What are the mechanisms of ozone depletion environmental sciences essay. Spectrometer toms multimedia files that show the history of the ozone hole. The ozone holes hover over the north and the south of earth. Questions and answers about the environmental effects of. The ozone hole in antarctica cool antarctica, pictures. Find out what caused the ozone hole, and how the 1989 montreal protocol sought to put an end to ozone depletion. Find ozone depletion stock images in hd and millions of other royaltyfree stock photos, illustrations and vectors in the shutterstock collection.
Unlike oxygen o2, ozone has a strong scent and is blue in color. Causes of ozone layer depletion and its effects on human. What are the various harmful effects of ozone layer depletion. The troposphere extends from the surface of the earth upto 12 km and stratosphere extends upto about 50 km from the surface of the earth. The envelope of air or different types of gases surrounding the earth is known as atmosphere. The chlorofluorocarbon and the halons are potent ozone depletors. To the point where a seasonal hole in the ozone layer began to appear above the antarctic. Depletion of the global ozone layer increased gradually in the 1980s and reached a maximum of about 5% in the early 1990s.
Global warming is caused by anthropogenic activities. Ozone layer present in the stratosphere protects the earth from harmful ultraviolet rays coming from the sun. A greenhouse or a farm house is a very big enclosure for the plants in a farm to save them from an extremely cold temperature in winter. One of the main reasons for the widespread concern about depletion of the ozone layer is the anticipated increase in. Recent developments related to chemicals commonly known as hfcs illustrate the situation. The increase of ultraviolet light due to depletion of the ozone layer will not only have adverse health effects, such as causing skin cancer and cataracts, but also. What are the mechanisms of ozone depletion environmental.
The production and emission of chlorofluorocarbons cfcs, is the leading cause of ozone layer depletion. Protecting the ozone layer department of the environment. If you continue browsing the site, you agree to the use of cookies on this website. Global warming and ozone layer depletion are two different problems see the sidebar misconceptions about global atmospheric change on page 95. Ozone depletion facts and information national geographic. Since about the 1970s, there has been a decrease in total volume of the ozone in the ozone layer, of about 4%, per decade.
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. Experts blame ozonelayer depletion on manmade chem. Uvb rays also seem to have a harmful effect on amphibian eggs, which may be one cause for the recent and drastic drop in frog populations. Immediately download the ozone depletion summary, chapterbychapter analysis, book notes, essays, quotes, character descriptions, lesson plans, and more everything you need for studying or teaching ozone depletion.
Let us have a detailed look at the various causes and effects of ozone layer depletion. Cfcs accounts for almost 80% of the total depletion of ozone. Ozone layer depletion is one of the major environmental issues which is getting thinner day by day as a result of increasing pollution. Download a pdf of ozone depletion, greenhouse gases, and climate change by the national research council for free. The maps were produced with data collected by statellite istruments, including the ozone monitoring instrument on the aura satellite. Ozone depletion atmosphere of the earth consists of a layer of ozone o 3 gas at the height of 30 to 60 km above the earth. Jul 27, 2007 the ozone layer blocks most of the uv. Ozone layer depletion cause, effects, and solutions biology.
But the one and the most important reason for ozone layer depletion is the production and emission of chlorofluorocarbons cfcs. Case study in interconnections of ozone depletion and. It is mainly located in the lower portion of the stratosphere from approximately 10 km to 50 km above earths surface. The ozone layer thus plays an important role by preventing the harmful uv radiations from penetrating into the earths lower atmosphere the troposphere. The main things that lead to destruction of the ozone gas in the ozone layer. The role of sunlight in ozone depletion is the reason why the antarctic ozone.
The causes, mechanism and bioeffects of ozone layer depletion on humans were addressed. Ozone ozone is a simple molecule of three oxygen atoms and it is present in the two lowest layers of the atmosphere troposphere and stratosphere. Due to global warming and green house effect most of the heat is trapped in troposphere which is the layer below the stratosphere. It is ideal photochemical maker due to its long life and stability. Ozone layer depletion cause, effects, and solutions. Its causes, effects, and possible solutions essay sample. Abstractthere are many situations where human activities have significant effects on the environment. Ozone depletioncauses, effects, solutions by tim wise on prezi. Project report on ozone depletion environmental pollution.
It is revealed that introduction of chlorof lourocarbons cfcs in the environment is the most rated cause. In semiconductor physics, the depletion region, also called depletion layer, depletion zone, junction region, space charge region or space charge layer, is an insulating region within a conductive, doped semiconductor material where the mobile charge carriers have been diffused away, or have been forced away by an electric field. These acids are formed primarily by nitrogen oxides and sulfur oxides released into the. Ozone layer ozone layer research papers discuss the depletion of the the ozone layer in the atmosphere. The term ozone depletion can refer to a number of distinct, but related phenomena. In your ozone layer term paper, consider how greenhouse gases contribute to the deletion of the ozone layer and promulgate global warming. Effects of uv rays on aquatic ecosystems ozone depletion causes increases in uv rayss effects on aquatic ecosystems by. We use cookies to make interactions with our website easy and meaningful, to better.
It is revealed that introduction of chloroflourocarbons cfcs in the environment is the most rated cause of said depiction. There are likely to be many other effects of ozone depletion. The depletion has lessened since then and now is about 3% averaged over the globe. Another most feared aspect of pollution is depletion of ozone layer of the stratosphere. Due to co poisoning decay vegetation life and increases in global warming and ozone layer depletion. Twenty questions and answers about the ozone layer. The phenomenon of ozone depletion, its causes and effects. At the end of 20, 258 projects have been committed for an. Some of the authors of this publication are also working on these related projects. The ahef is updated regularly to reflect new information and science.
Pdf download files stratospheric ozone depletion, ultraviolet radiation and health pdf 107kb pdf files for other chapters and for the complete summary. Ozone layer depletion causes, effects and solutions 7. Tthe ozone hole and global he ozone hole and global global. The ozone layer has been identified in term papers as important in the overall spectrum of the atmosphere. Causes, effects and solutions of ozone layer depletion. Indeed some 31 countries do not even make the list because they have already removed most of their forests and even if that remain are seriously fragmented and degraded.
Due to stratospheric ozone layer depletion uv radiations are penetrating in earth atmosphere which result in the production of reduced oxygen. Causes, effects and control strategies 5 deforestation are maintained. Significant depletion of the arctic ozone layer also occurs in. Polvani department of applied physics and applied mathematics, and department of earth and environmental sciences. Experts blame ozone layer depletion on manmade chemicals containing chlorine and bromine that are emitted from a. It makes a layer in the atmosphere which acts as a cover to the earth against ultraviolet radiation of the sun. Having a temperature causes the charge carriers to move about randomly, and therefore they tend to move from regions with high concentration to regions with low concentra. The depletion of the ozone layer is a major concern today. The effect of inhaling co can cause of hypoxic injury, neurological break and even death. Groundlevel ozone can have negative impacts on human health. Ozone depletion describes the observed loss of ozone in the stratosphere over the past 50 years. This volume presents the most uptodate data and theories available on ozone depletion, greenhouse gases. The thinning is most pronounced in the polar regions, especially over antarctica.
Within the stratosphere, the ozone layer is the portion that contains the highest. It is a complex issue full of uncertainties and controversies. Because global warming is caused by ozone depletion, ward concludes, reducing carbon dioxide emissions is unlikely to have any significant effect on reducing global warming. The ozone hole in antarctica the seasonal thinning of the ozone layer of the earths atmosphere above antarctica, so allowing abnormal amounts of ultraviolet light to reach the earths surface in those regions. It is ideal photochemical maker due to its long life and stability 1 34.
Because we have given more than 30 ppt in one place. This layer absorbs 9399% of the suns high frequency ultraviolet light, which is potentially damaging to life on earth. Pdf causes of ozone layer depletion and its effects on. Global warming is caused by the greenhouse effect, which is essential to life as we know it on planet earth. Please note that ozone depletion has nothing to do with global warming. Apr 18, 2019 the ozone layer helps to protect life from harmful ultraviolet radiation.
Causes of ozone layer depletion ozone depletion substances role of cfcs,hcfcs, chlorine atoms and other pollutants ozone hole mechanism of hole formation effects of ozone depletion as a human being what can we do to protect ozone layer. 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. There have been several concerns about ozone depletion. Given that these risks exist even when the ozone layer absorbs about 98 percent of uv light, a future with an even thinner ozone layer is scary indeed. Exposure to too much uv radiation is linked to skin cancer, cataracts, and depression of the immune system. Ozone layer has been found to be affected by certain natural phenomenon such as sun spots and stratospheric winds. Ozone depletion is allowing the uv radiation to earth surface. Carlos juarez, andrew berry, panchalee perera, lisa khairy what is ozone depletion. Why the hole in the atmospheric ozone layer above us. 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.
Review article in atmospheric and climate sciences january 2016 doi. Ppt ozone layer depletion powerpoint presentation free. The thermodynamics of climate change click here for a pdf. What effects does the depletion of ozone have on environmental processes and. These are categorized as ozone depleting substance ods. The updates presented in this report incorp orate new values for ods characteristics and an updated global emissions profile. But many researchers do not agree with these predictions,14 and express their.
A free powerpoint ppt presentation displayed as a flash slide show on id. The lack of air movement can result in a temperature inversion which causes a layer of still warm air to cover a layer of cool air, trapping any pollutants below the warm layer near ground level. 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. The greenhouse is covered with a kind of plastic walls which permits all radiations from the sun. Regarding ozone layer depletion, the answer is simple. Global warming and ozone layer depletion are two different problems see the. Article in international journal of advanced research 64. What are the various harmful effects of ozone layer. Causes and effects of ozone layer depletion 6868201200008. Laboratory and epidemiological studies demonstrate that uvb causes nonmelanoma skin cancer and plays a major role in malignant melanoma. See discussions, stats, and author profiles for this publication at. Ozone depletion, greenhouse gases, and climate change. Cause of global warming fossil fuel consumption is increasing rapidly to satisfy growing energy demand after the industrial revolution, which started at the end of the 18th century. It encompasses both a steady thinning of the ozone layer at midlatitudes and its catastrophic.
Effects and measures to protect ozone layer depletion. Questions and answers about the environmental effects of the ozone layer depletion and 3 climate change. 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. Personally i have found very little disagreement among atmospheric researchers on major causes of ozone depletion, particularly the role of manmade chlorofluorocarbons in the depletion. Highly reactive species like hydrogen peroxide is produced which has bad effects on human health. The ozone layer prevents most harmful uv wavelengths of ultraviolet light uv. In the 1980s, this frightening prospect motivated the scientific community and policy makers of the world to address the issue of cfc production, which resulted in the 1987 montreal protocol. Feb 11, 2010 climate change associated with atmospheric warming and depletion of the earths protective ozone layer are two separate but interrelated problems, intersecting in complex ways that challenge easy comprehension and also efforts to address them. Acid rain is precipitation containing harmful amounts of nitric and sulfuric acids. Ppt ozone layer depletion authorstream presentation. The layer formed by ozone is known as the ozone layer. Ozone layer depletion causes affecting factors ozone. The evolution of ozone layer depletion, its impact on climate.
Can the increased temperature due to global warming increase the deleterious effects of uvb radiation on plastics and wood products used. The ozone layer helps to protect life from harmful ultraviolet radiation. The overall effect is a decrease in the amount of ozone, though the rate of. Thousands of new, highquality pictures added every day. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Nov 30, 2015 natural causes of depletion of ozone layer. Ozone depletion simple english wikipedia, the free. Ozone layer research papers on the depletion of the the ozone. In addition, the sources of ozone depleting substances and the mechanism of ozone depletion have been. 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. Health effects framework ahef, which models adverse human health eff ects associated with a depleted stratospheric ozone layer.
Health and environmental effects of ozone layer depletion epa. The ozone hole is shown in purple above the antarctic on sept. Ozone depletion is the effect of the cfcs on the ozone layer. The main cause of depletion of ozone layer is cfcs chlorofluorocarbons,halonsmethyl chloroform,carbon tetrachloride, methyl bromide, etc.
This causes more ozone to be destroyed than created causing a hole in the ozone that allows the suns harmful ultraviolet rays to. Since this area is considered a little more contriversial i have referenced it more heavily. Ozone layer the ozone layer is basically naturally occurring gas in the region of stratosphere where ozone particles are accumulated 2. Ozone depletioncauses, effects, solutions by tim wise on.
The emission of ozonedepleting gases impacted the earths ozone layer a layer. Uv rays can cause skin cancer to those of us that work or play out side. But it causes only 12% depletion and that is also temporarily. A combination of low temperatures, elevated chlorine and bromine concentrations in the upper stratosphere are responsible for the destruction of ozone.
Questions and answers about the environmental effects of the. Environmental effects along with harming human health, air pollution can cause a variety of environmental effects. Estimates of ozone depletion and skin cancer incidence to examine the vienna convention achievements. Presentation on ozone depletion slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Ozone layer is also naturally broken down but there is a balance between its formation and natural depletion. The danger and prevention of ozone layer depletion. Ozone is a gas that is present in the ozone layer in the stratosphere of the earth. Warming open pdf file in javascript is caused by ozone depletion, not greenhouse gases.
The ozone layer protects us from the harmful rays of the sun. Memorandum updating atmospheric health effects model. Cause effect solution the ozone hole global warming 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 only be about 3 or 5 mm thick. Low temperatures, increase in the level of chlorine and bromine gases in the upper stratosphere are some of the reasons that leads to ozone layer depletion. The changes in area of forest by region and subregion are shown in table 1. Ozone depletion and global warming an integrated approach.
There, it will absorb almost all ultraviolet light which is harmful to many organisms. The problems and causes associated with ozone depletion arise from human activities. The ozone layer is a layer in the earths atmosphere which contains relatively high concentrations of ozone o3. Cfcs on atmospheric ozone depletion and global climate change.
If the ozone layer is thinned too much the uv rays might begin to harm plant life. Ozone in the upper atmosphere the stratosphere is referred to as the ozone layer and protects life on earth by absorbing most of the ultraviolet uv radiation emitted by the sun. The main driver of twentiethcentury atmospheric circulation changes in the southern hemisphere lorenzo m. Pdf lecture on ozone layer depletion find, read and cite all the research you need on researchgate. One of the main reasons for the widespread concern about depletion of the ozone layer. Global warming is caused by the greenhouse effect, which is essential to life as. Ozone depletion consists of two related events observed since the late 1970s. This ozone layer sustains life on the earth by absorbing a great deal of uv ultra violet light radiating out of sun.