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. There are many situations where human activities have. This is an image that shows ozone depletion because of the 3 rays that are poking through the layer, which represents the. With depletion in ozones layer, we humans are more prone to uv rays that reaches. The ozone layer protects humans, animals, and plants from harmful ultraviolet rays. Effects of ozone depletion ozone depletion, ozone layer, ozone. The ozone layer and its depletion linkedin slideshare. Pdf causes of ozone layer depletion and its effects on.
Ozone is good in the stratosphere because it absorbs all of the most energetic ultraviolet radiation uvc, most of the uvb radiation and some of the least energetic uv radiation uva. The ozone layer is a natural layer of gas in the upper atmosphere which protects humans and other living things from the harmful ultraviolet uv rays of the sun. Pdf causes of ozone layer depletion and its effects on human. Depletion of ozone layer essaytyper the depletion of the ozone layer. Winner of the standing ovation award for best powerpoint templates from presentations magazine. Biogeochemical cycles were the complex interactions of physical, chemical, geological and biological processes that. Stratospheric ozone depletion leads to an increase in uvb that reach the earths surface, where it can disrupt biological processes and damage a number of materials the fact that uvb can cause biological effects is well demonstrated by the familiar sunburn that follows overexposure to the sun. Depletion to ozone layer depletion does not affect a region or a country. Without understanding the situation, and without developing a deeper awareness about the lives we are living and the consequences it has such changes are.
Jan 07, 2016 polar vortex in the previous posts, we have studied about tropical cyclones and extra tropical cyclones temperate cyclone. In 1987, 56 countries agreed under what became known as the montreal protocol to cut cfc production. The evaporation of surface water through the stomata of leaves increases, which results in the decreased moisture content of the soil. The ozone layer is responsible for absorbing harmful ultraviolet rays, and preventing them from entering the earths atmosphere. The chlorine ion catalyzing o 3 depletion can take place in the gaseous phase, but it is dramatically. Ozone layer depletion is one of the major environmental issues which is getting thinner day by day as a. Find out what caused the ozone hole, and how the 1989 montreal protocol sought to put an end to ozone depletion. Health and environmental effects of ozone layer depletion. However, various factors have led to the depletion and damage of this protective layer. This typically results from higher uv levels reaching us on earth.
Ozone depletion and climate change environment canada. Thus, in this way the pscs are destroying the ozone layer at the poles. Polar vortex in the previous posts, we have studied about tropical cyclones and extra tropical cyclones temperate cyclone. Nasa provides daily images, data, and information from satellite instruments that monitor the ozone layer and the ozone hole ozone holea thinning break in the stratospheric ozone layer. Here we will study polar vortex circumpolar vortex which is a polar cyclone. Although ozone o3 is present in small concentrations throughout the atmosphere, most ozone about 90% exists in the stratosphere, in a layer between 10 and 50 km above the surface.
Ian grimmond ozone layer depletion when you walk outside, there is a pale blue molecule up in the stratosphere that is protecting you every second of every day of your life, this molecule is called ozone. The main consequence of a depleted ozone layer is a reduction in the protection it affords against harmful ultraviolet radiation uvb emanating from the sun. 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. This layer absorbs the radiations and prohibits them from entering the outer surface of the earth. Predictions of significant increases in the incidence of skin cancer resulting from continued use of cfcs spurred international action. Laboratory and epidemiological studies demonstrate that uvb causes nonmelanoma skin cancer and plays a major role in malignant melanoma development. Money and time are being spent on ozone repair, but the problem still exists.
The main effect of ozone depletion is an increase in uvb rays reaching the earths surface. Ozone is a colourless gas which is found in the stratosphere of our upper atmosphere. Ozone layer depletion can have some serious consequences on effects of human health, plants, marine ecosystems, biogeochemical cycles and earths environment. Designation of amount of such depletion as an ozone hole is made when the detected amount of depletion exceeds fifty percent. Effects of ozone depletion ozone depletion, ozone layer. Designation of amount of such depletion as an ozone hole is made when the. Apr 18, 2019 the ozone layer helps to protect life from harmful ultraviolet radiation. The net effect of these link ages is an intensification of both climate change and ozone depletion and possibly a delay in the recovery of the ozone layer. Ozone depletion results in greater amounts of uvb radiation that had an impact on terrestrial and aquatic biogeochemical systems. However, uv radiation is required in optimum intensity for both plants and animals. 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. Although it was long suspected, the first confirmed sighting of a large hole in the ozone layer was reported over antarctica in 1985. Punta arenas, chile, the southernmost city in the world 53s, with a population of 154 000, is located near the antarctic ozone hole aoh and has been regularly affected by high levels of ultravioletb uvb radiation each spring for the last 20 years. Effects of ozone depletion on the basis of energy ultraviolet rays are divided into three categories.
But many researchers do not agree with these predictions,14 and express their. Impacts of a projected depletion of the ozone layer by frank r. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. The proteins cells in plants undergo harmful mutations, all due to ultraviolet radiations. 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 depletion is allowing the uv radiation to earth surface.
Global warming and ozone layer depletion are two different problems see the sidebar misconceptions about global atmospheric change on page 95. Ozone in the lower atmosphere contributes to global warming and climate change. Environmental effects of ozone depletion ceda document repository. In addition, uvb has been linked to the development of cataracts, a clouding of the eyes lens. Ozone depletion is largely a result of manmade substances. If you continue browsing the site, you agree to the use of cookies on this website. That was an alarming situation for environmentalists all over the world because ozone layer depletion is directly proportional to some of the most destructive skin diseases including tumor formation. Ozone is harmful at ground level but high up the atmosphere ozone layer plays a vital role in the protection of all living beings. Ozone layer depletion and its effects 1575 words 7 pages.
Skin cancer and ultravioletb radiation under the antarctic ozone hole. These chemicals are found in cleaning agents, aerosols, insulating foam, and refrigerants. Layers of the atmosphere 45the suns utraviolet rays 68the ozone layer 9 3 4. Do ozone depleting gases and their substitutes have an effect on climate. Depletion of the ozone layer has consequences on humans, animals, and plants. Case study on ozone layer ozone depletion chlorofluorocarbon.
Ozone depletion consists of two related events observed since the late 1970s. The main effect of ozone depletion is an increase in uvb rays reaching the earths surface causes. Ozone layer depletion leads to decrease in ozone in the stratosphere and increase in ozone present in the lower atmosphere. The layer of ozone gas is what which protects us from the harmful ultraviolet radiations of the sun. Ozone layer depletion is one of the most serious problems faced by our planet earth. Ozone depletion biology science fair project ideas. The ozone layer has historically protected the earth from the harmful uv rays, although in recent decades this protection has diminished due to stratospheric ozone depletion. In fact whole world is vulnerable to its after affects. Humans research confirms that high levels of uv rays cause nonmelanoma skin cancer. This means if we can do something to balance the natural production with its depletion, there should not be a problem.
This is an image that shows ozone depletion because of the 3 rays that are poking through the layer, which represents the hole in the ozone layer. The world meteorological or ganization wmo, 1995 predicted that the depletion of the ozone layer peaked around 1998 and the layer would slowly recover by 2045 12. Ozone layer depletion causes, effects and solutions 7. Ozone layer depletion is one of the major environmental issues which is getting thinner day by day as a result of increasing pollution. Ozone depletion atmospheric ozone layer depletion is a serious problem currently facing the world. Environmental effects assessment panel, united nations environment. Learn more about the process, causes, and effects of ozone layer depletion. The ozone hole was much more seen as a hot issue and imminent risk compared to global climate change, as lay people feared a depletion of the ozone layer ozone shield risked increasing severe consequences such skin cancer, cataracts, damage to plants, and reduction of plankton populations in the oceans photic zone. The sun propagates ultraviolet radiations which as an adverse effect on living beings. Causes, effects and solutions of ozone layer depletion. Stratospheric ozone depletion leads to an increase in uvb that reach the earths surface, where it can disrupt biological processes and damage a number of materials.
Ozone o3 is a stratospheric layer that plays important role in providing support to humans for their survival. It is thickestnear the surface and thins out with height until iteventually merges with space. Oct 12, 2008 ozone depletion by clarisse, suleyman and suzy slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Causes and effects of ozone layer depletion that are. Ozone depletion by clarisse, suleyman and suzy slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Ozone depletion is primarily caused by human activities. It is present in traces less than 1 ppm in the atmosphere. Ozone layer research and technical resources us epa. Depletion of stratospheric ozone o3, as commonly known as the hole in the ozone layer, is an issue of international concern.
The montreal protocol on substances that deplete the ozone layer. The ozone layer acts as a natural filter, absorbing most of the suns burning ultraviolet uv rays. It is also one of the prime reasons which are leading to global warming. 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. Oct 27, 2017 the effects of ozone depletion on plants and animals massive amounts of uvb radiation that penetrate our atmosphere do not only affect humans, but also animals and plants. Ppt ozone layer depletion powerpoint presentation free to. People ask if we cannot produce our own ozone gas to replenish what is lost in the stratosphere. The thinning is most pronounced in the polar regions, especially over antarctica. In addition, uvb has been linked to the development of cataracts, a clouding of the. The smaller ozone hole in the spring of 2002 should not be interpreted as a sign of early recovery of the ozone layer. Additionally, it plays a major role in malignant melanoma development. How does ozone depletion affect uv levels and life on earth. Layers of the atmospherethe atmosphere is divided into five layers.
Environmental effects of ozone depletion montreal protocol unep. A polar vortex is a large pocket of very cold air, typically the coldest air in the northern hemisphere, which sits over the polar region during the winter season. There is a lot to learn about the breakdown of ozone in the atmosphere. Impacts of a projected depletion of the ozone layer.
Ppt ozone layer depletion powerpoint presentation free. 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 is made of oxygen and has a chemical equation of oo2. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. Scribd is the worlds largest social reading and publishing site. Environmental effects and interactions of stratospheric ozone. It is an essential factor for many global, biological and environmental phenomena. Depletion is usually worse the further from the equator and recently an ozone hole as defined by a distinct area of very low ozone levels has been detected above the north pole in the arctic. 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. B dobson and other scientists in measuring concentrations of chloride and ozone in the atmosphere g. Ozone is a form of naturally occurring gas and 90% of our planets ozone is in the stratosphere. Global warming is caused by the greenhouse effect, which is essential to life as we know it on planet earth.
Ozone layer depletion was first identified in late 1970s and the scientists claimed that 4% of the total ozone has been destroying per decade. 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. The ozone layer helps to protect life from harmful ultraviolet radiation. Mar 28, 2020 ozone depletion results in an increase of uvb radiation, but the shorter the wavelength, the stronger the increase within the uvb range. The exposure to these radiations is severely affecting all life forms on earth. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects. Causes of ozone layer depletion and its effects on human. The increase in the levels of uv rays lead to high rate of skin cancer and eye related problems. Ozone layer the ozone layer is basically naturally occurring gas in the region of stratosphere where ozone particles are accumulated 2. Case study on ozone layer free download as powerpoint presentation. Researchers indicate that many of the effects of ozone depletion on human health tend to apply for animals, too. Environmental effects of ozone depletion and its interactions with.
The latest ozone layer depletion news is included at the foot of the page. Presence of ozone in the lower atmosphere is considered as a pollutant and a greenhouse gas. Ozone depletion and climate change, or ozone hole and global warming in more popular terms, are environmental challenges whose connections have been explored and which have been compared and contrasted, for example in terms of global regulation, in various studies and books there is widespread scientific interest in better regulation of climate change, ozone depletion and air pollution, as. Although its a hole in the ozone layer that we like to talk about, there have been decreases in stratospheric ozone over populated regions in. Life on earth depends in part on a thin shell of gaseous ozone that stretches from about 10 to 25 miles above our heads, encompassing the planet like an invisible, protective shield. Case study depletion of ozone in the atmosphere the work of g. The natural distribution of ozone around the earth is. The main cause of 0 3 layer depletion is the presence of chlorine containing gases primarily cfc s and related hydrocarbons due to the presence of uv light, these gases dissociate and release chlorine atom, which then leads to o 3 destruction. Questions and answers about the environmental effects of the ozone layer depletion and. Ozone is bad in the troposphere because it is harmful to breathe and is the primary component. 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. Ozone in the upper atmosphere stratosphere plays a vital role in absorbing many of the.
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