The term ozone hole refers to the depletion of the protective ozone layer in the upper atmosphere stratosphere over earths polar regions. To the point where a seasonal hole in the ozone layer began to appear above the antarctic. Man has tried hard to deploy protective measures towards controlling the ozone layer from depletion,but this is so. But, steps should be taken at the individual level as well to prevent the depletion of ozone layer. People ask if we cannot produce our own ozone gas to replenish what is lost in the stratosphere. The causes of ozone depletion the impacts ozone depletion has on the environment the current status of the ozone solutions to the. Ozone layer depletion is simply the wearing out reduction of the amount of ozone in the stratosphere.
The ozone layer is mainly found in the lower portion of the stratosphere. It will measure the molecules in the atmosphere above brazil that influence the formation of the hole in the ozone layer. Ozone layer depletion and its control measures zilwach. The causes, mechanism and bioeffects of ozone layer depletion on humans were addressed. Causes of ozone depletion there are two different types of ozone depletion, both are very similar. When it is in our atmosphere, however, it helps to shield us from the dangerous radiation that the suns rays produce. In semiconductor physics, the depletion region, also called depletion layer, depletion zone, junction region, space charge region or space charge layer, is an insulating region within a conductive, doped semiconductor material where the mobile charge carriers have been diffused away, or have been forced away by an electric field. Experts blame ozonelayer depletion on manmade chem icals containing chlorine and. Ozone layer protection environmental protection department.
Ozone layer depletion chlorofluorocarbon ozone depletion. But ozone it self, when comes too close to earth can have delirious effect on both living and non living as it is a powerful oxidant. Since about the 1970s, there has been a decrease in total volume of the ozone in the ozone layer, of about 4%, per decade. It is an essential factor for many global, biological and environmental phenomena. Introduction the ozone layer is a layer in earths atmosphere which contains relatively high concentrations of ozone o3. The thinning is most pronounced in the polar regions, especially over antarctica. But many researchers do not agree with these predictions,14 and express their.
Introduction ozone is a bluish gas located in the stratosphere which protects the earth by absorbing uvb and prevents this harmful radiation from reaching the earth. Industries that manufacture things like insulating foams, solvents, soaps, cooling things like air conditioners. The increase in the levels of uv rays lead to high rate of skin cancer and eye related problems. What we all need to understand is the idea that we all are going to have to face the repercussions of ozone layer depletion. Ozone is a gas that is present in the ozone layer in the stratosphere of the earth. This means if we can do something to balance the natural production with its depletion, there should not be a problem. Ozone layer is a thin blanketlike layer that spreads over the atmosphere of the earth. It contains high concentrations of ozone o3 relative to other parts of the atmosphere. Index terms bio effects, chlorofluorocarbon, ozone layer depletion, protection. 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. Title vi for stratospheric ozone protection, signed into law.
One measure against ozone layer depletion would be the reduction of private car use. High up in our atmosphere, it performs a vital role in protecting humans and living things on earth from harmful uvb and uvc rays from the sun. The ozone layer is a protective shield that blocks the suns harmful ultraviolet rays. 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 harmful not just to the environment, but to all living things from animals to humans. Lets have a look at some of the solutions to ozone layer depletion.
Depletion of stratospheric ozone o3, as commonly known as the hole in the ozone layer, is an issue of international concern. Avoid using pesticides and prevent ozone depletion. Thus, ozone layer depletion has become a major concern among the environmentalists. About 90% of the planets ozone is in the ozone layer. Global warming is caused by the greenhouse effect, which is essential to life as we know it on planet earth. The earths ozone layer is mainly found in the lower portion of the stratosphere from approximately 20 to 30.
By knowing the statistics about ozone layer depletion, we can keep working hard at restoring our planet so that it is available for future generations to enjoy. Pdf causes of ozone layer depletion and its effects on. The richness of the ozone layer that makes the hole so significant and the science behind the hole is far less popular. Ozone depletion is allowing the uv radiation to earth surface. There are also springtime polar tropospheric ozone depletion. Fire extinguishers contain halons and methyl bromide in the form of pesticides can also be also a cause for the depletion.
Ozone depletion, gradual thinning of earths ozone layer caused by the release of chemical compounds containing gaseous chlorine or. The best solution for this would be to try using natural remedies, rather than heading out for pesticides. You can perhaps try to weed manually or mow your garden consistently so as to avoid. It is revealed that introduction of chloroflourocarbons cfcs in the environment is the most rated cause of said depiction. Ozone layer depletion cause, effects, and solutions. The ozone layer and its depletion linkedin slideshare. Ozone o3 is a stratospheric layer that plays important role in providing support to humans for their survival. 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. This layer absorbs 9399% of the suns high frequency ultraviolet light, which is potentially damaging to life on earth 1. How to prevent ozone depletion and what would happen if. Ozone layer depletion is one of the most serious problems faced by our planet earth. Scientists discovered in the mid1970s that certain manmade chemicals could destroy ozone.
The latter phenomenon is referred to as the ozone hole. It allows only the required doses of the suns solar energy to reach the earths surface. Since cars emit greenhouse gases which also turn into smog, cars vastly contribute to the ozone layer depletion issue since smog acts as a kind of catalyst in the ozone depletion process. Layers of the atmosphere 45the suns utraviolet rays 68the ozone layer 9 3 4. Causes, effects and solutions of ozone layer depletion. 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 ozone is a simple molecule of three oxygen atoms and it is present in the two lowest layers of the atmosphere troposphere and stratosphere. The same report goes on to say because of changes in other influencing factors, such as changes in cloud cover, aerosols, or snowice cover, uv. These solutions to ozone depletion can help to reinforce this shield so that it stays in place for future generations. Approximately 90 percent of the atmospheres ozone occurs from 1018 km 611 miles to. Frequently asked questions about the ozone layer us epa. The ozone hole and global warming union of concerned scientists. Ozone layer protection european commission europa eu.
The ozone layer was discovered in 19 by the french physicists charles fabry and henri buisson. There are natural processes that create and destroy ozone in the stratosphere. Solutions to ozone layer depletion the depletion of ozone layer is a serious issue and various programmes had been launched by the government of various countries to prevent it. There, it will absorb almost all ultraviolet light which is harmful to many organisms. Ozone layer the ozone layer is basically naturally occurring gas in the region of stratosphere where ozone particles are accumulated 2. When highenergy ultraviolet rays uvc strike an oxygen. The ozone layer lies approximately 1540 kilometers 1025 miles above the earths surface, in the stratosphere.
The layer of the earths atmosphere that surrounds us is called the troposphere. Protecting the ozone layer and reducing global warming undp. Most ozone is found in the stratosphere upper part of the atmosphere, more than 10 to 16 kms from the surface of the earth. Following is the list of some of the main ozone depleting substances and the sources from where they are released. There are many situations where human activities have. Almost always the ozone has only been correlated with the hole in the ozone layer and the damages it has caused to the environment. View ozone layer depletion research papers on academia. Research has shown that the ozone is slowly being depleted.
It is thickestnear the surface and thins out with height until iteventually merges with space. Unlike pollution, which has many types and causes, ozone depletion has been pinned down to one major human activity. The ozone layer is a belt of naturally occurring ozone gas that sits 9. Ozone is a colourless gas which is found in the stratosphere of our upper atmosphere. 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 is a natural gas and is naturally replenished over time. Scientists have reached consensus that ozone depletion in the stratosphere is caused by ozone depleting chemicals. The ozone layer protects the surface of the earth and its phenomena from stray rays from the sun. The stratosphere, the next higher layer, extends about 10. It is also one of the prime reasons which are leading to global warming. Within the stratosphere, the ozone layer is the portion that contains the highest.
Ozone depletion consists of two related events observed since the late 1970s. Pesticides may be an easy solution for getting rid of weed, but are harmful for the ozone layer. Project ozone layer depletion pdf the stratospheric ozone layer forms a thin shield in the upper atmosphere, protecting life on earth from. What is important to keep in mind is the fact that prevention of ozone layer depletion is so very important because it directly affects the well being of the people. In fact whole world is vulnerable to its after affects. Layers of the atmospherethe atmosphere is divided into five layers. Depletion of this layer by ozone depleting substances ods will lead to higher uvb levels, which in turn will cause increased skin cancers and cataracts and potential damage to some marine organisms, plants, and plastics. The ozone layer vital for life the ozone layer is a layer of gas about 15 km above the earths surface.
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. Depletion to ozone layer depletion does not affect a region or a country. As a result the total amount of ozone remains constant. Dramatically every spring you may have heard this called the ozone hole. Case study on ozone layer free download as powerpoint presentation. 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.
Ozone is a colorless gas that can be a lung irritant when it is present at groundlevel. The natural distribution of ozone around the earth is. 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. The ozone layer is a concentration of ozone molecules in the stratosphere. The term ozone depletion can refer to a number of distinct, but related phenomena. Global warming and ozone layer depletion are two different problems see the sidebar misconceptions about global atmospheric change on page 95. The ozone layer refers to a region of earths stratosphere that absorbs most of the suns uv radiation. Ozone layer depletion causes, effects and solutions 7. Ozone layer is also naturally broken down but there is a balance between its formation and natural depletion. Ozone depletion simple english wikipedia, the free. Scribd is the worlds largest social reading and publishing site.
Once our awareness was heightened about the humancreated pollutants that cause the depletion of the earths protective ozone layer. The latest ozone layer depletion news is included at the foot of the page. Ozone depleting substances are the substances such as chlorofluorocarbons, halons, carbon tetrachloride, hydrofluorocarbons, etc. The first one has been a slow, but steady ozone depletion of 4% per decade of the earths. It is present in traces less than 1 ppm in the atmosphere.