Man has tried hard to deploy protective measures towards. The ozone layer helps to protect life from harmful ultraviolet radiation. Ozone layer depletion is one of the major environmental issues which is getting thinner day by day as a result of increasing pollution. Depletion of the ozone layer results in increased uv radiation reaching the earths surface, which in turn leads to a greater chance of overexposure to uv radiation and the related health effects of skin cancer, cataracts, and immune suppression. In lower atmosphere, atmospheric oxygen get dissociated and subsequently combines with molecular oxygen of the. There, it will absorb almost all ultraviolet light which is harmful to many organisms. Dramatically every spring you may have heard this called the ozone hole. 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. In the upper atmosphere, atmospheric gases absorbs the suns radiation, get ionized, and release molecules. Pdf on jan 1, 2001, md safiuddin and others published global ozone depletion. Ozone is a colourless gas which is found in the stratosphere of our upper atmosphere.
Project report on ozone depletion environmental pollution. As a result the total amount of ozone remains constant. The thinning is most pronounced in the polar regions, especially over antarctica. Ozone layer depletion is one of the most serious problems faced by our planet earth. The ozone layer is a region in the earths stratosphere that contains high concentrations of ozone and protects the earth from the harmful ultraviolet radiations of the sun. Ozone layer depletion cause, effects, and solutions. Ozone depletion was a good articles nominee, but did not meet the good article criteria at the time. Ozone in the ozone layer is formed by the action of solar ultraviolet light on oxygen. Causes, effects and solutions of ozone layer depletion. It contains high concentration of ozone o 3 in relation to other parts of the atmosphere, although still small in relation to other gases in the stratosphere. The latter phenomenon is referred to as the ozone hole. The ultraviolet uv rays emitted from sun are captured by ozone and thereby provide a stable ontological structure in the biosphere. This is apparently found in the lowest region of the stratosphere.
It is also one of the prime reasons which are leading to global warming. It has the potential to absorb around 9799% of the harmful ultraviolet radiations coming. With less ozone in the atmosphere, more ultravio let radiation strikes earth. The subtropical ground ozone concentration in northern hemisphere is twice the corresponding region in southern hemisphere 5. Ozone layer depletion and its control measures zilwach. Does depletion of the ozone layer increase groundlevel ultraviolet radiation. Ozone layer depletion, its causes and its effects free download as powerpoint presentation.
Ozone layer depletion, its causes and its effects ozone. The latest ozone layer depletion news is included at the foot of the page. Ozone layer is also naturally broken down but there is a balance between its formation and natural depletion. Ozone depletion is one of several factors, includ ing cloud cover and solar elevation, which affect ground level uv radiation. The ozone hole is an area where the amount of ozone in the upper atmosphere is much lower than normal. The ozone layer is found in the lower portion of the earths atmosphere. When cfc is released into the atmosphere, they mix with atmospheric. It contains some videos and gif at thte end from an external source. 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. Industries that manufacture things like insulating foams, solvents, soaps, cooling things like air conditioners. At the same time, however, the regime for the protection of the ozone layer is facing new challenges. The montreal protocol on substances that deplete the ozone layer 1 preamble the parties to this protocol, being parties to the vienna convention for the protection of the ozone layer, mindful of their obligation under that convention to take appropriate measures to protect human health and the environment against.
Yes, ultraviolet radiation at earths surface increases as the amount of overhead total ozone decreases, because ozone absorbs ultraviolet radiation from the sun. Implications of ozone depletion and the montreal protocol 20 questions. The maps were produced with data collected by statellite istruments, including the ozone monitoring instrument on the aura satellite. Ozone o 3 is a stratospheric layer that plays important role in providing support to humans for their survival. Once these issues have been addressed, the article can be renominated. Ozone layer introduction the ozone layer refers to the ozone within stratosphere, where over 90% of the earths ozone resides. It has been found that this protective ozone layer is getting depleted because of the presence of cfc chlorofluorocarbon compounds. 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. Ozone is unstable and decomposes to molecular oxygen. Ozone is an irritating, corrosive, colorless gas with a smell something like burning electrical wiring. Ozone depletion consists of two related events observed since the late 1970s. Unlike pollution, which has many types and causes, ozone depletion has been pinned down to one major human activity. Interactions between the troposphere and stratosphere provide a number of important connections between ozone depletion.
The ozone layer is a protective shield that blocks the suns harmful ultraviolet rays. 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. Ozone depletion ozone depletion chlorofluorocarbon. Pdf causes of ozone layer depletion and its effects on. The term ozone depletion can refer to a number of distinct, but related phenomena. The ozone layer is a deep blanket in the stratosphere made up of comparatively high concentration of the ozone. The earths ozone layer ozone layerthe region of the stratosphere containing the bulk of atmospheric ozone. There are many situations where human activities have. The montreal protocol on substances that deplete the ozone. Find out what caused the ozone hole, and how the 1989 montreal protocol sought to put an end to ozone depletion. But ozone layer thickness varies with altitude and. 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.
There are suggestions below for improving the article. The protection of ozone layer from these destructive elements is a subject of a complex regime comprising the 1985 vienna convention for the protection of ozone layer and the 1987 montreal protocol on substances that deplete ozone layer. The ozone layer protects the surface of the earth and its phenomena from stray rays from the sun. The ozone layer protects us from excessive levels of harmful ultraviolet uv radiation. Basic ozone layer science ozone layer protection us epa. Our powerpoint presentation about ozone depletion, its effects and its causes. Why the ozone layer is vital to life on earth the ozone layer is a protective shield that blocks the suns harmful ultraviolet rays from reaching the earths surface. Protecting the ozone layer department of the environment. Editors may also seek a reassessment of the decision if. The layer of ozone gas is what which protects us from the harmful ultraviolet radiations of the sun. 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. 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 ozone layer prevents most ultraviolet uv and other highenergy radiation from penetrating to the earths surface but does. Measurements by groundbased instruments and estimates. Ozone layer is a thin blanketlike layer that spreads over the atmosphere of the earth. The ozone layer forms a most important part of the earths stratosphere as it can absorb most of the uv radiation and prevent it from reaching the surface of the earth. Ozone depletion free download as powerpoint presentation. Ozone is a gas that is present in the ozone layer in the stratosphere of the earth.
To the point where a seasonal hole in the ozone layer began to appear above the antarctic. Ground ozone concentration is lower in polar and equatorial regions. Ozone and environment ozone o3 a gas composed of three atoms of oxygen bluish gas that is harmful to breathe nearly 90% of the earths ozone is in the stratosphere and is referred to as the ozone layer ozone absorbs a band of ultraviolet radiation called uvb ozonedepleting substances ods. It is an essential factor for many global, biological and environmental phenomena. Ozone depletion and climate change are indirectly linked because both ozonedepleting substances and their substitutes are greenhouse gases.
Pdf there are many situations where human activities have significant effects on the environment. Stratospheric ozone protection awards since 1990, epa has recognized outstanding achievement in ozone layer protection. Cfcs, hcfcs, halons, methyl bromide, carbon tetrachloride, and methyl chloroform. Measurements from satellitebased instruments show that this area of very low ozone concentration has developed over antarctica every year since about 1975. 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. It allows only the required doses of the suns solar energy to reach the earths surface. List of books and articles about ozone layer online. Nearly 500 organizations, teams, and individuals from 40 countries have received stratospheric ozone protection awards for their exceptional leadership, personal dedication, and technical achievements. Ozone layer the ozone layer is basically naturally occurring gas in the region of stratosphere where ozone particles are accumulated 2. Stratospheric ozone depletion, ultraviolet radiation and health. Find, read and cite all the research you need on researchgate.
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 layer depletion is simply the wearing out reduction of the amount of ozone in the stratosphere. Function of the ozone layer e ects of ozone depletion structure of the ozone layer formation of the ozone layer depletion of the ozone layer ozone layer recovery 8 of 31 lecture question where is the ozone layer and how concentrated is it. However, the ozone layer is destroyed by manmade chemicals known as ozonedepleting substances ods. Is depletion of the ozone layer the principal cause of climate change. Ozone layer depletion causes, effects and solutions 7. The ozone layer is not really a layer at all, but has become known as such because most ozone particles are scattered between 19 and 30 kilometers 12 to 30 miles up in the earths atmosphere, in a region called the stratosphere. If interested, you can purchase this powerpoint from.
The ozone layer lies approximately 1540 kilometers 1025 miles above the earths surface, in the stratosphere. Causes of ozone layer depletion and its effects on human. 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. This quick video discusses the role of the ozone layer and how cfcs can cause ozone depletion. It protects us from harmful uv rays that can have serious effects on animals, biodiversity and peoples health, including skin cancer and eye cataract. Depletion of this layer by ozone depleting substances ods will lead to higher uvb levels, which. Ozone o3 is a stratospheric layer that plays important role in providing support to humans for their survival. The ozone layer is basically naturally occurring gas in the region of stratosphere where ozone particles are accumulated 2. The ozone hole is shown in purple above the antarctic on sept.
Ozone depletion and climate change environment canada. The ozone layer or ozone shield is a region of earths stratosphere that absorbs most of the suns ultraviolet radiation. Ozone depletion simple english wikipedia, the free. Within the stratosphere, the ozone layer is the portion that contains the highest. A dynamic equilibrium is maintained between the formation and decomposition of ozone.
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