The subtropical ground ozone concentration in northern hemisphere is twice the corresponding region in southern hemisphere 5. In this picture we are seeing how the ozone layer is destroyed and the effects of that destruction. Therefore, these factors bring a lot of problem on our daily life. This proves ozone depletion is a big issue that needs attention. It has been found that this protective ozone layer is getting depleted because of the presence of cfc chlorofluorocarbon compounds. The natural distribution of ozone around the earth is.
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. Researchers indicate that many of the effects of ozone depletion on human health tend to apply for animals, too. Presentation on ozone depletion slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Vivert1448 priyanka n jeevan 1446 1453 rekha 1445 shabnam 1447. Ozone depletion refers to the wearing out or reduction of the amount of ozone in the stratosphere. Belt of ozone gas 15 to 50 kilometers above the earths surface where ozone is. Evs global warming, ozone depletion ppt ozone depletion. 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. It shields the entire earth frommuch of the harmful uv radiationthat comes from the sun 3. Ozone absorbs a band of ultraviolet radiation called uvb. Rivm report 481505011 technical report on stratospheric ozone. So, while ozone is continually being replenished, it is also continually being destroyed.
Ozone is a form of oxygen in which three atoms of oxygen combine to form a single molecule of ozone. Ozone in the stratospherea layer of the atmosphere between 15 and 50 kilometers 10 and. Presentation on ozone depletion linkedin slideshare. If you continue browsing the site, you agree to the use of cookies on this website. Hence, we should be aware and actions must be taken to ensure that ozone layer is not destroyed. These two are the major chemicals which disrupt the ozone layer. Organization global ozone research and monitoring projectreport no.
Project ozone layer depletion pdf the stratospheric ozone layer forms a thin shield in the upper atmosphere, protecting life on earth from. It was first identified in 1970s due to the advent of supersonic aircraft, which fly in the lower stratosphere and emit nitrogen oxides. The main effect of ozone depletion is an increase in uvb rays reaching the earths surface causes. Ozone depletion is affecting the human health and environment negatively, as it allows the penetration of uv radiations to reach the earth. Choosing a backup generator plus 3 legal house connection options transfer switch and more. Ozone depleting substances are the substances such as chlorofluorocarbons, halons, carbon tetrachloride, hydrofluorocarbons, etc. For this science project you will need to develop your own experimental procedure. Les diablerets, switzerland by jeanpierre pommereau, june 2010. For examples, lensman999 unknown stresses that the ozone depletion will lead an increase in the percentage of skin cancer and cataracts. Although simplistic, the saying good up high and bad near by, sums up ozone in the atmosphere. The ozone layer is a deep blanket in the stratosphere made up of comparatively high concentration of the ozone. Pdf causes of ozone layer depletion and its effects on. Newly detected ozonedepleting substances in the atmosphere pdf.
Seasonal mean of ambient ozone concentrations between 09. The montreal protocol on substances that deplete the ozone layer was adopted in 1987 to. Sometimes an ozone molecule reacts with an oxygen atom, creating two oxygen molecules, thus ending the cycle. Nearly 90% of earths ozone is in the stratosphere and referred to as the ozone layer.
It exists in the stratosphere between 20 and 50 kilometers above the surface. Ozone layer depletion cause, effects, and solutions. The process continues and the result is the reduction or depletion of ozone in the stratosphere. Evidence of ozone depletion in the stratosphere began to appear in the 1980s. Ozone depletion and climate change environment canada.
Our experts wont do the work for you, but they will make suggestions and offer guidance if you. What are the causes and effects of ozone depletion. Ozone is a colourless gas which is found in the stratosphere of our upper atmosphere. The thinning is most pronounced in the polar regions, especially over antarctica. Ozone depletion consists of two related events observed since the late 1970s. 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.
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 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. To the point where a seasonal hole in the ozone layer began to appear above the antarctic. Depletion of stratospheric ozone o3, as commonly known as the hole in the ozone layer, is an issue of international concern. Title vi for stratospheric ozone protection, signed into law. The ozone layer thus plays an important role by preventing the harmful uv radiations from penetrating into the earths lower atmosphere the troposphere. These chemicals are found in cleaning agents, aerosols, insulating foam, and refrigerants. When cfc is released into the atmosphere, they mix with atmospheric. 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.
Frequently asked questions about the ozone layer ozone. 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. 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. Global warming is caused by the greenhouse effect, which is essential to life as we know it on planet earth.
The growth of consumerism has led to many organizations improving their service to the customer. The main effect of ozone depletion is an increase in uvb rays reaching the earths surface. Ground ozone concentration is lower in polar and equatorial regions. Ozone depletion, gradual thinning of earths ozone layer caused by the release of chemical compounds containing gaseous chlorine or. Ozone layer depletion causes, effects and solutions 7. Evs global warming, ozone depletion ppt free download as powerpoint presentation. There have been several concerns about ozone depletion. In this line, we should be able to bring our ozone to its normal level by 2050. 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. Ozone depleting substances are those substances which deplete the ozone layer. Since there is no other known source of chlorine monoxide, finding this chemical in the upper atmosphere would strongly support.
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. 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. In lower atmosphere, atmospheric oxygen get dissociated and subsequently combines with. 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.
Ozone layer depletion is one of the most serious problems faced by our planet earth. This is not really a hole through the ozone layer, but rather a large area of the stratosphere with extremely low amounts of ozone. 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. 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. Ozone depletion biology science fair project ideas. 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. Worst part is that these ods can live in the atmosphere for a long time. These radiations can cause severe diseases in humans such as skin cancer, eye damage and genetic mutations etc 9. The assessment may be reproduced or excerpted, without.
National aeronautics and the ozone hole space administratio n. Looking back over the scientific investigation of ozone depletion, we can see how the molinarowland hypothesis evolved with new data. Global warming, the phenomenon of rising average air temperatures near earths surface over the past 100 to 200 years. Ozone depletion also explains much of the observed reduction in stratospheric and upper tropospheric temperatures. 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. There are also springtime polar tropospheric ozone depletion. Causes of ozone layer depletion and its effects on human. 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. The evolution of ozone layer depletion, its impact on climate change, health and. Global warming and ozone layer depletion are two different problems see the sidebar misconceptions about global atmospheric change on page 95. 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. Use the information in the summary tab as a starting place.
The assessment documents the advances in scientific understanding of ozone depletion reflecting the thinking of the many international scientific experts who. Ozone is unstable and decomposes to molecular oxygen. Testing the hypothesis of ozone depletion 3 of 3 chlorine monoxide is one of the products of ozone destruction. 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. If the rate of ozone creation is equal to the rate of destruction, the total amount will remain the same. Causes, effects and solutions of ozone layer depletion. Ozone layer is a thin, fragileshield that contains relatively highconcentrations of ozone. The problems and causes associated with ozone depletion arise from human activities. Ozone depletion ozone depletion is the steady decline of ozone in earths stratosphere the ozone layer, due to pollutants 34. The latter phenomenon is referred to as the ozone hole. Presentation1 evs ozone depletion atmosphere of earth. 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. It is very important to keep a watch on pollution and other harmful agents to prevent the loss of mankind from harmful uv. Protecting the ozone layer department of the environment.
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. A dynamic equilibrium is maintained between the formation and decomposition of ozone. Consumerism consumerism refers to protection or promotion of the interests of consumers. Solution on ozone layer depletion september 16 was voted the world ozone day in the year 1994 by the united nations general assembly. Smokestacks of thermal power plants, smelters and other industries. The layer of ozone gas is what which protects us from the harmful ultraviolet radiations of the sun. In the upper atmosphere, atmospheric gases absorbs the suns radiation, get ionized, and release molecules. 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. Environmental studies ozone depletion tutorialspoint.
As the result of this reaction, they form chlorine and bromine. Belt of ozone gas 15 to 50 kilometers above the earths surface where ozone is present in concentrations of a fewparts per million. At the end of 20, 258 projects have been committed for an. 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. The process of ozone depletion pennsylvania state university. Within the stratosphere, the ozone layer is the portion that contains the highest. One example of ozone depletion is the annual ozone hole over antarctica that has occurred during the antarctic spring since the early 1980s. It is also one of the prime reasons which are leading to global warming. Ozone layer depletion essay sample new york essays. 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. Following is the list of some of the main ozone depleting substances and the sources from where they are released.