The ozone address is the payment which absorbs the pigment is coming in the formula its body level is called at
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have talked about the hazards of excess ozone in the troposphere. The troposphere is the layer of the atmosphere that is closest to Earth, running from 0-12 km above the earth's surface.
What we will talk about now is hazards of too little ozone in the stratosphere – the region of the atmosphere that extends from about 12 - 50 km above Earth.
Ozone forms naturally in the stratosphere via dissociation of molecular oxygen (O2) by ultraviolet radiation, and subsequent combination of atomic oxygen (O) with molecular oxygen. Ultraviolet radiation is short wave, high intensity radiation, indicated on the reaction below as hv. (I can't seem to make this hv show as being above the line, indicating that the reaction takes place in the presence of hv, but that's where it should be.)
O2---(hv)-------> O+ O
O + O2 -------->O3
The ultraviolet radiation that dissociates molecular oxygen is referred to as uv-c radiation. It is very short wavelength (<242 nm [recall a nanometer [nm] is one billioneth of a meter]) and very high intensity radiation. This is not the same as uv-b radiation, which is biologically damaging wavelengths, and which we'll say more about in a moment.
IT IS IMPORTANT TO HAVE O3 IN THE STRATOSPHERE --
It is earth's primary shield against damaging uv-b radiation. This radiation is also short wave (280 - 320 nm) and high intensity. Ozone absorbs radiation in the 220 - 320 nm band and so keeps most of it from penetrating to earth. Why do we want to be shielded from uv-bradiation?
Well, uv-b radiation is biologically active radiation. It is responsible for causing damage such as:
skin cancers
cataracts
damage to immune systems
injury to plants
injury to marine organisms
Ozone concentrations peak in lower stratosphere (25 - 35 km above Earth), where it serves this protective function. Peak concentrations are generally <10 ppmv. Above this height, the density of gases is so low that O rarely finds O2 to collide with, so there is not much O3 formation, and below this height, too little high intensity solar radiation (uv-c) penetrates to dissociate much molecular oxygen.
Ozone is also destroyed naturally in the stratosphere, being dissociated by ultraviolet radiation:
O3 ----(hv)----> O + O2
This is the reaction that is responsible for O3's absorbtion of uv radiation that would otherwise reach earth.
The O atom then typically joins with an O2 molecule to reform O3. The O3 goes on to dissociate and reform many times, usually until it collides with a free O atom, forming two relatively stable O2 molecules.
O3 + O --------> 202 (conversion to relatively stable O2)
That is, O3 formation and destruction are normally in a steady state in the stratosphere, such that the rate of its formation is equal to the rate of its removal. (Ozone is also destroyed by odd nitrogen and hydrogen radicals in catalytic cycles which won't go into, but which have generally been in balance with rates of formation.)
So, what is the concern all about? It is actually a fascinating story.
I hope you help it
please mark as brain list
What we will talk about now is hazards of too little ozone in the stratosphere – the region of the atmosphere that extends from about 12 - 50 km above Earth.
Ozone forms naturally in the stratosphere via dissociation of molecular oxygen (O2) by ultraviolet radiation, and subsequent combination of atomic oxygen (O) with molecular oxygen. Ultraviolet radiation is short wave, high intensity radiation, indicated on the reaction below as hv. (I can't seem to make this hv show as being above the line, indicating that the reaction takes place in the presence of hv, but that's where it should be.)
O2---(hv)-------> O+ O
O + O2 -------->O3
The ultraviolet radiation that dissociates molecular oxygen is referred to as uv-c radiation. It is very short wavelength (<242 nm [recall a nanometer [nm] is one billioneth of a meter]) and very high intensity radiation. This is not the same as uv-b radiation, which is biologically damaging wavelengths, and which we'll say more about in a moment.
IT IS IMPORTANT TO HAVE O3 IN THE STRATOSPHERE --
It is earth's primary shield against damaging uv-b radiation. This radiation is also short wave (280 - 320 nm) and high intensity. Ozone absorbs radiation in the 220 - 320 nm band and so keeps most of it from penetrating to earth. Why do we want to be shielded from uv-bradiation?
Well, uv-b radiation is biologically active radiation. It is responsible for causing damage such as:
skin cancers
cataracts
damage to immune systems
injury to plants
injury to marine organisms
Ozone concentrations peak in lower stratosphere (25 - 35 km above Earth), where it serves this protective function. Peak concentrations are generally <10 ppmv. Above this height, the density of gases is so low that O rarely finds O2 to collide with, so there is not much O3 formation, and below this height, too little high intensity solar radiation (uv-c) penetrates to dissociate much molecular oxygen.
Ozone is also destroyed naturally in the stratosphere, being dissociated by ultraviolet radiation:
O3 ----(hv)----> O + O2
This is the reaction that is responsible for O3's absorbtion of uv radiation that would otherwise reach earth.
The O atom then typically joins with an O2 molecule to reform O3. The O3 goes on to dissociate and reform many times, usually until it collides with a free O atom, forming two relatively stable O2 molecules.
O3 + O --------> 202 (conversion to relatively stable O2)
That is, O3 formation and destruction are normally in a steady state in the stratosphere, such that the rate of its formation is equal to the rate of its removal. (Ozone is also destroyed by odd nitrogen and hydrogen radicals in catalytic cycles which won't go into, but which have generally been in balance with rates of formation.)
So, what is the concern all about? It is actually a fascinating story.
I hope you help it
please mark as brain list
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Answer:
The ozone layer is a region of high ozone concentration in the stratosphere, 15 to 35 kilometres above Earth's surface. The ozone layer acts as an invisible shield and protects us from harmful ultraviolet (UV) radiation from the sun. In particular, the ozone layer protects us from the UV radiation, known as UV-B, which causes sunburn. Long-term exposure to high levels of UV-B threatens human health and damages most animals, plants and microbes, so the ozone layer protects all life on Earth.
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