Ozone depletion also explains much of the observed reduction in stratospheric and upper tropospheric temperatures. List of books and articles about ozone layer online. There is a corresponding hole over the arctic that similarly appears in the spring, although in some years warmer winters there do not result in a major depletion of the ozone layer. During the seminar, all participants learnt about the montreal protocol, the importance of ozone layer for all species, including human. 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.
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 deplete. Progress report 2003 united nations environment programme, environmental e. The state of scientific understanding regarding the ozone depletion issue has advanced in recent years as a result of the concerted efforts of hundreds of scientists worldwide. 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 representations. A free powerpoint ppt presentation displayed as a flash slide show on id. Award of certificates to refrigeration and airconditioning technicians. Inexpensive light extremely stable, inert traditional refrigerants ammonia, sulfur dioxide, methyl chloride highly volatile caustic and toxic remove heat through vaporization of liquefied gas only adequate as refrigerants expensive heavy transport, storage. Jun 19, 2017 the best sleeping position for back pain, neck pain, and sciatica tips from a physical therapist duration. The ozone layer is found in the upper stratosphere and its primary function is to filter ultraviolet shortwave radiation that. No impact on ozone layer depletion and is commonly referred to as zero, reference. The ozone layer protects us from excessive levels of harmful ultraviolet uv radiation. The fact sheet series is aimed at students involved in key stage 4 of the national. Ozone layer depletion is the thinning of ozone layer that protects the earth from the harmful uv radiations. Ozone depletion occurs when the natural balance between the production and destruction of stratospheric ozone is tipped in favour of destruction.
They gave information on the montreal protocol, kigali amendment, impact of ods and phasing out, depletion of the ozone layer, ozone holes, and dangerous effect of the uv radiation and results of ods phasing out. Ecmwf seminar, september 2003 ozone assimilation in numerical weather prediction. To celebrate this day, nou of kyrgyz republic organized activities such as open lectures, environmental action and seminars in bishkek, osh and karakol cities. To the point where a seasonal hole in the ozone layer began to appear above the antarctic. When we speak of ozone depletion and ozone holes it means that the ozone up in the stratosphere produced by the sun in some way has disappeared. Ozone center organized open lecture devoted to world ozone day. Access information on research and technical resources related to ozone layer science. The layer shields the entire earthfrom much of the harmful ultravioletradiation that comes from the sun. If you continue browsing the site, you agree to the use of cookies on this website. Pdf causes of ozone layer depletion and its effects on. A global thinning of the ozone layer results as ozone rich air from the remaining ozone layer flows into the ozone poor areas. Ppt ozone layer depletion powerpoint presentation free to.
The role of ozone depletion in australias changing climate three speakers prominent in the field of ozone and climate science will be speaking on the relationship between ozone depletion and climate change. Protecting the ozone layer department of the environment. Protocol, ozone depletion and it health and environmental effects, of the work accomplished by eritrea on the implementation of the montreal protocol and future plans. When there was no ozone layer, life could only exist in. The fact is that ozone is also used for disinfection of air, water and for a lot of other industrial processes such as bleaching of paper pulp. This page provides links to research efforts led by organizations such as the national oceanic and atmospheric administration, the united nations environment program, an. Henk eskes, ecmwf seminar, september 2003 ozone assimilation in numerical weather prediction benefits for atmospheric chemistry science community. For nearly a billion years, ozonemolecules in the atmosphere haveprotected life on earth from theeffects of. Pdf there are many situations where human activities have significant effects on the environment. Presentation on ozone depletion linkedin slideshare. On 15th of september 2017, seminar under the motto caring for all life under the sun devoted to the international day of the ozone layer protection were held at bishkek mountain multidisciplinary college. Following is the list of some of the main ozone depleting substances and the sources from where they are released.
Vivert1448 priyanka n jeevan 1446 1453 rekha 1445 shabnam 1447. Misconceptions about the ozone layer depletion common mistake factglobal warming is caused the ozone layer protects theby the ozone hole which earth from the suns harmful uv rays. Ozone depletion and climate change, or ozone hole and global warming in. Odp is a relative value of the ozone destructive potential of a chemical substance by unit weight emitted into atmosphere, with the unit weight of cfc11 as 1. Since india already receives high doses of ultraviolet uvb radiation, and is at the threshold go to speak, effects of ozone layer depletion. The wri report is entirely designed to blame developing countries for sharing the responsibility for global warming. Jan 30, 2012 the ozone layerthe ozone layer is a deep layer in thestratosphere, encircling the earth,that has large amounts of ozone in it. It is found largely in the stratosphere that extends from about 6 km at the poles and 17 km at the equator to about 50 km above the earths surface.
Science of ozone layer depletion 12th th march, 2007 jaipur cfc, halon, ctc, methyl chloroform, methyl bromide and hcfc. Ground ozone concentration is lower in polar and equatorial regions. 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. Presentation on ozone depletion slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Multiyear data base of 4d ozone fields, consistent with the available satellite observations, consistent with the dynamical state of the atmosphere science questions.
Like an infection that grows more and more virulent, the continentsize hole in earths ozone layer keeps ge. As worldwide controls reduce the release of cfcs and other ozoneeating substances, nature will repair the ozone layer. The state of scientific understanding regarding the ozonedepletion issue has advanced in recent years as a result of the concerted efforts of hundreds of scientists worldwide. Most ozone is found in the stratosphere upper part of the atmosphere, more than 10 to 16 kms from the surface of the earth. B dobson and other scientists in measuring concentrations of chloride and ozone in the atmosphere g. When there was no ozone layer, life could only exist in the sea. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects. 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. Title vi for stratospheric ozone protection, signed into law. The concern is because of the fact that the ozone layer plays a protective role, screening the earth from harmful ultraviolet radiations. Ozone is a very reactive molecule that has a very strong oxidizing ability. When there was no ozone layer, life could only exist in the sea protect the ozone layer. The subtropical ground ozone concentration in northern hemisphere is twice the corresponding region in southern hemisphere 5. Ozone layer research and technical resources us epa.
Another misconception is that ozone layer depletion causes global warming by letting in extra solar radiation. Cfcs nonflammable nontoxic trap heat good insulators. Indias integrated approach to protect the ozone layer. Project ozone layer depletion pdf the stratospheric ozone layer forms a thin shield in the upper atmosphere, protecting life on earth from. The ozone layer and its depletion linkedin slideshare. Unlike oxygen o2, ozone has a strong scent and is blue in color. Nearly 90% of earths ozone is in the stratosphere and referred to as the ozone layer. The concept of ozone depletion potential odp is widely used wuebbles et al.
Henk eskes, royal netherlands meteorological institute. Analyses of tcfps potential impact on atmospheric ozone. At the end of 20, 258 projects have been committed for an. Our new crystalgraphics chart and diagram slides for powerpoint is a collection of over impressively designed datadriven chart and editable diagram s guaranteed to impress any audience. Causes of ozone layer depletion and its effects on human. This idea connects two issues global warming and depletion of ozone in the upper atmosphere inappropriately, which diverts attention from the main cause of global warming. R e p o r t on celebration of the international ozone day 2017 bishkek 2017. Although natural phenomena can cause temporary ozone loss, chlorine and bromine released from manmade compounds such as cfcs are now accepted as the main cause of this. From protecting the ozone layer to preventing global warming. The biggest cause for this is the use of substances like freon. This year 16 september 2015 was celebrated nationally for the 11th time.
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. Eritrea has been commemorating the ozone layer 16, september 2015 for the preservation of the ozone layer ever since it became party to both the vienna convention and the montreal protocol in 2005. The thinning of the ozone layer has increased the risk that australians already face from overexposure to uv radiation from an outdoor lifestyle. Within the stratosphere, the ozone layer is the portion that contains the highest. 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. The earths surface depletion of the ozone the ozone layer decomposit ion of cfcs and other substances by sunlight. Stratospheric ozone protection awards since 1990, epa has recognized outstanding achievement in ozone layer protection. These radiations can cause severe diseases in humans such as skin cancer, eye damage and genetic mutations etc 9. The ozone layer prevents most ultraviolet uv and other highenergy radiation from penetrating to the earths surface. Ozone depletion potential an overview sciencedirect topics.
Case study depletion of ozone in the atmosphere the work of g. Scientists predict that ozone depletion should peak around year 2010. As a result, there has been a general thinning of the ozone layer over most of the globe, including between five to nine per cent depletion over australia since the 1960s. Designation of amount of such depletion as an ozone hole is made when the detected amount of depletion exceeds fifty percent.
It is present in traces less than 1 ppm in the atmosphere. Nearly 500 organizations, teams, and individuals from 40 countries have received stratospheric ozone protection awards for their exceptional leadership, personal dedication, and technical achievements. Ozone depletion describes two distinct but related phenomena observed since the late 1970s. 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. Report on activities devoted to the international day of. Ozone depletion has largely been controlled through operative pediatric urology pdf the montreal. By year 2065 stratospheric ozone should return to the amount present in 1980. Depletion of stratospheric ozone o3, as commonly known as the hole in the ozone layer, is an issue of international concern. Location of stratosphere thermosphere exosphere troposphere mesosphere stratosphere 10 km 40 km 50 km 300 km 400 km. Prevent global warming ministry of economy, trade and industry. Solstice foam blowing agents unido russia september 2015. Ozone depleting substances are the substances such as chlorofluorocarbons, halons, carbon tetrachloride, hydrofluorocarbons, etc. Pilasing these cllemicais out is imperative not only to preserve the ozone layer, but to stabilize tile earth s.
Ozone absorbs a band of ultraviolet radiation called uvb. Solomon and albritton, 1992 as a measure of the effectiveness of a given compound in removing ozone, relative to a standard compound, which is taken to be cfc11. Ozone layer depletion cause, effects, and solutions. Hole in the ozonewas created by chemicals layer has been caused bylike cfc. Ozone exists within both the tropospheric and stratospheric zones of the earths atmosphere in the troposphere, ground level ozone is a major air pollutant and primary constituent of photochemical smog in the stratosphere, the ozone layer is an essential protector of life on earth as it absorbs harmful uv radiation before it reaches the earth. The ozone depletion phenomenon the ozone depletion.
Stratospheric ozone is the ozone that is formed in the atmosphere with the rays from the sun as source of energy. Ozone in the ozone layer is formed by the action of solar ultraviolet light on oxygen. The chlorofluorocarbon and the halons are potent ozone depletors. Cfcs and other substances are decomposed by the influence of strong ultraviolet light from the sun. The natural distribution of ozone around the earth is. 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. One of the main reasons for the widespread concern about depletion of the ozone layer is the anticipated increase in. Ozone depletion is affecting the human health and environment negatively, as it allows the penetration of uv radiations to reach the earth. The latter phenomenon is referred to as the ozone hole. Why the hole in the atmospheric ozone layer above us.