Jan 20, 2010 this yearly occurrence is called the ozone hole. Find out what caused the ozone hole, and how the 1989 montreal protocol sought to put an end to ozone depletion. Oct 27, 2017 hopefully, if we learn what are the effects of ozone depletion, we will finally do something to diminish the effects of climate change. However, various factors have led to the depletion and damage of this protective layer. Ozone layer depletion can have some serious consequences on effects of human health, plants, marine ecosystems, biogeochemical cycles and earths environment. Causes of ozone depletion the fact that the ozone layer was being depleted was discovered in the mid1980s. Let us have a detailed look at the various causes and effects of ozone layer depletion. Ozone layer depletion cause, effects, and solutions.
Most ozone is found in the stratosphere upper part of the atmosphere, more than 10 to 16 kms from the surface of the earth. Depletion of the ozone layer results in increased uv. Ozone layer, ozone hole, ozone depletion, recovery causes, effects, and solutions of ozone depletion which is asked in upsc, state. Ozone layer, depleting substances, health and environmental effects. 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. Thus, ozone layer depletion has become a major concern among the environmentalists. With depletion in ozone s layer, we humans are more prone to uv rays that reaches the earths surface.
Ultra violet radiation uvr is high energy electromagnetic wave emitted from the sun. Depletion of stratospheric ozone o3, as commonly known as the hole in the ozone layer, is an issue of international concern. Oct 06, 2016 the effects of ozone depletion ruqaiyah aqilah riduan. This is the cause for the nearly 80% of the ozone depletion. Ozone layer depletion is the thinning of ozone layer that protects the earth from the harmful uv radiations. Global ozone research and monitoring projectreport no. Pdf causes of ozone layer depletion and its effects on. Twenty questions and answers about the ozone layer. There are many causes for ozone depletion, but the most important process in both trends is.
Ozone layer depletion is one of the major environmental issues which is getting thinner day by day as a result of increasing pollution. Dec 14, 2015 what are the effects of ozone depletion. An increase in the levels of uvb reaching the earth as a result of ozone depletion may compound the effects that sun worshipping habits have already created. This paper analyses the causes and effects of ozone depletion. In comparison with the earlier assessments on effects of ozone depletion, the present report has a new section, frequently. We use your linkedin profile and activity data to personalize ads and to show you more relevant ads.
These chemicals are found in cleaning agents, aerosols, insulating foam, and refrigerants. Ozone gas, formation of the layer, location, role and smog. Environmental effects of ozone depletion ceda document repository. The effects of ozone depletion ruqaiyah aqilah riduan. It contains high concentrations of ozone o3 relative to other parts of the atmosphere. Environmental effects of ozone depletion, uv radiation and. Download file to see previous pages the effect of ozone depletion is more than what one would anticipate. Ozone layer depletion causes, effects and solutions 7. The ozone layer depletion is a major concern and is associated with a number of factors. The ozone layer was discovered in 19 by the french physicists charles fabry and henri buisson.
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. Explore the causes, effects, and solutions to ozone. 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 layer depletion, its causes and its effects ozone. Another major cause of large scale ozone depletion is rocket launches. Due to depletion of ozone uv rays are penetrating in troposphere and leading to more ozone formation in troposphere which is causing injurious effects on our health as ozone is toxic for our body 8. The consequences of these effects for the ozone layer are just being. Ozone depletion consists of two related events observed since the late 1970s. One of the main reasons for the widespread concern about. Ppt effects of ozone depletion powerpoint presentation. Unep is the worlds leading intergovernmental environmental organisation. The ozone layer functions as a protective screen, filtering out most of the suns harmful ultraviolet uv rays. Ozone depletion occurs when the natural balance between the production and destruction of stratospheric ozone is tipped in favour of destruction. The ozone layer acts as a natural filter, absorbing most of the suns burning ultraviolet uv rays.
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. The gradual thinning, reduction, or wearing out of the ozone layer in the stratosphere due to various human activities is called ozone depletion. These rays can cause skin cancer, cataract, damage to plants and crops and marine food. Most questions and answers are updates of those presented in previous ozone assessments, while others have been added or. The thickness of the ozone layer is measured in dobson units du. Ozone depletion describes two distinct but related phenomena observed since the late 1970s. In refrigeration and air conditioning applications, a blend is a mixture of two or. Ozone depletion project pdf the stratospheric ozone layer forms a thin shield in the upper atmosphere, protecting life on earth from.
Ozone layer depletion, its causes and its effects free download as powerpoint presentation. These climate factors are expected to combine in regionalspecific ways to affect the. The main effect of ozone depletion is an increase in uvb rays reaching the earths surface. Causes and effects of ozone layer depletion that are painfully true. This paper reveals the causes of ozone depletion, identifies the sources of ozone depleting. This ozone layer sustains life on the earth by absorbing a great deal of uv ultra violet light radiating out of sun. 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. Rivm report 481505011 technical report on stratospheric ozone. Chlorofluorocarbons or the cfc are the main cause of ozone layer depletion. But the one and the most important reason for ozone layer depletion is the production and emission of chlorofluorocarbons cfcs. Ozone layer depletion indicates less protection from the dangerous uvb radiation at the surface of our planet. The latter phenomenon is referred to as the ozone hole.
Unlike pollution which has several causes, there is one specific chemical compound that is responsible for the breakdown of the ozone layer. It is used for sterilization of water, removal of unpleasant odors and has very positicos treatments results in different ailments from ozone therapy. The environmental effects assessment panel eeap is one of three panels of. Progress report 2003 united nations environment programme, environmental e. Learn more about the process, causes, and effects of ozone layer depletion. Effects and measures to protect ozone layer depletion. Causes and effects of ozone layer depletion that are. Another most feared aspect of pollution is depletion of ozone layer of the stratosphere. Pdf causes of ozone layer depletion and its effects on human.
Apr 18, 2019 the ozone layer helps to protect life from harmful ultraviolet radiation. Ozone layer depletion cause, effects, and solutions byjus. Since 2000 rate of ozone depletion is increasing 0. Pdf this study was conducted at university of gujrat during 20142015 as a term paper for master of philosophy. This ozone depletion causes many effects on the environment which are presented here. It protects us from harmful uv rays that can have serious effects on animals, biodiversity and peoples health, including skin cancer and eye cataract. Environmental effects of ozone depletion, uv radiation and interactions. Ozone layer depletion increases the amount of uvb that reaches the earths surface. Effects of ozone depletion 1 effects of ozone depletion 2 the discovery. Ozone is an irritating, corrosive, colorless gas with a smell something like burning electrical wiring. A description of the state of the ozone layer and the causes and effects have recently. Rongxing guo, in crossborder resource management third edition, 2018. Causes of ozone layer depletion and its effects on human.
Ozone layer essay ozone depletion causes and effects. What are the principal steps in stratospheric ozone depletion caused by human activities. The thinning is most pronounced in the polar regions, especially over antarctica. The greenhouse gases not only affect the radiative balance, but also the chemical balance. Laboratory and epidemiological studies demonstrate that uvb causes nonmelanoma skin cancer and plays a major role in malignant melanoma development. There are many causes for ozone depletion, but the most important process in both trends is catalytic destruction of ozone by atomic chlorine and. One of the main reasons for the widespread concern about depletion of the ozone layer is the anticipated increase in. The ozone layer is mainly found in the lower portion of the stratosphere. The latest ozone layer depletion news is included at the foot of the page.
Cause and effects of ozone depletion research paper. What are the causes and effects of ozone depletion. These models work by combining satellite measurements of chemical. In 1985, using satellites, balloons, and surface stations, a team of researchers had discovered a balding patch of ozone in the upper stratosphere, the size of the united states, over antarctica. Apr 27, 2017 learn about ozone depletion, its causes, and effects. Causes and effects of ozone layer depletion that are truly dangerous duration.
The causes, mechanism and bioeffects of ozone layer depletion on humans were addressed. Pdf on jan 1, 2001, md safiuddin and others published global ozone depletion. The main cause of this is the release of cfcs, chlorofluorocarbonsozone depletion, n. Ozone protects life on earth by stopping uv ultraviolet rays of sun in the upper atmosphere, it does not allow them to reach at the ground level. In recent years these effects have become more prevalent because canadians are spending more time in the sun and are exposing more of their skin in the process. The main things that lead to destruction of the ozone gas in the ozone layer. Studies have argued that the influence of 7,500 tons of chlorine from cfc amounting annually to the stratosphere is minimal compared to 600 million tons of chlorine and fluorine other aggressive gas like salts escaping oceans as aerosols. The series is divided into three sections the science of ozone depletion 10, the impacts of ozone depletion 6, and managing ozone depletion 4. Ozone layer introduction the ozone layer refers to the ozone within stratosphere, where over 90% of the earths ozone resides. What is an ozone hole and causes and effects of ozone.
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. Causes of depletion, status and recovery of the ozone layer. Depletion of the ozone layer and its impacts canada. Effects of ozone depletion felt in the tropics by university of bern in rikitea, french polynesia, precipitation increased by 50 percent between the 1960s and the 1990s. Learn about ozone depletion, its causes, and effects. The ozone layer protects us from excessive levels of harmful ultraviolet uv radiation. 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. Ozone layer depletion cause, effects, and solutions biology. The problems and causes associated with ozone depletion arise from human activities. The ozone layer refers to a region of earths stratosphere that absorbs most of the suns uv radiation. Since the early 1970s, researchers across the globe have been working to understand the ozone layer ozone layerthe region of the stratosphere containing the bulk of atmospheric ozone.
The ozone layer lies approximately 1540 kilometers 1025 miles above the earths surface, in the stratosphere. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Ozone depletion is primarily caused by human activities. The chlorofluorocarbon and the halons are potent ozone depletors.
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. How ozone layer is depleting factors contributing its destruction. 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. The main effect of ozone depletion is an increase in uvb rays reaching the earths surface causes. The ozone layer is responsible for absorbing harmful ultraviolet rays, and preventing them from entering the earths atmosphere. There have been several concerns about ozone depletion. 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. Ozone layer present in the stratosphere protects the earth from harmful ultraviolet rays coming from the sun.
Fire extinguishers contain halons and methyl bromide in the form of pesticides can also be also a cause for the depletion. Observations and models show that antarctic ozone depletion influences. Causes, effects and solutions of ozone layer depletion. The main causes responsible for the depletion of the ozone layer are listed below. The natural distribution of ozone around the earth is. Unlike pollution which has several causes, there is one specific chemical compound that is. Ozone is a molecule consisting of three oxygen atoms o3 and has the property of being highly toxic because of its radioactivity. Health and environmental effects of ozone layer depletion. The ozone layer helps to protect life from harmful ultraviolet radiation. Oct 12, 2008 ozone depletion by clarisse, suleyman and suzy. British atlantic survey research station, holly bay, antarctic coast. The negative effects of excess tropospheric ozone contrast sharply with the protection from.
429 1018 483 1527 824 968 404 1586 181 721 332 835 446 1391 1069 528 84 688 1349 55 897 46 442 338 207 941 348 1064 1631 564 1393 637 1122 1002 123 143 1587 151 1264 1094 821 450 1233 169 564 635 263 552