The latter phenomenon is referred to as the ozone hole. 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. 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. Effects of ozone depletion as ozone depletes in the stratosphere, it forms a hole in the layer. However, if you would like to change the initial conditions of the system, you might find out that the time threshold will be reduced or augmented. Pdf causes of ozone layer depletion and its effects on human. Ozone depletion effects software ozone for mac os v. Ozone depletion and the ozone hole have generated worldwide concern over increased cancer risks and other negative effects. Researchers indicate that many of the effects of ozone depletion on human health tend to apply for animals, too. This ozone layer sustains life on the earth by absorbing a great deal of uv ultra violet light radiating out of sun.
Let us see some of the important causes and effects of ozone layer depletion. Current mainstream epidemiologic research methods do not appear well adapted to analyze these health impacts, which involve complex systems influenced by human interventions or simpler processes that will take place in the future. Ozone layer protection european commission europa eu. The montreal protocol on substances that deplete the ozone layer requires periodic. The increase in the levels of uv rays lead to high rate of skin cancer and eye related problems. Learn about ozone depletion, its causes, and effects. Scribd is the worlds largest social reading and publishing site. International journal of environmental science and development, vol. Environmental effects and interactions of stratospheric ozone.
A close look at the evolution at the life on earth reveals that initially. The ozone layer is responsible for absorbing harmful ultraviolet rays, and preventing them from entering the earths atmosphere. It is present in traces less than 1 ppm in the atmosphere. These wavelengths cause skin cancer, sunburn and cataracts, which were projected to increase. Introduction the ozone layer is a layer in earths atmosphere which. The effects of the agreed countermeasures in terms of a recovery of the ozone layer, the. Learn more about the process, causes, and effects of ozone layer depletion. The main effect of ozone depletion is an increase in uvb rays reaching the earths surface causes.
This layer absorbs 9399% of the suns high frequency ultraviolet light, which is potentially damaging to life on earth. Ozone depletion is primarily caused by human activities. Causes of ozone layer depletion and its effects on human. These radiations can cause severe diseases in humans such as skin cancer, eye damage and genetic mutations etc 9. Ozone layer depletion can have some serious consequences on effects of human health, plants, marine ecosystems, biogeochemical cycles and earths environment.
Ozone layer depletion causes, effects and solutions 7. Find out what caused the ozone hole, and how the 1989 montreal. The ozone layer was discovered in 19 by the french physicists charles fabry and henri buisson. Ozone layer depletion is one of the major environmental issues which is getting thinner day by day as a result of increasing pollution.
Apr 18, 2019 the ozone layer helps to protect life from harmful ultraviolet 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. 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. Ozone o3 is a stratospheric layer that plays important role in providing support to humans for their survival. The natural distribution of ozone around the earth is.
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. But through domestic and international action, the ozone layer is healing and should fully recover by about 2065. Index terms bio effects, chlorofluorocarbon, ozone layer depletion, protection. No increase in patient visits or conditions attributable to uvb exposure was seen for periods of known ozone depletion compared with control periods. To the point where a seasonal hole in the ozone layer began to appear above the antarctic. Health and environmental effects of ozone layer depletion epa. The third body m absorbs the excess energy liberated by the above reaction and there by stabilise the o 3 ozone molecule. Health and environmental effects of ozone layer depletion. The ozone layer prevents most harmful uv wavelengths of ultraviolet light uv light from passing through the earths atmosphere. The effects of ozone depletion on the environment this layer of ozone that covers our planet like a blanket is slowly thinning due to the greenhouse gas emissions in the atmosphere.
Global warming and the depletion of the ozone o3 layer. The main effect of ozone depletion is an increase in uvb rays reaching the earths surface. Ozone depletion consists of two related events observed since the late 1970s. These chemicals are found in cleaning agents, aerosols, insulating foam, and refrigerants. Together, they describe what ozone, the ozone layer, ozone depletion and the ozone hole are, how ozone depletion occurs, mankinds influence, its impacts, and. Environmental effects of ozone depletion and its interactions with. The main things that lead to destruction of the ozone gas in the ozone layer. Global warming and the depletion of the ozone o3 layer the average surface temperature on earth has increased approximately 1.
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 hole enables harmful ultraviolet rays to enter the earths atmosphere. Depletion of stratospheric ozone o3, as commonly known as the hole in the ozone layer, is an issue of international concern. Anthropogenic climate changes and stratospheric ozone depletion affect human health in various ways. Ozone depletion, greenhouse gases, and climate change. Causes of ozone layer depletion, effects, prevention. Ozone layer depletion, its causes and its effects scribd.
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. Following is the list of some of the main ozone depleting substances and the sources from where they are released. The ozone layer acts as a natural filter, absorbing most of the suns burning ultraviolet uv rays. Causes, effects and solutions of ozone layer depletion. Environmental effects of ozone depletion montreal protocol. The world health organization was established in 1948 as a. Laboratory and epidemiological studies demonstrate that uvb causes nonmelanoma skin cancer and plays a major role in malignant melanoma development. Health impacts of climate change and ozone depletion. The stratospheric ozone layer forms a thin shield in the upper atmosphere, protecting life on earth from. What are the economic impacts of ozone layer depletion.
Lets have a look at some of the solutions to ozone layer depletion. The environmental impacts depend critically on the. Apr 27, 2017 learn about ozone depletion, its causes, and effects. Pdf causes of ozone layer depletion and its effects on. In fact whole world is vulnerable to its after affects. With depletion in ozone s layer, we humans are more prone to uv rays that reaches the earths surface. But many researchers do not agree with these predictions,14 and express their. Ozone layer the ozone layer or ozone shield refers to a region of earths stratosphere that absorbs most of the suns ultraviolet uv radiation. Ozone layer depletion increases the amount of uvb that reaches the earths surface. Ozone layer depletion pdf file the origin, causes, mechanisms and bio effects of ozone layer depletion as. Questions and answers about the environmental effects of the ozone layer depletion and. 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. 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. This is in sharp contrast to the situation in 2002, when the ozone hole was only two thirds of that size.
The ozone layer is a deep blanket in the stratosphere made up of comparatively high concentration of the ozone. There are many situations where human activities have. Within the stratosphere, the ozone layer is the portion that contains the highest. The depletion of atmospheric ozone also has detrimental effects on animals and the natural environment. In addition, uvb has been linked to the development of cataracts, a clouding of the. 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. Progress report 2003 united nations environment programme, environmental e. Let us see a few possible effects of the ozone layer depletion on the earths environment and also on the plants and animals. Download a pdf of ozone depletion, greenhouse gases, and climate change by the national research council for free. Ozone depletion fact sheet series kent air quality health effects of ozone depletion. One of the primary functions of the ozone layer is to filter out the majority of solar uv radiation that can reach the earths surface. What are the causes and effects of ozone depletion. 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.
Ozone depletion biology science fair project ideas. This website addresses stratospheric ozone issues, including the science of ozone depletion, epas regulatory approach to protecting the ozone layer, epa. Ozone is formed by photochemical reaction, followed by three body reaction. It is mainly located in the lower portion of the stratosphere from approximately 10 km to 50 km above earths surface. The causes, mechanism and bioeffects of ozone layer depletion on humans were addressed. The thinning is most pronounced in the polar regions, especially over antarctica. 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. For human populations, the most dangerous effects of exposure to greater uvb radiation are. The depletion of ozone layer allows entering of uv rays from sun into the earths atmosphere which is associated with a number of health related and environmental issues. United nations environment programme, environmental effects assessment panel. The most harmful effects of ozone depletion greentumble.
As a result, the realistic effects of ozone depletion cannot be examined, but the mechanism of chlorine catalyzed destruction of ozone can be understood and observed. It is an essential factor for many global, biological and environmental phenomena. Depletion to ozone layer depletion does not affect a region or a country. Mar 28, 2020 ozone depletion and uv radiations ozone depletion results in an increase of uvb radiation, but the shorter the wavelength, the stronger the increase within the uvb range. Find out what caused the ozone hole, and how the 1989 montreal protocol sought to put an end to ozone depletion. 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.
Tthe ozone hole and global he ozone hole and global global. Ozone depleting substances are the substances such as chlorofluorocarbons, halons, carbon tetrachloride, hydrofluorocarbons, etc. The fact that uv b can cause biological effects is well demonstrated by the familiar sunburn that follows overexposure to the sun. It contains high concentrations of ozone o3 relative to other parts of the atmosphere, although still. At the end of 20, 258 projects have been committed for an. Project report on ozone depletion environmental pollution. Effects and measures to protect ozone layer depletion. Another most feared aspect of pollution is depletion of ozone layer of the stratosphere. The ozone layer helps to protect life from harmful ultraviolet radiation. The ozone layer is a layer in the earths atmosphere which contains relatively high concentrations of ozone o3.
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. Pdf there are many situations where human activities have significant effects on the environment. The causes, mechanism and bio effects of ozone layer depletion on humans were addressed. About depletion of the ozone layer is the anticipated increase in the amounts of. However, various factors have led to the depletion and damage of this protective layer. Pdf this study was conducted at university of gujrat during 20142015 as a term paper for master of philosophy.
One of the main reasons for the widespread concern about depletion of the ozone layer is the anticipated increase in. The series is divided into three sections the science of ozone depletion 10, the impacts of ozone depletion 6, and managing ozone depletion 4. Ocular and dermatologic health effects of ultraviolet. Most ozone is found in the stratosphere upper part of the atmosphere, more than 10 to 16 kms from the surface of the earth. The emission of ozone depleting substances has been damaging the ozone layer. Environmental effects of ozone depletion ceda document repository. Ozone depletion in 1993, for example, average ozone values over. Ozone layer depletion, its causes and its effects free download as powerpoint presentation. The chlorofluorocarbon and the halons are potent ozone depletors.
Ozone depletion facts and information national geographic. Learn more about the process, causes, and effects of. 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 layer depletion cause, effects, and solutions. The ozone layer in the stratosphere occurs naturally, and it encircles the planet. Unfortunately, the ozone layer is currently under threat by manmade chemicals that remain in the atmosphere from their widespread use prior to being banned throughout most of the developed world in january 1996. Causes and effects of ozone layer depletion that are. Ozone depletion effects software free download ozone.
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