarely used term), is the part of the Earth's atmosphere which contains relatively high concentrations of ozone (O3). "Relatively high" means a few parts per million - much higher than the concentrations in the lower atmosphere but still small compared to the main components of the atmosphere. The ozone layer was discovered in 1913 by the French physicists Charles Fabry and Henri Buisson. Its properties were explored in detail by the British meteorologist G. M. B. Dobson, who developed a simple spectrophotometer that could be used to measure stratospheric ozone from the ground. Between 1928 and 1958 Dobson established a worldwide network of ozone monitoring stations which continues to operate today. The "Dobson unit", a convenient measure of the total amount of ozone in a column overhead, is named in his honor.

Origin of ozone
The photochemical mechanisms that give rise to the ozone layer were worked out by the British physicist Sidney Chapman in 1930. Ozone in the earth's stratosphere is created by ultraviolet light striking oxygen molecules containing two oxygen atoms (O2), splitting them into individual oxygen atoms (atomic oxygen); the atomic oxygen then combines with unbroken O2 to create ozone, O3. The ozone molecule is also unstable (although, in the stratosphere, long-lived) and when ultraviolet light hits ozone it splits into a molecule of O2 and an atom of atomic oxygen, a continuing process called the ozone-oxygen cycle, thus creating an ozone layer in the stratosphere. Tropospheric ozone has two sources: about 10 % is transported down from the stratosphere while the remainder is created in situ in smaller amounts through different mechanisms.

About 90% of the ozone in our atmosphere is contained in the stratosphere, the region from about 10 to 50 km (32,000 to 164,000 feet) above Earth's surface. Ten percent of the ozone is contained in the troposphere, the lowest part of our atmosphere where all of our weather takes place. Ozone concentrations are greatest between about 15 and 40 km, where they range from about 2 to 8 parts per million. If all of the ozone were compressed to the pressure of the air at sea level, it would be only a few millimeters thick.

Ultraviolet light and ozone
Although the concentration of ozone in the ozone layer is very small, it is vitally important to life because it absorbs biologically harmful ultraviolet (UV) radiation emitted from the Sun. UV radiation is divided into three categories, based on its wavelength; these are referred to as UV-A, UV-B, and UV-C. UV-C, which would be very harmful to humans, is entirely screened out by ozone at around 35 km altitude.

UV-B radiation can be harmful to the skin and is the main cause of sunburn; excessive exposure can also cause genetic damage, resulting in problems such as skin cancer. The ozone layer is very effective at screening out UV-B; for radiation with a wavelength of 290 nm, the intensity at Earth's surface is 350 million times weaker than at the top of the atmosphere. Nevertheless, some UV-B reaches the surface. Most UV-A reaches the surface; this radiation is significantly less harmful, although it can potentially cause genetic damage.

Depletion of the ozone layer allows more of the UV radiation, and particularly the more harmful wavelengths, to reach the surface, causing increased genetic damage to living organisms.

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Answer 4

The ozone layer in the upper atmosphere absorbs ultraviolet light coming from the sun and helps protect us from skin cancer and cataracts. These would occur because of the effects of UV light on the skin and eyes.

Answer 5

The ozone layer is a mixture of gases which serve as a protective shield against ultra violet rays emitted by the sun.
It envelops our planet earth

Answer 6

ozone is about saving us from dieing from the sun and other space crap its our shield our life

Answer 7

Its all a big scam !!!!!!!!!!