Far above earths surface, the ozone layer helps to protect life from harmful ultraviolet radiation. This document, twenty questions and answers about the ozone layer. A free powerpoint ppt presentation displayed as a flash slide show on id. Ppt ozone layer depletion powerpoint presentation free to. The ozone story presentation ozone secretariat unep ozone distribution in the atmosphere scientific background i history 1839. National aeronautics and the ozone hole space administratio n. Ozone o3 is a molecule made up of three atoms of oxygen o, and is mostly found in the stratosphere, where it protects us from the suns harmful ultraviolet uv radiation. Ground ozone concentration is lower in polar and equatorial regions. Explore the causes of ozone depletion and the effect on plankton, algae, plants, amphibians, and humans. The evolution of stratospheric ozone depletion policy can best be understood as a twostage process. This effects of ozone depletion presentation is suitable for 11th higher ed. Money and time are being spent on ozone repair, but the problem still exists. Project report on ozone depletion environmental pollution.
Ozone depletion is the process of destruction of the ozone layer which can cause adverse effects on the living forms by many pollutants releases out from the vehicles, industries etc. Ozone depletion ozone depletion chlorofluorocarbon. Case study depletion of ozone in the atmosphere the work of g. Let us have a detailed look at the various causes and effects of ozone layer depletion. Ozone depletion consists of two related events observed since the late 1970s. Stratospheric ozone depletion noaas earth system research.
Unlike oxygen o2, ozone has a strong scent and is blue in color. The montreal protocol on substances that deplete the ozone layer. Cfcs, hcfcs, halons, methyl bromide, carbon tetrachloride, and methyl chloroform. Progress report 2003 united nations environment programme, environmental e. Protecting the ozone layer department of the environment. In 1985, using satellites, balloons, and surface stations, a team of researchers had discovered a balding patch of ozone in the upper stratosphere, the size of the united states, over antarctica. Ppt ozone layer depletion powerpoint presentation free. Most questions and answers are updates of those presented in previous ozone assessments, while others have been added or. Ozone layer depletion cause, effects, and solutions biology. The ozone hole is an area where the amount of ozone in the upper atmosphere is much lower than normal.
These radiations can cause severe diseases in humans such as skin cancer, eye damage and genetic mutations etc 9. Evolution of policy responses to stratospheric ozone depletion. Ozone in the lower atmosphere contributes to global warming and climate change. Use the information in the summary tab as a starting place. Chapte r ozone depletion potentials, global warming. These gases are carried to the stratosphere layer of atmosphere where. Our powerpoint presentation about ozone depletion, its effects and its causes. Ozone depletion, gradual thinning of earths ozone layer in the upper atmosphere caused by the release of chemical compounds containing gaseous chlorine or bromine from industry and other human activities. The thinning is most pronounced in the polar regions, especially over antarctica. Declines since 1996 in total column and stratospheric abundances of inorganic chlorine compounds are reason.
How we saved the planet tells the largelyforgotten story of the hole in the ozone layer and how the nations of the world came together to fix it. Find powerpoint presentations and slides using the power of, find free presentations research about depletion of ozone layer ppt. Depletion of stratospheric ozone o3, as commonly known as the hole in the ozone layer, is an issue of international concern. It was agreed on 16 september 1987, and entered into force on 1 january 1989. Find out what caused the ozone hole, and how the 1989 montreal protocol sought to put an end to ozone depletion.
A seminar on the depletion of the ozone layer, presented by ozoagu peter cj. It contains some videos and gif at thte end from an external source. Due to this, it is also taking a toll on our health and the environment. Most ozone is found in the stratosphere upper part of the atmosphere, more than 10 to 16 kms from the surface of the earth. Learn what cfcs are, how they have contributed to the ozone. Thank you tamil 10 days botany crash course for tnpsc forester exam. Management of ozonedepleting substances reported to the. October average for total ozone over antarctica, 19551995 based on british measurements from weather balloons. The antarctic ozone hole is recovering, while continuing to occur every year.
Causes, effects and solutions of ozone layer depletion. Although ozone depletion has been a global issue, there is significant differences in distribution of ozone layer depletion across the world. This video is about water pollution pollution and ozone depletion topic in 9th science. Tthe ozone hole and global he ozone hole and global global. Update on ozonedepleting substances odss and other gases of. Tthe ozone hole and global he ozone hole and global wwarming 2arming 2 the ozone hole and global warming fact file if all the ozone above your head was collected in a continuous layer, it would. It contains high concentrations of ozone o3 relative to other parts of the atmosphere. Ozone layer protection environmental protection department. The depletion of ozone layer has trickle down effects in the form of global warming, which in turn leads to melting of polar ice, which will lead to rising sea levels and climatic changes around the world. Scientific assessment of ozone depletion montreal protocol. Presentation on ozone depletion ozone depletion medicine. Plasmafire intl 7186205th street langley, bc canada v2y 1t1 6045329596 presents the story of ozone by dr. Stratospheric ozone depletion, ultraviolet radiation and.
The causes, mechanism and bioeffects of ozone layer depletion on humans were addressed. Experiments show that ozone strongly absorbs solar ultraviolet uv radiation. Health and environmental effects of ozone layer depletion. Ozone depletion potentials odps were a very important measure in the formulation of the montreal protocol and its amendments.
The designations employed and the presentation of the material in this publication do not. 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. The vienna convention for the protection of the ozone layer. 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. Temperature of the stratosphere is a key factor, as is sunlight, in the depletion of ozone. Stratospheric ozone protection awards since 1990, epa has recognized outstanding achievement in ozone layer protection. Ozone depletion describes two distinct but related phenomena observed since the late 1970s. What emissions from human activities lead to ozone depletion. The net gwps of halocarbons depend strongly upon the effectiveness of each compound for ozone destruction. Learn what cfcs are, how they have contributed to the ozone hole, and how the 1989 montreal.
Effects of ozone depletion ozone depletion is affecting the human health and environment negatively, as it allows the penetration of uv radiations to reach the earth. Presentations ppt, key, pdf logging in or signing up. The ozone layer refers to a region of earths stratosphere that absorbs most of the suns uv radiation. Measurements from satellitebased instruments show that this area of very low ozone concentration has developed over antarctica every year since about 1975. Ozone depletion also explains much of the observed reduction in stratospheric and upper tropospheric temperatures. Mar 21, 2020 ozone depletion, gradual thinning of earths ozone layer in the upper atmosphere caused by the release of chemical compounds containing gaseous chlorine or bromine from industry and other human activities. The depletion of the ozone describes two closely related but distinct phenomena which have been repeatedly observed since the latter 1970s.
Although it represents only a tiny fraction of the atmosphere, ozone is crucial for life on earth. Powerpoint is the worlds most popular presentation software which can let you create professional depletion of ozone layer powerpoint presentation easily and in no time. This helps you give your presentation on depletion of ozone layer in a conference, a school lecture, a business proposal, in a webinar and business and professional. Policy responses to ozone depletion mario molina and sherwood rowland showed in 1974 that cfc gases destroy ozone coordinating committee on ozone layer ccol established by unep in the 1970s vienna convention for the protection of the ozone layer held in 1985 montreal protocol to ban. Ozone layer depletion causes, effects and solutions 7. Nearly 90% of earths ozone is in the stratosphere and referred to as the ozone layer. Gwps including indirect effects of ozone depletion have been estimated fo r a variety of halocarbons cfcs, halons, hcfcs, etc.
If so, share your ppt presentation slides online with. Ozone depletion is affecting the human health and environment negatively, as it allows the penetration of uv radiations to reach the earth. Feb 12, 2018 far above earths surface, the ozone layer helps to protect life from harmful ultraviolet radiation. Life on earth is protected from the uv rays by a layer in the upper atmosphere known as the stratosphere, which surrounds earth. Apr 18, 2019 the ozone layer helps to protect life from harmful ultraviolet radiation. The ozone layer protects humans, animals, and plants from harmful ultraviolet rays. Management of ozone depleting substances reported to the toxics release inventory katherine sleasman u. Introduction under the montreal protocol on substances that deplete the ozone layer, article 7 of the protocol requires all parties, both developing countries also called article 5 countries and developed countries. Ozone depletion facts and information national geographic. Ozone layer depletion the emission of ods account for roughly 90% of total depletion of ozone layer in stratosphere.
Presentation on ozone depletion free download as powerpoint presentation. Ozone layer depletion causes, effects and solutions. Overall, ozone depletion increases with latitude with low levels of depletion at the equator and tropics, and highest depletion at the poles. The problems and causes associated with ozone depletion arise from human activities. B dobson inferred correctly that the cause of the warm stratosphere was heating by the absorption of ultraviolet solar radiation by ozone, and he set out to. The ozone layer is mainly found in the lower portion of the stratosphere. This presentation covers what ozone is, where it is located and why it is important to our environmentmainly blocking ultraviolet radiation from our sun. The ozone layer thus plays an important role by preventing the harmful uv radiations from penetrating into the earths lower atmosphere the troposphere. Ozone depletion has been observed over the past decades, and is most likely caused. This is a powerpoint presentation on ozone and ozone depletion.
Introduction under the montreal protocol on substances that deplete the ozone layer, article 7 of the protocol. This document contains information upon which the parties to the montreal. One important effect is that ozone depletion in the stratosphere increases the formation of photochemical smog, including ozone accumulation, in the lower troposphere. Effects of ozone depletion presentation for 11th higher ed. Ozone depletion atmospheric ozone layer depletion is a serious problem currently facing the world. Why the hole in the atmospheric ozone layer above us. The subtropical ground ozone concentration in northern hemisphere is twice the corresponding region in southern hemisphere 5. Greenhouse gases and ozone hole temperature and ozone take home points continued anthropogenic release of greenhouse gases, not only cfcs, into the atmosphere will enlarge the ozone holes, letting more harmful uv rays reach the earths surface. Certain industrial processes and consumer products result in the emission of halogen source gases to the atmosphere. Find powerpoint presentations and slides using the power of, find free presentations research about ozone ppt. View and download powerpoint presentations on depletion of ozone layer ppt. The ozone depletion has led to a worldwide concern as the thinning protective coat over earth is letting harmful ultraviolet light pass. Ozone depletion free download as powerpoint presentation.
Ppt effects of ozone depletion powerpoint presentation. Therefore many governments are taking measures to prevent ozone depletion. Stratospheric ozone depletion has further indirect health effects. Pdf there are many situations where human activities have significant effects on the environment. The ozone layer was discovered in 19 by the french physicists charles fabry and henri buisson. This paper traces the evolution of policy responses to stratospheric ozone depletion. Effects of ozone depletion is the property of its rightful owner.
Effects of ozone depletion 1 effects of ozone depletion 2 the discovery. Ozone layer depletion increases the amount of uvb that reaches the earths surface. Total bromine from halons has decreased from a peak of 8. Ozone can be bad every spring a hole in the layer of harmless ozone as big as the usa opens over antarctica, a smaller one develops over the arctic at the north pole this is the first signs that the ozone layer is. Nov 05, 2012 what is ozone layer and how it is getting depleted. Nearly 500 organizations, teams, and individuals from 40 countries have received stratospheric ozone protection awards for their exceptional leadership, personal dedication, and technical achievements. The natural distribution of ozone around the earth is.
The following reports document the research carried out in the second phase of. Ppt ozone layer depletion authorstream presentation. Ozone layer is an international treaty designed to protect the ozone layerby phasing out the production of numerous substances that are responsible forozone depletion. Ozone shown to be a natural atmospheric constituent. Ozone layer depletion penn state college of earth and. Causes of ozone layer depletion and its effects on human. If you would like to discuss your ideas or need help troubleshooting, use the ask an expert forum. Ozone layer depletion cause, effects, and solutions. B dobson and other scientists in measuring concentrations of chloride and ozone in the atmosphere g. Pdf causes of ozone layer depletion and its effects on. These gases bring chlorine and bromine to the stratosphere, which cause depletion of the ozone layer. The treaty is structured around several groups of halogenated hydrocarbonsthat deplete stratospheric. Near the ground, ozone forming as a result of chemical reactions involving traffic pollution and sunlight may cause a number of respiratory problems, particularly for young children. This timeline highlights the average area of the ozone hole between september 7th and october th as observed by nasa spacedbased instruments see colored bars and scale.
Ozone layer depletion is one of the major environmental issues which is getting thinner day by day as a. Ozone absorbs a band of ultraviolet radiation called uvb. With more uv radiation reaching the earth surface due to ozone depletion. Laboratory and epidemiological studies demonstrate that uvb causes nonmelanoma skin cancer and plays a major role in malignant melanoma development. The latter phenomenon is referred to as the ozone hole.
Policy responses to ozone depletion mario molina and sherwood rowland showed in 1974 that cfc gases destroy ozone coordinating committee on ozone layer ccol established by unep in the 1970s vienna convention for the protection of the ozone layer held in 1985 montreal protocol to ban substances that. This document contains information upon which the parties to the montreal protocol on. British atlantic survey research station, holly bay, antarctic coast. Protecting the ozone layer and reducing global warming undp. Learn how the montreal protocol has possibly helped reverse the decline of the ozone layer.
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