Presentation on ozone depletion linkedin slideshare. Evs global warming, ozone depletion ppt ozone depletion. In the upper atmosphere, atmospheric gases absorbs the suns radiation, get ionized, and release molecules. Protecting the ozone layer department of the environment. Title vi for stratospheric ozone protection, signed into law. To the point where a seasonal hole in the ozone layer began to appear above the antarctic. Belt of ozone gas 15 to 50 kilometers above the earths surface where ozone is present in concentrations of a fewparts per million. Ozone absorbs a band of ultraviolet radiation called uvb.
The main effect of ozone depletion is an increase in uvb rays reaching the earths surface causes. Thus they add a lot to the depletion of ozone layer. Ozone layer depletion causes, effects and solutions 7. Smokestacks of thermal power plants, smelters and other industries. The evolution of ozone layer depletion, its impact on climate change, health and. 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. Les diablerets, switzerland by jeanpierre pommereau, june 2010. The subtropical ground ozone concentration in northern hemisphere is twice the corresponding region in southern hemisphere 5. If you would like to discuss your ideas or need help troubleshooting, use the ask an expert forum. There had been a lot of research on this topic over these years to find out all the possible causes that lead to this problem and the effects of ozone depletion.
Sometimes an ozone molecule reacts with an oxygen atom, creating two oxygen molecules, thus ending the cycle. Organization global ozone research and monitoring projectreport no. The layer of ozone gas is what which protects us from the harmful ultraviolet radiations of the sun. If the rate of ozone creation is equal to the rate of destruction, the total amount will remain the same. Project ozone layer depletion pdf the stratospheric ozone layer forms a thin shield in the upper atmosphere, protecting life on earth from. As the result of this reaction, they form chlorine and bromine. The main effect of ozone depletion is an increase in uvb rays reaching the earths surface. Seasonal mean of ambient ozone concentrations between 09. Nearly 90% of earths ozone is in the stratosphere and referred to as the ozone layer.
When chlorine nitrate, a chemical that ties up chlorine in an ozone safe form, was added to the hypothesis, the expected amount of ozone loss decreased. For this science project you will need to develop your own experimental procedure. Ozone depleting substances are those substances which deplete the ozone layer. Within the stratosphere, the ozone layer is the portion that contains the highest. Ozone depletion consists of two related events observed since the late 1970s. The process continues and the result is the reduction or depletion of ozone in the stratosphere. 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. Ozone depletion also explains much of the observed reduction in stratospheric and upper tropospheric temperatures. Vivert1448 priyanka n jeevan 1446 1453 rekha 1445 shabnam 1447. Environmental studies ozone depletion tutorialspoint. For examples, lensman999 unknown stresses that the ozone depletion will lead an increase in the percentage of skin cancer and cataracts. Evs global warming, ozone depletion ppt free download as powerpoint presentation.
Presentation on ozone depletion slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Testing the hypothesis of ozone depletion 3 of 3 chlorine monoxide is one of the products of ozone destruction. May 10, 2017 ozone depletion biology projects, biology science fair project ideas, biology topics for cbse school,icse biology experiments for kids and also for middle school, elementary school for class 5th grade,6th,7th,8th,9th 10th,11th, 12th grade and high school, msc and college students. So, while ozone is continually being replenished, it is also continually being destroyed. Causes of ozone layer depletion and its effects on human. Ozone concentrations in rural areas can be higher than in urban areas while ozone levels at high elevations can be relatively constant throughout the day and night.
One example of ozone depletion is the annual ozone hole over antarctica that has occurred during the antarctic spring since the early 1980s. At the end of 20, 258 projects have been committed for an. Since there is no other known source of chlorine monoxide, finding this chemical in the upper atmosphere would strongly support the idea that chlorine is destroying ozone. Pdf causes of ozone layer depletion and its effects on. Causes, effects and solutions of ozone layer depletion. The assessment documents the advances in scientific understanding of ozone depletion reflecting the thinking of the many international scientific experts who. 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.
It is very important to keep a watch on pollution and other harmful agents to prevent the loss of mankind from harmful uv. Ozone layer depletion cause, effects, and solutions. Ozone is a form of oxygen in which three atoms of oxygen combine to form a single molecule of ozone. As a result of its chemical composition, ozone is regarded as a special type of oxygen as it contains three oxygen molecules o3 as opposed to the usual two oxygen molecules o2.
Therefore, these factors bring a lot of problem on our daily life. Global warming, the phenomenon of rising average air temperatures near earths surface over the past 100 to 200 years. These radiations can cause severe diseases in humans such as skin cancer, eye damage and genetic mutations etc 9. Global warming and ozone layer depletion are two different problems see the sidebar misconceptions about global atmospheric change on page 95. Ozone depletion from the 1970s the depletion of the ozone layer started to capture the attention of the scientists, environmentalists, and the world community at large.
Since there is no other known source of chlorine monoxide, finding this chemical in the upper atmosphere would strongly support. Ozone depletion is primarily caused by human activities. Our experts wont do the work for you, but they will make suggestions and offer guidance if you come to them with specific questions. Newly detected ozonedepleting substances in the atmosphere pdf. Ozone in the stratospherea layer of the atmosphere between 15 and 50 kilometers 10 and. Ozone layer depletion is one of the most serious problems faced by our planet earth. Ozone is unstable and decomposes to molecular oxygen. It was first identified in 1970s due to the advent of supersonic aircraft, which fly in the lower stratosphere and emit nitrogen oxides. Vililia bsed ivs d ozone layer depletion causes, effects and solutions ozone layer depletion is one of the most serious problems faced by our planet earth.
The latter phenomenon is referred to as the ozone hole. Consumerism consumerism refers to protection or promotion of the interests of consumers. Emissions accumulation transport chemical reaction conversion removal polar stratospheric clouds increase ozone depletion by reactive halogen gases, causing severe ozone loss in polar regions in winter and spring. Certain compounds such as chlorofluorocarbons, cfcs, are released into the atmosphere by human activities, and these cfcs particularly, they are very, very unreactive at the atmospherical ground level and they go all the way up to the stratosphere and. The montreal protocol on substances that deplete the ozone layer was adopted in 1987 to. 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. Ozone depleting substances are the substances such as chlorofluorocarbons, halons, carbon tetrachloride, hydrofluorocarbons, etc. There are also springtime polar tropospheric ozone depletion. This proves ozone depletion is a big issue that needs attention. Ozone depletion ozone depletion is the steady decline of ozone in earths stratosphere the ozone layer, due to pollutants 34.
It is also one of the prime reasons which are leading to global warming. Ground ozone concentration is lower in polar and equatorial regions. Researchers indicate that many of the effects of ozone depletion on human health tend to apply for animals, too. The assessment may be reproduced or excerpted, without. There have been several concerns about ozone depletion. The growth of consumerism has led to many organizations improving their service to the customer. Joe farman, brian gardiner, and jonathan shanklin british atlantic survey research station, holly bay, antarctic coast in 1985, using satellites, balloons, and surface stations, a team of researchers had discovered a balding patch. Global warming is caused by the greenhouse effect, which is essential to life as we know it on planet earth. If you continue browsing the site, you agree to the use of cookies on this website. If we put a limit on the use of products which release gases causing ozone depletion, then we can restore the ozone level to its required limit. Choosing a backup generator plus 3 legal house connection options transfer switch and more. When cfc is released into the atmosphere, they mix with atmospheric. Evidence of ozone depletion in the stratosphere began to appear in the 1980s.
Solution on ozone layer depletion september 16 was voted the world ozone day in the year 1994 by the united nations general assembly. In lower atmosphere, atmospheric oxygen get dissociated and subsequently combines with. Ozone depletion, gradual thinning of earths ozone layer caused by the release of chemical compounds containing gaseous chlorine or. Although simplistic, the saying good up high and bad near by, sums up ozone in the atmosphere. Ozone depletion biology projects, biology science fair project ideas, biology topics for cbse school,icse biology experiments for kids and also for middle school, elementary school for class 5th grade,6th,7th,8th,9th 10th,11th, 12th grade and high school, msc and college students. Earths climate has changed over various timescales since the dawn of geologic time, and the force of human activities since the industrial revolution has been woven into the fabric of climate change.
Ozone layer depletion essay sample new york essays. A dynamic equilibrium is maintained between the formation and decomposition of ozone. Worst part is that these ods can live in the atmosphere for a long time. Ozone depletion and climate change environment canada. Use the information in the summary tab as a starting place. Frequently asked questions about the ozone layer ozone. These two are the major chemicals which disrupt the ozone layer.
Belt of ozone gas 15 to 50 kilometers above the earths surface where ozone is. Presentation1 evs ozone depletion atmosphere of earth. The process of ozone depletion pennsylvania state university. The natural distribution of ozone around the earth is. Ozone layer is a thin, fragileshield that contains relatively highconcentrations of ozone. The ozone layer is a deep blanket in the stratosphere made up of comparatively high concentration of the ozone. 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. Depletion of stratospheric ozone o3, as commonly known as the hole in the ozone layer, is an issue of international concern.
Ozone present in the stratosphere forms a protective layer and known as ozone layer, ozonosphere or ozone umbrella its concentration in atmosphere is about 10 ppm. 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. The problems and causes associated with ozone depletion arise from human activities. 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 affecting the human health and environment negatively, as it allows the penetration of uv radiations to reach the earth. Rivm report 481505011 technical report on stratospheric ozone. Hence, we should be aware and actions must be taken to ensure that ozone layer is not destroyed. It shields the entire earth frommuch of the harmful uv radiationthat comes from the sun 3.
What are the causes and effects of ozone depletion. 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. In this picture we are seeing how the ozone layer is destroyed and the effects of that destruction. This is not really a hole through the ozone layer, but rather a large area of the stratosphere with extremely low amounts of ozone. Following is the list of some of the main ozone depleting substances and the sources from where they are released. Our experts wont do the work for you, but they will make suggestions and offer guidance if you. Looking back over the scientific investigation of ozone depletion, we can see how the molinarowland hypothesis evolved with new data. Progress report 2003 united nations environment programme, environmental e. Ozone depletion biology science fair project ideas. The thinning is most pronounced in the polar regions, especially over antarctica. National aeronautics and the ozone hole space administratio n.
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