This document, twenty questions and answers about the ozone layer. British atlantic survey research station, holly bay, antarctic coast. 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. Ozone depletion consists of two related events observed since the late 1970s. The ozone layer was discovered in 19 by the french physicists charles fabry and henri buisson. Causes, effects and solutions of ozone layer depletion. Certain industrial processes and consumer products result in the emission of halogen source gases to the atmosphere. The subtropical ground ozone concentration in northern hemisphere is twice the corresponding region in southern hemisphere 5. Explore the causes of ozone depletion and the effect on plankton, algae, plants, amphibians, and humans. Therefore many governments are taking measures to prevent ozone depletion.
Evolution of policy responses to stratospheric ozone depletion. Ozone layer depletion increases the amount of uvb that reaches the earths surface. Ozone depletion free download as powerpoint presentation. Ozone depletion potentials odps were a very important measure in the formulation of the montreal protocol and its amendments. Nov 05, 2012 what is ozone layer and how it is getting depleted. The causes, mechanism and bioeffects of ozone layer depletion on humans were addressed.
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, 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. Executive summary scientific assessment of ozone depletion actu. The designations employed and the presentation of the material in this publication do not. Ozone layer depletion penn state college of earth and. 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. Pdf there are many situations where human activities have significant effects on the environment.
Why the hole in the atmospheric ozone layer above us. Most questions and answers are updates of those presented in previous ozone assessments, while others have been added or. Stratospheric ozone depletion, ultraviolet radiation and. These gases are carried to the stratosphere layer of atmosphere where. Ozone absorbs a band of ultraviolet radiation called uvb. 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. Project report on ozone depletion environmental pollution. This presentation covers what ozone is, where it is located and why it is important to our environmentmainly blocking ultraviolet radiation from our sun.
Ozone shown to be a natural atmospheric constituent. This document contains information upon which the parties to the montreal. 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. Stratospheric ozone depletion noaas earth system research. The latter phenomenon is referred to as the ozone hole. 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. October average for total ozone over antarctica, 19551995 based on british measurements from weather balloons. Effects of ozone depletion is the property of its rightful owner. Introduction under the montreal protocol on substances that deplete the ozone layer, article 7 of the protocol. Ozone depletion is affecting the human health and environment negatively, as it allows the penetration of uv radiations to reach the earth. Use the information in the summary tab as a starting place. Most ozone is found in the stratosphere upper part of the atmosphere, more than 10 to 16 kms from the surface of the earth. Progress report 2003 united nations environment programme, environmental e.
B dobson and other scientists in measuring concentrations of chloride and ozone in the atmosphere g. Ozone layer depletion causes, effects and solutions. Ozone layer is an international treaty designed to protect the ozone layerby phasing out the production of numerous substances that are responsible forozone depletion. Ppt effects of ozone depletion powerpoint presentation. Management of ozonedepleting substances reported to the. National aeronautics and the ozone hole space administratio n. Ozone layer protection environmental protection department. The natural distribution of ozone around the earth is.
This paper traces the evolution of policy responses to stratospheric ozone depletion. Ground ozone concentration is lower in polar and equatorial regions. Total bromine from halons has decreased from a peak of 8. Presentation on ozone depletion free download as powerpoint presentation. It contains high concentrations of ozone o3 relative to other parts of the atmosphere. Although it represents only a tiny fraction of the atmosphere, ozone is crucial for life on earth. This is a powerpoint presentation on ozone and ozone depletion. A seminar on the depletion of the ozone layer, presented by ozoagu peter cj. Case study depletion of ozone in the atmosphere the work of g. 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. Ppt ozone layer depletion powerpoint presentation free to.
Learn how the montreal protocol has possibly helped reverse the decline of the ozone layer. Presentations ppt, key, pdf logging in or signing up. Stratospheric ozone depletion has further indirect health effects. Ozone layer depletion cause, effects, and solutions biology. Gwps including indirect effects of ozone depletion have been estimated fo r a variety of halocarbons cfcs, halons, hcfcs, etc. The thinning is most pronounced in the polar regions, especially over antarctica. Nearly 90% of earths ozone is in the stratosphere and referred to as the ozone layer. The antarctic ozone hole is recovering, while continuing to occur every year. Effects of ozone depletion presentation for 11th higher ed. Although ozone depletion has been a global issue, there is significant differences in distribution of ozone layer depletion across the world.
Nearly 500 organizations, teams, and individuals from 40 countries have received stratospheric ozone protection awards for their exceptional leadership, personal dedication, and technical achievements. Experiments show that ozone strongly absorbs solar ultraviolet uv radiation. One important effect is that ozone depletion in the stratosphere increases the formation of photochemical smog, including ozone accumulation, in the lower troposphere. These radiations can cause severe diseases in humans such as skin cancer, eye damage and genetic mutations etc 9. Management of ozone depleting substances reported to the toxics release inventory katherine sleasman u. Life on earth is protected from the uv rays by a layer in the upper atmosphere known as the stratosphere, which surrounds earth. What emissions from human activities lead to ozone depletion. Protecting the ozone layer department of the environment. Thank you tamil 10 days botany crash course for tnpsc forester exam. Let us have a detailed look at the various causes and effects of ozone layer depletion.
Laboratory and epidemiological studies demonstrate that uvb causes nonmelanoma skin cancer and plays a major role in malignant melanoma development. Depletion of stratospheric ozone o3, as commonly known as the hole in the ozone layer, is an issue of international concern. Overall, ozone depletion increases with latitude with low levels of depletion at the equator and tropics, and highest depletion at the poles. 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. It was agreed on 16 september 1987, and entered into force on 1 january 1989. Ozone depletion facts and information national geographic.
Causes of ozone layer depletion and its effects on human. It contains some videos and gif at thte end from an external source. With more uv radiation reaching the earth surface due to ozone depletion. Learn what cfcs are, how they have contributed to the ozone hole, and how the 1989 montreal. 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. Far above earths surface, the ozone layer helps to protect life from harmful ultraviolet radiation. The following reports document the research carried out in the second phase of. The net gwps of halocarbons depend strongly upon the effectiveness of each compound for ozone destruction.
The treaty is structured around several groups of halogenated hydrocarbonsthat deplete stratospheric. Find out what caused the ozone hole, and how the 1989 montreal protocol sought to put an end to ozone depletion. Feb 12, 2018 far above earths surface, the ozone layer helps to protect life from harmful ultraviolet radiation. Ppt ozone layer depletion powerpoint presentation free. Tthe ozone hole and global he ozone hole and global global. Our powerpoint presentation about ozone depletion, its effects and its causes.
View and download powerpoint presentations on depletion of ozone layer ppt. 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. 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. Ozone depletion has been observed over the past decades, and is most likely caused. Chapte r ozone depletion potentials, global warming. 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. The ozone layer is mainly found in the lower portion of the stratosphere. 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. 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. Update on ozonedepleting substances odss and other gases of.
Ozone layer depletion causes, effects and solutions 7. 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. Apr 18, 2019 the ozone layer helps to protect life from harmful ultraviolet radiation. Protecting the ozone layer and reducing global warming undp. This document contains information upon which the parties to the montreal protocol on. The problems and causes associated with ozone depletion arise from human activities. Normal ozone ozone layer depletion and its effects. If so, share your ppt presentation slides online with. Effects of ozone depletion 1 effects of ozone depletion 2 the discovery. The vienna convention for the protection of the ozone layer. Declines since 1996 in total column and stratospheric abundances of inorganic chlorine compounds are reason. Ozone layer depletion cause, effects, and solutions.
Ozone depletion also explains much of the observed reduction in stratospheric and upper tropospheric temperatures. 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. Temperature of the stratosphere is a key factor, as is sunlight, in the depletion of ozone. Money and time are being spent on ozone repair, but the problem still exists. 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. Unlike oxygen o2, ozone has a strong scent and is blue in color.
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 thus plays an important role by preventing the harmful uv radiations from penetrating into the earths lower atmosphere the troposphere. Ppt ozone layer depletion authorstream presentation. These gases bring chlorine and bromine to the stratosphere, which cause depletion of the ozone layer. Ozone layer depletion the emission of ods account for roughly 90% of total depletion of ozone layer in stratosphere. Cfcs, hcfcs, halons, methyl bromide, carbon tetrachloride, and methyl chloroform. There have been several concerns about ozone depletion. Measurements from satellitebased instruments show that this area of very low ozone concentration has developed over antarctica every year since about 1975. If you would like to discuss your ideas or need help troubleshooting, use the ask an expert forum. The ozone layer refers to a region of earths stratosphere that absorbs most of the suns uv radiation.
Ozone depletion atmospheric ozone layer depletion is a serious problem currently facing the world. Presentation on ozone depletion ozone depletion medicine. Learn what cfcs are, how they have contributed to the ozone. Pdf causes of ozone layer depletion and its effects on. Stratospheric ozone protection awards since 1990, epa has recognized outstanding achievement in ozone layer protection. A free powerpoint ppt presentation displayed as a flash slide show on id. For this science project you will need to develop your own experimental procedure. Scientific assessment of ozone depletion montreal protocol. Find powerpoint presentations and slides using the power of, find free presentations research about ozone ppt. Health and environmental effects of ozone layer depletion. The evolution of stratospheric ozone depletion policy can best be understood as a twostage process. The montreal protocol on substances that deplete the ozone layer. Find powerpoint presentations and slides using the power of, find free presentations research about depletion of ozone layer ppt. 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.
The depletion of the ozone describes two closely related but distinct phenomena which have been repeatedly observed since the latter 1970s. Ozone depletion ozone depletion chlorofluorocarbon. Ozone depletion describes two distinct but related phenomena observed since the late 1970s. Scribd is the worlds largest social reading and publishing site. This effects of ozone depletion presentation is suitable for 11th higher ed. Ozone in the lower atmosphere contributes to global warming and climate change.
Due to this, it is also taking a toll on our health and the environment. The ozone depletion has led to a worldwide concern as the thinning protective coat over earth is letting harmful ultraviolet light pass. The ozone story presentation ozone secretariat unep ozone distribution in the atmosphere scientific background i history 1839. The ozone hole is an area where the amount of ozone in the upper atmosphere is much lower than normal. 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. Plasmafire intl 7186205th street langley, bc canada v2y 1t1 6045329596 presents the story of ozone by dr.
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