Vililia bsed ivs d ozone layer depletion causes, effects and solutions ozone layer depletion is one of the most serious problems faced by our planet earth. The depletion of the ozone layer has thus resulted in the birth of a fear in everybodys minds. Ozone depletion greenhouse gases and climate change. The level from which it extends outward varies with latitude. This is a school project on the ozone layer made by my daughter aakanksha. The problem of ozone depletion and its adverse consequences have threatened the existence of life on the planet. 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. Pdf causes of ozone layer depletion and its effects on. In the upper atmosphere, atmospheric gases absorbs the suns radiation, get ionized, and release molecules. However, the fact that there also exists another layer strong enough to stop the former one is comforting. The ozone layer prevents most ultraviolet uv and other highenergy radiation from penetrating to the earths surface but does. Unit 4 project amelia shae, olive ann parker, and peyton thompson. Ozone depletion consists of two related events observed since the late 1970s.
This happens when the chlorine and bromine atoms in the atmosphere come in contact with ozone and destroy the ozone molecules. One chlorine can destroy 100,000 molecules of ozone. Efforts to protect the ozone layer now involve many different nations and industries. Climatologists project that the accumulation of greenhouse gases in the lower atmosphere will. The thinning is most pronounced in the polar regions, especially over antarctica. Pdf depletion of the ozone layer and its consequences. The ozone layer or ozone shield is a region of earth s stratosphere that absorbs most of the sun s ultraviolet radiation. Project on ozone layer depletion email this blogthis. For this science project you will need to develop your own experimental procedure. Depletion to ozone layer depletion does not affect a region or a country. Search, discover and share your favorite ozone gifs. Nearly 90% of earths ozone is in the stratosphere and referred to as the ozone layer. Our experts wont do the work for you, but they will make suggestions and offer guidance if you come to them with specific questions.
Chloroflourocarbons are major cause of ozone depletion. The world health organization was established in 1948 as a. The latter phenomenon is referred to as the ozone hole. The natural distribution of ozone around the earth is. Causes of ozone layer depletion and its effects on human. Ozone depletion results in an increase of uvb radiation, but the shorter the wavelength, the stronger the increase within the uvb range. Project report on ozone depletion environmental pollution. This site is like a library, use search box in the widget to get. To the point where a seasonal hole in the ozone layer began to appear above the antarctic. Ozone layer depletion pdf file the origin, causes, mechanisms and bio effects of ozone layer depletion as. Ozone layer the ozone layer is basically naturally occurring gas in the region of stratosphere where ozone particles are accumulated 2.
It is also one of the prime reasons which are leading to global warming. Approximately 90 percent of the atmospheres ozone occurs from 1018 km 611 miles to. Depletion of stratospheric ozone o3, as commonly known as the hole in the ozone layer, is an issue of international concern. Layers of the atmosphere 45the suns utraviolet rays 68the ozone layer 9 3.
The ozone depletion resulted in secondary production of an ozone layer near the ground terrestrial ozone layer, which is responsible for adverse effects on plants, humans and environment with increased number of bronchial diseases in humans. The earths ozone layer is mainly found in the lower portion of the stratosphere from approximately 20 to 30. Ozone layer depletion cause, effects, and solutions. At the end of 20, 258 projects have been committed for an. Human eye and skin are the most exposed part of the body to these. The so 2f 2 global background mixing ratio increased during recent decades and had reached about 1. Ozone layer depletion causes, effects and solutions 7. Ozone layer depletion is one of the most serious problems faced by our planet earth. The ozone hole is an area where the amount of ozone in the upper atmosphere is much lower than normal.
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. Ozone is a colourless gas which is found in the stratosphere of our upper atmosphere. Progress report 2003 united nations environment programme, environmental e. Free chlorine in the upper atmosphere catalyzes the conversion of o3 into o2. These substances should be banned or we should use their alternatives so that in future we can protect ourselves from the harmful effects of uv radiation. Nearly 500 organizations, teams, and individuals from 40 countries have received stratospheric ozone protection awards for their exceptional leadership, personal dedication, and technical achievements.
As a matter of fact, if one were to take all of the ozone in the atmosphere at o o c and compress it to a pressure of 1 atmosphere, the thickness of the ozone layer over the earths surface would be 0. The main reasons of this depletion are the release of organohalogen compounds like chlorofluorocarbons and bromofluorocarbons. Conclusion and recommendations ozone layer is continuously depleting which is highly alarming situation of today. It contains high concentration of ozone o 3 in relation to other parts of the atmosphere, although still small. About depletion of the ozone layer is the anticipated increase in the amounts of. Pdf ozone o 3 is a stratospheric layer that plays important role in providing support to humans for their survival. As a result the total amount of ozone remains constant.
Within the stratosphere, the ozone layer is the portion that contains the highest. The layer of ozone gas is what which protects us from. The ozone layer is important for blocking most of the harmful radiation that comes from the sun. Use the information in the summary tab as a starting place.
In fact whole world is vulnerable to its after affects. Let us have a detailed look at the various causes and effects of ozone layer depletion. The causes, mechanism and bioeffects of ozone layer depletion on humans were addressed. Stratospheric ozone protection awards since 1990, epa has recognized outstanding achievement in ozone layer protection.
Ozone layer depletion is the thinning of the ozone layer present in the atmosphere. Project ozone layer depletion pdf the stratospheric ozone layer forms a thin shield in the upper atmosphere, protecting life on earth from. Foreword many people in europe are concerned about the impacts of climate. Found in stratosphere, filters out ultra violet radiation uva and uvb essay on layers of atmosphere activity essay layers on of atmosphere activity atiyah essays on contract 1986 world this dissertation is submitted in partial fulfillment. Measurements from satellitebased instruments show that this area of very low ozone concentration has developed over antarctica every year since about 1975. When this breakdown of the ozone layer occurs, the earth stands more vulnerable as it. In lower atmosphere, atmospheric oxygen get dissociated and subsequently combines with molecular oxygen of the. Causes, effects and solutions of ozone layer depletion. Ozone depletion over india with so much worry about the rapid ozone depletion taking place in various parts of the earth, indian scientists are closely monitoring the ozone layer over india for possible depletion trends. Ozone absorbs a band of ultraviolet radiation called uvb. Ozone layer is also naturally broken down but there is a balance between its formation and natural depletion. The ozone layer helps to protect life from harmful ultraviolet radiation. The layer of ozone gas is what which protects us from the harmful ultraviolet radiations of the sun.
You can find maps of the ozone layer and compare different regions of the globe for ozone coverage. Click download or read online button to get ozone depletion greenhouse gases and climate change book now. The increase in the levels of uv rays lead to high rate of skin cancer and eye related problems. The roll of ozone is very crucial and significant because it acts as a protective shield in the biosphere ecosystem against their exposure to deadly and dangerous ultraviolet radiation. The stratospheric ozone layer forms a thin shield in the upper atmosphere, protecting life on earth from. Chlorofluorocarbons cfcs are the major cause of ozone depletion.
Timeline of stratospheric ozone depletion and observations. Find out what caused the ozone hole, and how the 1989 montreal protocol sought to put an end to ozone depletion. Ozone layer depletion ozone layer depletion is the gradual thinning of the earths ozone layer in the upper atmosphere caused due tho release of chemical compounds containing gaseous bromine or chlorine from industries or other human activities. If you would like to discuss your ideas or need help troubleshooting, use the ask an expert forum. Most ozone is found in the stratosphere upper part of the atmosphere, more than 10 to 16 kms from the surface of the earth. 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. The only practical approach to stopping the destruction of the ozone layer is to reduce the amount of humancreated pollutants that contribute to its depletion. The increase of ultraviolet light due to depletion of the ozone layer will not only. The chlorofluorocarbon and the halons are potent ozone depletors. Ozone depletion biology science fair project ideas. The resulting pdf file may be inserted into powerpoint, or used like any other pdf file. Weather conditions also influence the size of the ozone hole in the stratosphere. Concentrations of ozonedepleting chemicals continue to rise in the atmosphere.
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