The term ozone depletion can refer to a number of distinct, but related phenomena. A free powerpoint ppt presentation displayed as a flash slide show on id. Ozone layer depletion, its causes and its effects scribd. The purpose of this seminar is to help article 5 countries smoothly phase out. Ozone layer depletion causes, effects and solutions 7. Apr 18, 2019 the ozone layer helps to protect life from harmful ultraviolet radiation. The ozone layer is a deep blanket in the stratosphere made up of comparatively high concentration of the ozone. The latest ozone layer depletion news is included at the foot of the page. Carbon dioxide is the major contributor to global warming.
Protection of the ozone layer climate action european commission. Ozone depleting substances are the substances such as chlorofluorocarbons, halons, carbon tetrachloride, hydrofluorocarbons, etc. Stratospheric ozone protection awards since 1990, epa has recognized outstanding achievement in ozone layer protection. Bangladesh perspective published in national dailies observance of international ozone day, 1998. This quick video discusses the role of the ozone layer and how cfcs can cause ozone depletion. Ozone gas is perceptibly blue in colour and has a characteristic pungent smell. If interested, you can purchase this powerpoint from. This is not really a hole through the ozone layer, but rather a large area of the stratosphere with extremely low amounts of ozone. Protecting the ozone layer department of the environment. However, the ozone layer is destroyed by manmade chemicals known as ozonedepleting substances ods.
The increase of ultraviolet light due to depletion of the ozone layer will not only. Apr 12, 2010 presentation on ozone depletion slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. An international consensus about the causes and effects of ozone depletion has emerged. Find out what caused the ozone hole, and how the 1989 montreal protocol sought to put an end to ozone depletion. Ozone depletion consists of two related events observed since the late 1970s. Ozone depletion facts and information national geographic. One of the main reasons for the widespread concern about depletion of the ozone layer is the anticipated increase in the amounts of ultraviolet radiation received. Ozone can be good or bad for your health and the environment, depending on its location in the atmosphere. In your ozone layer term paper, consider how greenhouse gases contribute to the deletion of the ozone layer and promulgate global warming. Ozone is a gas that occurs both in the earths upper atmosphere and at ground level.
Ozone layer depletion penn state college of earth and. The ozone layer helps to protect life from harmful ultraviolet radiation. Certain industrial processes and consumer products result in the emission of halogen source gases to the atmosphere. Following is the list of some of the main ozone depleting substances and the sources from where they are released. 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. Ozone and environment ozone o3 a gas composed of three atoms of oxygen bluish gas that is harmful to breathe nearly 90% of the earths ozone is in the stratosphere and is referred to as the ozone layer ozone absorbs a band of ultraviolet radiation called uvb ozonedepleting substances ods. Ozone layer depletion ozone layer depletion the effect on the world the effect of ozone layer depletion often seems as if it is a far away problem, given that the actual holes in this protective blanket over the earths atmosphere are concentrated around the poles and far from most human settlements. Ozone layer depletion is one of the most serious problems faced by our planet earth. Ozone layer research papers on the depletion of the the ozone. If interested, you can purchase this powerpoint from my online store. Ozone layer depletion cause, effects, and solutions.
Besides carbon dioxide, other greenhouse gases are methane, water vapour, nitrous oxide, cfcs and ozone. The earths ozone layer is mainly found in the lower portion of the stratosphere from approximately 20 to 30. Since about the 1970s, there has been a decrease in total volume of the ozone in the ozone layer, of about 4%, per decade. Most ozone is found in the stratosphere upper part of the atmosphere, more than 10 to 16 kms from the surface of the earth. There are also springtime polar tropospheric ozone depletion. Approximately 90 percent of the atmospheres ozone occurs from 1018 km 611 miles to. Nearly 500 organizations, teams, and individuals from 40 countries have received stratospheric ozone protection awards for their exceptional leadership, personal dedication, and technical achievements. What emissions from human activities lead to ozone depletion.
Depletion of the ozone layer increase in harmful ultraviolet light depletion of ozone layer chlorine reacts with o3 in the ozone depletion of the ozone layer impact on human body and ecosystems ozone layer depletion incoming harmful ultraviolet light depletion chain reaction q. The latter phenomenon is referred to as the ozone hole. The third body m absorbs the excess energy liberated by the above reaction and there by stabilise the o 3 ozone molecule. Jun 19, 2017 the best sleeping position for back pain, neck pain, and sciatica tips from a physical therapist duration. Why the hole in the atmospheric ozone layer above us. The ozone layer, located in the upper stratosphere 10 50 km above the earths surface, plays the highly important role in protecting life on this planet by absorbing harmful ultraviolet light uvb with wavelengths of between 280315nm. The ozone layer is a belt of the naturallyoccuring gas ozone that sits at an altitude of between 15 and 30 kilometers above the earth. Handbook for the montreal protocol on substances that.
Ozone layer research papers on the depletion of the the. Awareness and knowledge on the ozone depletion and its outreach. The vienna convention for protection of ozone layer was adopted by 43 nations in 1985. A close look at the evolution at the life on earth reveals that initially the. 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. One example of ozone depletion is the annual ozone hole over antarctica that has occurred during the antarctic spring since the early 1980s. 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. These gases bring chlorine and bromine to the stratosphere, which cause depletion of the ozone layer. Depletion to ozone layer depletion does not affect a region or a country. Electromagnetic energy coming from the sun is absorbed by the earth, which. The natural distribution of ozone around the earth is. It is also one of the prime reasons which are leading to global warming.
Pdf ozone depletiona warning of global warming researchgate. In this photograph, the two lowest layers of the atmosphere, the troposphere and the stratosphere, are clearly visible. It occurs mainly in late winter and early spring augustnovember and peak depletion usually occurs. Its consequences, the causal debate, and international cooperation number 6 february 8, 1988 since the announcement of a thinning of the ozone layer over the antarctic by uk scientists in 1985, world attention has been focusing on the causes of this phenomenon. In fact whole world is vulnerable to its after affects. Cfcs, hcfcs, halons, methyl bromide, carbon tetrachloride, and methyl chloroform. Ozone layer is also naturally broken down but there is a balance between its formation and natural depletion. The layer closest to the earths surface is the troposphere. Case study on ozone layer ozone depletion chlorofluorocarbon. Ppt ozone layer depletion powerpoint presentation free. A seminar on the depletion of the ozone layer, presented by ozoagu peter cj. Global warming is caused by the greenhouse effect, which is essential to life as we know it on planet earth.
Jul 02, 2015 this quick video discusses the role of the ozone layer and how cfcs can cause ozone depletion. Approximately 90 percent of the atmospheres ozone occurs from 1018 km 611 miles to about 50 km about 30 miles above earths surface. Ozone depletion simple english wikipedia, the free encyclopedia. Ozone is formed by photochemical reaction, followed by three body reaction. Pdf causes of ozone layer depletion and its effects on. The maps were produced with data collected by statellite istruments, including the ozone monitoring instrument on the aura satellite. There, it will absorb almost all ultraviolet light which is harmful to many organisms. National seminar on plant science and human welfare. Project report on ozone depletion environmental pollution. Indias integrated approach to protect the ozone layer introduction one of the most important environmental concerns the world faces today is of depletion of the ozone layer in the stratosphere. It addressed the im portance of conservation of ozone layer and established. Ppt ozone layer depletion powerpoint presentation free to. Unlike oxygen o2, ozone has a strong scent and is blue in color. Vivert1448 priyanka n jeevan 1446 1453 rekha 1445 shabnam 1447.
Indias integrated approach to protect the ozone layer. Ozone depletion and climate change environment canada. The increase in the levels of uv rays lead to high rate of skin cancer and eye related problems. Case study on ozone layer free download as powerpoint presentation. Scribd is the worlds largest social reading and publishing site. The ozone layer has been identified in term papers as important in the overall spectrum of the atmosphere. Increased depletion has recently started occurring over the arctic as well.
The ozone layer is mainly found in the lower portion of the stratosphere. The ozone hole is shown in purple above the antarctic on sept. The ozone layer refers to a region of earths stratosphere that absorbs most of the suns uv radiation. There are natural processes that create and destroy ozone in the stratosphere. Ozone layer the ozone layer is basically naturally occurring gas in the region of stratosphere where ozone particles are accumulated 2. Ozone depletion has been measured everywhere in the world except in the tropics. Presentation on ozone depletion slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising.
Ozone is a colourless gas which is found in the stratosphere of our upper atmosphere. Presentation on ozone depletion linkedin slideshare. As a result the total amount of ozone remains constant. Causes of ozone layer depletion and its effects on human. Measures should be taken to protect our earth from the harmful ultraviolet rays. This can only be done by reducing the use of compounds which react in the atmosphere to harm the ozone layer. There is a burgeoning need to reduce the production of industrial products causing ozone depletion and global warming. 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. Ppt a seminar on the depletion of the ozone layer, presented by. We have seen the various effects of ozone layer depletion and can conclude by saying that it is very important for our survival. Frequently asked questions about the ozone layer ozone.
The best sleeping position for back pain, neck pain, and sciatica tips from a physical therapist duration. If you continue browsing the site, you agree to the use of cookies on this website. Ozone depletion simple english wikipedia, the free. The concern is because of the fact that the ozone layer plays a protective role, screening the earth from harmful ultraviolet radiations. The ozone layer was discovered in 19 by the french physicists charles fabry and henri buisson. Ozone and environment ozone o3 a gas composed of three atoms of oxygen bluish gas that is harmful to breathe nearly 90% of the earths ozone is in the stratosphere and is referred to as the ozone layer ozone absorbs a band of ultraviolet radiation called uvb ozone depleting substances ods. When there was no ozone layer, life could only exist in. The layer of ozone gas is what which protects us from the harmful ultraviolet radiations of the sun. It contains high concentrations of ozone o3 relative to other parts of the atmosphere.
Ozone is a gas that is present in the ozone layer in the stratosphere of the earth. Since about the 1970s, there has been a decrease in total volume of the ozone in the ozone. Ozone depletion, gradual thinning of earths ozone layer caused by the release of chemical compounds containing gaseous chlorine or. Prolonged exposure to uvb radiation is linked to skin cancer. Ozone layer depletion, its causes and its effects free download as powerpoint presentation. Ozone secretariat the secretariat for the vienna convention for the protection of the ozone layer and for the montreal protocol on substances that deplete the ozone layer united nations environment programme nairobi, kenya ozone. When highenergy ultraviolet rays uvc strike an oxygen. Depletion of stratospheric ozone o3, as commonly known as the hole in the ozone layer, is an issue of international concern.
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. 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. When there was no ozone layer, life could only exist in the sea. Causes, effects and solutions of ozone layer depletion. Environmental chemistry 401 carbon dioxide crosses the delicate proportion of 0. Global warming and ozone layer depletion are two different problems see the sidebar misconceptions about global atmospheric change on page 95. The thinning is most pronounced in the polar regions, especially over antarctica. Ozone layer ozone layer research papers discuss the depletion of the the ozone layer in the atmosphere. We have been running oneday summer seminars on ozone depletion since 2009.
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