Ozone layer depletion, its causes, effects and control. The stratosphere, the next higher layer, extends about 1050 kilometers above the earths surface. Another disadvantage is that returning space junk burns up, and goes through the ozone layer at an incandescent temperature. This layer absorbs 9399% of the suns high frequency ultraviolet light, which is potentially damaging to life on earth 1. First it absorbs some of the higher energy uv rays from the sun in the same way a cloud absorbs and reflect some of the visible light. The ozone layer or ozone shield is a region of earths stratosphere that absorbs most of the suns ultraviolet radiation.
The ozone layer in the atmosphere is responsible for saving the planet from the destructive rays of the sun. The word ozone means smelly in greek because the gas has a strong odor. It contains high concentration of ozone o3 in relation to other parts of the atmosphere. Ozone layer is also naturally broken down but there is a balance between its formation and natural depletion. Ozone layer introduction the ozone layer refers to the ozone within stratosphere, where over 90% of the earths ozone resides. The stratospheric ozone layer absorbs ultraviolet light uv emitted by the sun. Mar 21, 2020 ozone depletion, gradual thinning of earth s ozone layer in the upper atmosphere caused by the release of chemical compounds containing gaseous chlorine or bromine from industry and other human activities. In lower atmosphere, atmospheric oxygen get dissociated and subsequently combines with. These radiations cause destruction to eyes and skin of whoever gets exposed to it. Ozone is a gas that increases the amount of oxygen in the body, and is increasing in popularity, especially in the alternative health world. In this way, they help to save us from harmful rays. Ozone is a form of oxygen in which three atoms of oxygen combine to form a single molecule of ozone. Ozone layer depletion causes, effects and solutions 7.
The sun propagates ultraviolet radiations which as an adverse effect on living beings. It contains high concentration of ozone o 3 in relation to other parts of the atmosphere, although still small in relation to other gases in the stratosphere. Such ozone holes where later noticed in the north polar regions. Ozone in the stratospherea layer of the atmosphere between 15 and 50. Presentation on ozone depletion linkedin slideshare. Although ozone is present in small concentrations throughout the atmosphere, most around 90% exists in the stratosphere, a layer 10 to 50 kilometres above the earths surface. We can define the ozone to be a gas which is present naturally in the environment. The ozone layer is the common term for the high concentration of ozone that is found in the stratosphere. The ozone layer is located at the height from 20 to 40 km above the sea level, and it is located in the lower part of the stratosphere layer, as it is the first layer of the atmospheric envelope which contains a suitable amount of oxygen gas, and it also faces the ultraviolet radiations that emitted from the sun the structure of the ozone layer. Ozone exerts its therapeutic effect through the mechanism of oxidative stress. It addressed the im portance of conservation of ozone layer and established. Abstract there are many situations where human activities have significant effects on the environment. The sun radiates large variety of radiations including ultraviolet radiations which are very harmful to the human body.
Where is the ozone layer and how concentrated is it. About 90% of the planets ozone is in the ozone layer. The ozone layer is a natural layer of gas in the upper atmosphere that protects humans and other living things from harmful ultraviolet uv radiation from the sun. The presence of ozone is of singular importance because it filters out the incoming ultraviolet uv radiation and thus acts as a screen against ultraviolent. Mar 09, 2017 the stratospheric ozone layer absorbs ultraviolet light uv emitted by the sun.
Importance of the ozone layer, effects of ultraviolet light on humans, location of ozone in atmosphere, graphing ozone concentra. For the ozone layer to return to its natural state, the chlorine loading which is presently 3 ppbv has to be brought down to a level below 2 ppbv. The ozone layer contains less than 10 parts per million of ozone, while the average ozone concentration in. Pdf atmospheric ozone layer depletion and its impact. Man has tried hard to deploy protective measures towards controlling the ozone layer. Environmental studies ozone depletion tutorialspoint. Short paragraph on harmful effects of ozone layer depletion. Comparison of holes in ozone layer with year holes in antarctica madebypratik 6 7. The ozone layer which is present naturally in the lower layers of the atmosphere helps in eradicating the pollutants from the surface of the earth. Ozone depletion, gradual thinning of earth s ozone layer in the upper atmosphere caused by the release of chemical compounds containing gaseous chlorine or bromine from industry and other human activities.
Importance of ozone layer ozone is concentrated in the lower stratosphere between 15 and 30 km above the earths surface the socalled ozone layer. Why the ozone layer is vital to life on earth the ozone layer is a protective shield that blocks the suns harmful ultraviolet rays from reaching the earths surface. Steph, apparently, the disadvantage of having an ozone layer is that it can develop holes in it, and since we humans need one, it is bad that the holes develop. It absorbs shortwave ultraviolet rays harmful to the human body and prevents it from reaching the earth to shield the earths surface organisms from ultraviolet rays. Where is the ozone layer located and importance of ozone. Pdf causes of ozone layer depletion and its effects on. To understand the importance of the ozone layer, its crucial to first establish the difference in concentrations of ozone throughout the earths atmosphere. Nearsurface ozone often results from interactions between certain pollutants such as nitrogen oxides and volatile organic compounds, strong sunlight, and hot weather. It exists in the stratosphere between 20 and 50 kilometers above the surface. Although the concentration of the ozone in the ozone layer is very small, it is vitally important to life because it.
The ozone layer is important to all life on planet earth because it protects all living things from the effects of suns damaging ultraviolet radiation. Ozone depletion and the environment there is overwhelming scientific evidence that manmade chemicals are destroying the ozone layer nobel prizes have already been awarded for the research. The density of ozone gas in the greatest within 1530 km of stratosphere. And, most important, it has become clear that, if ozonedepleting gases were to continue to accu mulate in the atmosphere, the result would be more ozone. The ozone layer protects the surface of the earth and its phenomena from stray rays from the sun. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that. In the upper atmosphere, atmospheric gases absorbs the suns radiation, get ionized, and release molecules. The cause of ozone layer depletion are discussed below. Ozone layer depletion is one of the most serious problems faced by our planet earth.
The layer of ozone gas is what which protects us from the harmful ultraviolet radiations of the sun. Relative importance of the changes in the abundance of various gases in the atmosphere. As the result the local climate will be changed, beside this the level of the sea will be increased as the continental and. What are the disadvantages of having an ozone layer. Importance of the ozone layer in the earths atmosphere. Rush limbaugh argues that humans are safe, because volcanic chlorine has been working on the ozone layer longer than manmade chlorine, and yet were. Winner of the standing ovation award for best powerpoint templates from presentations magazine. The ozone layer is found in the upper regions of the stratosphere where it protects the earth from the harmful ultraviolet rays of the sun. Ozone can be produced by numerous chemical reactions, but the main mechanism in the atmosphere for its production and removal is absorption of ultraviolet uv radiant energy from the sun. The cause of ozone layer depletion are discussed below effect of climate. Ozone is a colourless gas which is found in the stratosphere of our upper atmosphere. The ozone layer is a concentration of ozone molecules in the stratosphere. On this day of our commitment to save the ozone layer, let us try to know some important basics about ozone layer and its importance for.
Ozone layer is a thin blanketlike layer that spreads over the atmosphere of the earth. The ozone layer is a layer with high ozone concentration in the stratosphere of the atmosphere. Approximately 90 percent of the atmospheres ozone occurs from 1018 km 611 miles to about 50 km about 30 miles above earths surface. The ozone layer absorbs harmful radiations from the sun, thereby reducing cancer and cataract risks, making life on earth safe from hazardous cosmic rays. Dense layers of molecular gases also absorb cosmic rays, gamma rays and xrays, preventing these energetic particles from striking living things and causing mutations and other genetic damage. There are natural processes that create and destroy ozone in the stratosphere. This outgoing oxygen helped produced the ozone layer. This worksheet has earth science regents questions about the ozone layer and ozone depletion. When highenergy ultraviolet rays uvc strike an oxygen. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. The vienna convention for protection of ozone layer was adopted by 43 nations in 1985. In the figure we see a standard profile of ozone gas concentration through the earths atmosphere, extending from ground level up to 40 kilometres in altitude. There is a burgeoning need to reduce the production of industrial products causing ozone depletion and global warming. Ozone layer, also called ozonosphere, region of the upper atmosphere, between roughly 15 and 35 km 9 and 22 miles above earths surface, containing relatively high concentrations of ozone molecules o 3.
At present, the amplitude and extent of such a cooling, and therefore the delay in the recovery of the ozone layer, still have to be assessed. Read about the health benefits of ozone therapy for cancer, lyme disease, autoimmunity, and aids. The presence of ozone is of singular importance because it filters out. Summarize the research findings on the ozone layer, beginning in the 1970s identify the importance of the montreal protocol as it was originally. Ozone is harmful at ground level but high up the atmosphere ozone layer plays a vital role in the protection of all living beings. If the solar uv light were able to penetrate the stratosphere and troposphere and reach the earths surface, it would seriously damage our ecosystem. Depletion of o3 can increase uv radiation entering earth surface. The importance of ozone is defined by the fact that it protects the earth from harmful ultraviolet rays from the sun. One chlorine molecule from a cfc can destroy up to 100,000 ozone molecules. Cfc molecules are highly stable and can last for up to 100 years. These radiations can cause skin cancer in the humans. We celebrate september 16 every year as the international ozone day to commemorate the signing of the montreal protocol. The ozone layer is located between 9 and 25 miles 15 and 40 kilometers up in the atmosphere, and it is produced by the interaction of the suns radiation with certain air molecules. Mar 07, 2020 ozone is a gas that increases the amount of oxygen in the body, and is increasing in popularity, especially in the alternative health world.
Stratospheric ozone protection awards since 1990, epa has recognized outstanding achievement in ozone layer protection. Introduction formation of the ozone layer the chapman cycle problems with the chapman cycle depletion of the ozone layer. The ozone layer is a layer in earths atmosphere which. Ozone layer depletion cause, effects, and solutions. Causes of depletion of ozone layer the main things that lead to the destruction of the ozone gas in the ozone layer are. However, even the small amount of ozone plays a key role in the atmosphere. This layer reflects the ultra violet rays of the run so that it doesnt reach the earth surface. The following points illustrate the importance of the ozone layer as an essential component of the earths atmosphere. Index terms bio effects, chlorofluorocarbon, ozone layer depletion, protection.
The sun radiates a huge variety of radiations such as ultraviolet radiations which are very harmful to the human body. Without the layer of ozone in the atmosphere, it would be very difficult for anything to survive on the surface. Why ozone layer is important ozone layer depletion and. Ppt ozone layer depletion powerpoint presentation free. Causes, effects and solutions of ozone layer depletion. Ozone, a gaseous molecule of three oxygens, surrounds the earth in what is known as the ozone layer. As the result the local climate will be changed, beside this the level of the sea will be increased. It is the ozone layer which helps to absorb the ultraviolet radiation rays. All of us are aware of how the concern related to depletion of ozone layer and the ozone hole, which also led to the ban of many chemicals such as the chlorofluorocarbon cfc. The ozone in the world s upper environment, the stratosphere, directs and diminishes ultraviolet rays the uvb range. Realization of the importance of ozone layer and confirmation of holes in the ozone umbrella led to important accordsprotocols i. The ozone layer and its importance the ozone layer and. Ozone layer, region of the upper atmosphere, between roughly 15 and 35 km 9 and 22 miles above earths surface, containing relatively high concentrations of ozone molecules. The ozone layer is present in two layers of the atmosphere.
If the ultra violet rays of sun reaches directly to the earth surface, the temperature of the lower atmosphere will be increased. Many of us dont really know what is ozone layer and its importance. Scientists believe that, about 2 billion years ago, oxygen was being produced by shallowwater marine animals. Ozone is a blue colored stinking gas made up of three oxygen molecules which are isotope. Unfortunately, this gives them plenty of time to find their way to the ozone layer. Summarize the research findings on the ozone layer, beginning in the 1970s identify the importance of the montreal protocol as it was originally signed and as it stands today to unlock this lesson. It has the potential to absorb around 9799% of the harmful ultraviolet radiations coming. Apr 22, 2008 steph, apparently, the disadvantage of having an ozone layer is that it can develop holes in it, and since we humans need one, it is bad that the holes develop. It is also one of the prime reasons which are leading to global warming. The most concentrated part is located at an altitude of 2025 kilometers. The layer of the earths atmosphere that surrounds us is called the troposphere. Mar 07, 2017 such ozone holes where later noticed in the north polar regions. It allows only the required doses of the suns solar energy to reach the earths surface.
However, the ozone layer is destroyed by manmade chemicals known as ozonedepleting substances ods. The thinning is most pronounced in the polar regions, especially over antarctica. This quizworksheet combo will help you test your understanding of. Ozone present in the stratosphere forms a protective layer and known as ozone layer, ozonosphere or ozone umbrella its concentration in atmosphere is about 10 ppm. Causes of ozone layer depletion and its effects on human. The ozone layer is found in the lower portion of the earths atmosphere. While this bluetinged gas benefits the atmosphere, ozone forms a layer of chemical smog at ground level. The presence of the gas is the best in the air which is closed to the earth surface. Ozone is mainly present in the ozone layer in the lower part of the stratosphere 20 km from the surface of the earth, and the content is about 50 ppm. Sep 20, 2016 importance of ozone layer ozone is concentrated in the lower stratosphere between 15 and 30 km above the earths surface the socalled ozone layer. Ozone is a gas in the atmosphere that protects everything living on the earth from harmful ultraviolet uv rays from the sun. As a result the total amount of ozone remains constant.
Protecting the ozone layer department of the environment. Approximately 90 percent of the atmospheres ozone occurs in the stratosphere, the region extending from 1018 km 611 miles to approximately 50 km about 30 miles. This layer absorbs the radiations and prohibits them from entering the outer surface of the earth. Most of the remaining ozone occurs in the troposphere, the layer of the atmosphere that extends from earths surface up to the stratosphere. The image below shows the relative importance of the changes in the abundance of various gases in the atmosphere. We can differentiate this profile into two key zones. If the ozone of the ozone layer is calibrated to the standard case, its thickness is only about 3 mm on average. As a result of its chemical composition, ozone is regarded as a special type of oxygen as it contains three oxygen molecules o3 as opposed to the usual two oxygen molecules o2. In lower atmosphere, atmospheric oxygen get dissociated and subsequently combines with molecular oxygen of the. Essay on ozone depletion and the environment 1505 words. On this day of september 16, marked as the ozone layer day, let use try to know some of the basics of ozone layer like what is ozone layer, importance of ozone layer, how ozone layer gets depleted, effects of depletion of ozone layer, how to prevent depletion of ozone layer, montreal protocol, our role in preventing ozone layer etc. Why ozone layer is important ozone layer depletion and it. Ozone layer the ozone layer is basically naturally occurring gas in the region of stratosphere where ozone particles are accumulated 2.
The ozone layer high in the earths atmosphere blocks much of this radiation from reaching the surface. Ozone is an irritating, corrosive, colorless gas with a smell something like burning electrical wiring. The importance of the ozone layer and its structure. The parts of the uv light absorbed or reflected is very harsh on the. The ozone layer is a deep blanket in the stratosphere made up of comparatively high concentration of the ozone. It also helps to prevent them from reaching the surface of the earth.
The ozone layer absorbs ultraviolet radiation rays and prevents them from coming to the surface of the earth thus saving the human beings from harmful rays. Introduction the ozone layer is a layer in earths atmosphere which contains relatively high concentrations of ozone o3. The density of ozone gas is not the same in the air. Ozone plays a different role in atmospheric chemistry at different heights in the earths atmosphere. May 02, 2015 harmful effects of ozone layer depletion.
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