The ozone layer is found in the upper regions of the stratosphere where it protects the earth from the harmful ultraviolet rays of the sun. Ozone is harmful at ground level but high up the atmosphere ozone layer plays a vital role in the protection of all living beings. Hence, cfcs are transporting agents that are responsible for damaging the ozone layer. The concentration of ozone in the ozone layer is usually under 10 parts ozone per million 5. Approximately 90 percent of the atmospheres ozone occurs from 1018 km 611 miles to about 50 km about 30 miles above earths surface. Ozone depletion and the environment there is overwhelming scientific evidence that manmade chemicals are destroying the ozone layer nobel prizes have already been awarded for the research. The main things that lead to destruction of the ozone gas in the ozone layer. In the region between about 10 kilometres and about 50 kilometres above ground, the atmosphere contains more ozone o 3. Ian grimmond ozone layer depletion when you walk outside, there is a pale blue molecule up in the stratosphere that is protecting you every second of every day of your life, this molecule is called ozone. This layer absorbs 9799% of the suns high frequency ultraviolet light, which is potentially damaging to life on earth. Ozone hole definition is an area of the ozone layer as near the south pole that is seasonally depleted of ozone. What is the ozone layer and how does it affect you. Pdf causes of ozone layer depletion and its effects on.
The ozone layer means the layer of atmospheric ozone above the planetary boundary layer. The ozone layer is a layer of ozone high up in the earths atmosphere stratosphere. The ozone layer is mainly found in the lower portion of the stratosphere. Ozone layer depletion and its effects 1575 words 7 pages. An odp of 10, for example, is ten times as effective in depleting ozone per tonne, than. Ozone simple english wikipedia, the free encyclopedia. The importance of the ozone layer and its structure you should know that the ozone layer is located at the height from 20 to 40 km above the sea level, and it is located in the lower part of the stratosphere layer, as it is the first layer. This layer absorbs the radiations and prohibits them from entering the outer surface of the earth. Solution on ozone layer depletion september 16 was voted the world ozone day in the year 1994 by the united nations general assembly. 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. The ozone layer is basically naturally occurring gas in the region of stratosphere where ozone particles are accumulated 2. Ppt ozone layer depletion authorstream presentation. It was agreed on 16 september 1987, and entered into force on 1 january 1989.
Learn more about the process, causes, and effects of ozone layer. Causes of ozone layer depletion and its effects on human. Causes and effects of ozone layer depletion that are. Stratospheric ozone depletion, ultraviolet radiation and. For example, the sage and toms satellite instruments have provided essential global views of stratospheric ozone for several decades. The ozone layer or ozone shield is a region of earths stratosphere that absorbs most of the suns ultraviolet radiation. Twenty questions and answers about the ozone layer. The exact amount of ozone that can be found varies, the seasons influence it. It is an irritating, pale blue gas that is explosive and toxic.
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. But through domestic and international action, the ozone layer is healing and should fully recover by about 2065. Ozone layer definition is an atmospheric layer at heights of about 20 to 30 miles 32 to 48 kilometers that is normally characterized by high ozone content which blocks most solar ultraviolet radiation from entry into the lower atmosphere. Ozone layer definition 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. This, in turn, will lead to the breakdown of ozone. Ozone layer is also naturally broken down but there is a balance between its formation and natural depletion. The ozone layer is the part of the earths atmosphere that has the most ozone in it. Ozone, triatomic allotrope of oxygen a form of oxygen in which the molecule contains three atoms instead of two as in the common form that accounts for the distinctive odor of the air after a thunderstorm or around electrical equipment.
Ozone layer introduction the ozone layer refers to the ozone within stratosphere, where over 90% of the earths ozone resides. This proves ozone depletion is a big issue that needs attention. Ozone is a form of oxygen, but whereas molecules of ordinary oxygen each contain two atoms, the ozone molecule has three. Ozone is an irritating, corrosive, colorless gas with a smell something like burning electrical wiring. Timeline of stratospheric ozone depletion and observations. These radiations can cause skin cancer in the humans. This website addresses stratospheric ozone issues, including the science of ozone depletion, epas regulatory approach to protecting the ozone layer, epaapproved alternatives to ozone depleting substances, and sun safety. It is an allotrope of oxygen that is much less stable than the diatomic allotrope o 2, breaking down with a half life of about half an hour in the lower atmosphere to o 2. The vienna convention for the protection of the ozone layer 3 2. This happens when the chlorine and bromine atoms in the atmosphere come in contact with ozone and destroy the ozone molecules. However, various factors have led to the depletion and damage of this protective layer. Photolysis of atmospheric ozone in the ultraviolet region pdf. But ozone layer thickness varies with altitude and seasonal change.
Ozone layer definition of ozone layer by the free dictionary. The ozone layer contains less than 10 parts per million of ozone, while the average ozone concentration in. 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 only be about 3 or 5 mm thick. Ozone o 3, or trioxygen, is a triatomic molecule consisting of three oxygen atoms. The exact amount of ozone varies, depending on the seasons and the location. In industrial societies ozone is now being generated at ground level by the action of sunlight on gaseous pollutants, but the earths natural ozone factory is the stratosphere. Uv rays can cause sunburn and damage the dna, the ozone layer absorbs most of the harmful radiations and protects us. Commons category link is defined as the pagename articles with curlie links.
Ozone holes are popular names for areas of damage to the ozone layer. The ozone layer is a layer of ozone high up in the earths atmosphere stratosphere, between approximately 10 kilometres and 50 kilometres above earths surface. Ozone layer definition of ozone layer by merriamwebster. February 20 learn how and when to remove this template message. It contains high concentrations of ozone o3 relative to other parts of the atmosphere. At the end of 20, 258 projects have been committed for an. Ozone layer is an international treaty designed to protect the ozone layerby phasing out the production of numerous substances that are responsible forozone depletion. The vienna convention for the protection of the ozone layer. Find, read and cite all the research you need on researchgate. The ozone layer refers to a region of earths stratosphere that absorbs most of the suns uv radiation. To this end the parties shall, in accordance with the means at their disposal and their capabilities. The importance of ozone is defined by the fact that it protects the earth from harmful ultraviolet rays from the sun. The ozone layer was discovered in 19 by the french physicists.
The stratospheric ozone layer is a normal part in the earths atmosphere that absorbs highfrequency ultraviolet uv rays and protects us from their damaging effects. Ozone layer depletion causes, effects and solutions 7. Tthe ozone hole and global he ozone hole and global global. As a result the total amount of ozone remains constant. Ozone is diamagnetic, which means that its electrons are all paired.
Ozone layer depletion is the thinning of the ozone layer present in the atmosphere. Adverse effects means changes in the physical environment or biota, including changes in climate, which have significant. A region of the atmosphere lying mostly in the stratosphere, between about 15 and 30 kilometers 10 and 20 miles in altitude, containing a relatively high concentration of ozone that absorbs solar ultraviolet radiation in a wavelength range not screened by other atmospheric components. Presentations ppt, key, pdf logging in or signing up.
To the point where a seasonal hole in the ozone layer began to appear above the antarctic. Ozone layer simple english wikipedia, the free encyclopedia. Ozone is a special form of oxygen, made up of three oxygen atoms. Kaufman, in clinical respiratory medicine fourth edition, 2012. There are many situations where human activities have significant effects on the environment. The resulting pdf file may be inserted into powerpoint, or used like any. Ozone layer definition, the layer of the upper atmosphere where most atmospheric ozone is concentrated, from about 8 to 30 miles 12 to 48 km above the earth, with the maximum ozone concentration occurring at an altitude of about 12 miles 19 km. In the 1970s, people all over the world started realizing that the ozone layer was getting thinner and that this was a bad thing. This layer absorbs between 93 and 99 per cent of the ultraviolet radiation from the sun. Odp measures the relative impact on ozone depletion per tonne of gas. Within the stratosphere, the ozone layer is the portion that contains the highest. 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 layer depletion is one of the major environmental issues which is getting thinner day by day as a result of increasing pollution.
The importance of the ozone layer and its structure. Ozone hole definition of ozone hole by merriamwebster. For example, paper soaked in a mixture of starch and potassium iodide will change color when exposed to ozone. One chlorine can destroy 100,000 molecules of ozone. Hence, we should be aware and actions must be taken to ensure that ozone layer. The chlorofluorocarbon and the halons are potent ozone depletors. Without this ozone layer things would not have been able to live on the surface of our planet. The first report of depletion in o 3 layer came out in the 1980s by an atmospheric scientist in antarctica. In a warmer world, patterns of personal exposure to solar radiation e. The sun propagates ultraviolet radiations which as an adverse effect on living beings.
Ozone layer, region of the upper atmosphere, between roughly 15 and 35 km 9 and 22 miles above earths surface, containing relatively high concentrations of ozone molecules. The ozone layer is a layer in earths atmosphere which contains relatively high concentrations of ozone o3. 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 ozone layer helps in absorbing the ultraviolet uv rays of the sun which are harmful to human beings. It covers the entire planet and protects life on earth by absorbing harmful ultravioletb uvb radiation from the sun. The ozone layer is responsible for absorbing harmful ultraviolet rays, and preventing them from entering the earths atmosphere. Sometimes this means creating an image that looks much like an aerial photo of the. In contrast, groundlevel ozone is an air pollutant, which has harmful respiratory and cardiovascular effects. But the one and the most important reason for ozone layer depletion is the. Ozone layer depletion cause, effects, and solutions. The feature of very low ozone concentrations over a very welldefined region.
Ozone layer definition and meaning collins english. The ozone layer protects living things from the harmful radiation of the sun. Ozone layer damage is more like a really thin patch than a hole. The ozone layer is found in the lower portion of the earths atmosphere.
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