There are many situations where human activities have. The chlorofluorocarbon and the halons are potent ozone. A free powerpoint ppt presentation displayed as a flash slide show on id. The ozone layer was discovered in 19 by the french physicists charles fabry and henri buisson. It has been found that the layer of ozone layer is thinning due to the excessive use of green house gases like carbon monoxide, nitric acid, chloro fluoro carbon etc. Mar 16, 2010 ozone depletion reasons, impacts, prevention by reshma. Conversion project approved by the 41st executive committee in december. Procedure stratospheric ozone that protects the earth against harmful ultraviolet radiation is being depleted by the anthropogenic introduction of various gases into the atmosphere. One chlorine molecule has a capacity to breakdown thousands of molecules present in the ozone layer, therefore, it results in the depletion of the ozone layer. Abstract about the ozone layer ozone is a dangerous but vital gas for our basic survival.
Ozone layer research and technical resources ozone layer. Our powerpoint presentation about ozone depletion, its effects and its causes. The causes, mechanism and bioeffects of ozone layer depletion on humans were addressed. The ozone depletion observed over the past decades has probably led to a 510 % increase in harmful uvradiation in large parts of europe. Find out what caused the ozone hole, and how the 1989 montreal protocol sought to put an end to ozone depletion. A polar vortex is a large pocket of very cold air, typically the coldest air in the northern hemisphere, which sits over the polar region during the winter season. These days its easy to check on the local uv index, which tells you. Polar vortex in the previous posts, we have studied about tropical cyclones and extra tropical cyclones temperate cyclone.
Significant depletion of the arctic ozone layer also occurs in. View the latest status of the ozone layer over the antarctic, with a focus on the ozone hole. It is also one of the prime reasons which are leading to global warming. Ozone depletion free download as powerpoint presentation. The increase of ultraviolet light due to depletion of the ozone layer will not only. The ozone depletion phenomenon the national academies press. Downloads scientific assessment of ozone depletion 2018. Ozone is a colourless gas which is found in the stratosphere of our upper atmosphere. In the layer surrounding the earths surface, the troposphere, ground level or bad ozone is an air pollutant that is a key ingredient to. High uv levels can cause skin cancer, cataracts, as well as affecting the growth of plants. The depletion has lessened since then and now is about 3% averaged over the globe. Aug 16, 2018 obviously, both ozone depletion and climate change are problems with global extent that emerge from diverse and numerous activities. Experts blame ozonelayer depletion on manmade chemicals containing chlorine and bromine that are emitted from a.
The evolution of ozone layer depletion, its impact on climate. Ppt ozone layer depletion authorstream presentation. We solved that problem with the montreal protocol on substances that deplete the ozone layer stopping the increase in global temperatures by 1998. Electromagnetic energy coming from the sun is absorbed by the earth, which. Hence, cfcs are transporting agents that are responsible for damaging the ozone layer. Ozone absorbs a band of ultraviolet radiation called uvb. It contains some videos and gif at thte end from an external source. Like an infection that grows more and more virulent, the continentsize hole in earths ozone layer keeps ge. An increase or decrease of the gate voltage with respect to the source causes the depletion region to expand or shrink.
They are capable of breaking down the molecules of the ozone layer. Find highquality ozone depletion stock photos and editorial news pictures from getty images. Ozone layer depletion is one of the most serious problems faced by our planet earth. Depletion of the global ozone layer increased gradually in the 1980s and reached a maximum of about 5% in the early 1990s.
This, in turn, will lead to the breakdown of ozone. There is a corresponding hole over the arctic that similarly appears in the spring, although in some years warmer winters there do not result in a major depletion of the ozone layer. In this entry we present the data on ozone layer depletion, signs of recovery, emissions of ozonedepleting substances, international agreement and. This helps you give your presentation on depletion of ozone layer in a conference, a school lecture, a business proposal, in a webinar and business and professional representations. Ozone layer is recovering latest burning issues free.
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. A hole in the ozone layer has developed over antarctica. The danger and prevention of ozone layer depletion. Thus, for a depletion nmos transistor, the channel conducts even if v gs0. Ozone depletion cycles objective the objective of the exercise is to calculate the thermodynamic feasibility of several possible ozone depletion cycles. Data collected in the upper atmosphere have shown that there has been a general thinning of the ozone layer over most of the globe. No design or tech skills are necessary its free, easy, and awesome. Ozone depletion potential an overview sciencedirect topics. That is, its made from a combination of sea water and air oxygen, but yet is a distinct substance that yo.
The increase in the levels of uv rays lead to high rate of skin cancer and eye related problems. Ozone depleting substances are the substances such as chlorofluorocarbons, halons, carbon tetrachloride, hydrofluorocarbons, etc. The ozone layer absorbs much of the incoming solar ultraviolet radiation uvr and thus offers substan tial protection from this radiation to all organisms living at. Thats a good thing because uvc would be very harmful to our ecosystems. In your ozone layer term paper, consider how greenhouse gases contribute to the deletion of the ozone layer and promulgate global warming. Ozone layer and its depletion animation mcgrawhill animations. Apr 14, 2009 we use your linkedin profile and activity data to personalize ads and to show you more relevant ads. Ozone depletion and global warming linkedin slideshare. The depletion mosfet the physical construction of a depletion mosfet is identical to the enhancement mosfet, with one exception.
It is an essential factor for many global, biological and environmental phenomena. Recently, t he depletion of its layer has been hazardous to the safety for our environment and its. Ozone depletion displaying top 8 worksheets found for this concept some of the worksheets for this concept are activity pack for key stages 2 3, tthe ozone hole and global he ozone hole and global global, national aeronautics and the ozone hole space administratio n, the good the bad and the ugly of ozone, causes of ozone layer depletion and its effects on human, ozone. 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 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. Update on ozonedepleting substances odss and other gases of.
Abstract about the ozone layer the disappearance of the. Ppt ozone depletion powerpoint presentation free to. Presentation on ozone depletion linkedin slideshare. Stratospheric ozone depletion, ultraviolet radiation and. The layer of ozone gas is what which protects us from the harmful ultraviolet radiations of the sun. The ozone layer exists mainly in the stratosphere, a layer of the atmosphere that reaches from 10 to 50 kilometers about 6 to 30 miles above the earths. Ozone layer depletion definition, causes, solutions toppr. Following is the list of some of the main ozone depleting substances and the sources from where they are released. Here we will study polar vortex circumpolar vortex which is a polar cyclone. Less dramatic, but still significant, depletion of ozone levels has been recorded around the globe. In above, we will discuss first cause of ozone depletion the second cause of ozone depletion is below. The ozone layer has been identified in term papers as important in the overall spectrum of the atmosphere. Natural causes of ozone depletion ozone depletion describes two distinct, but related observations.
Ozone layer depletion ozone layer depletion the effect on the world the effect of ozone layer depletion often seems as if it is a far away problem, given that the actual holes in this protective blanket over the earths atmosphere are concentrated around the poles and far from most human settlements. Ozone o3 is a stratospheric layer that plays important role in providing support to humans for their survival. At the pn junction the border of the two types, the mobile electrons in the ntype this is due to the excess electron provided by the ndopan. A global thinning of the ozone layer results as ozone rich air from the remaining ozone layer flows into the ozone poor. Cfcs, hcfcs, halons, methyl bromide, carbon tetrachloride, and methyl chloroform. Ozone is formed by photochemical reaction, followed by three body reaction. The ozone depletion observed over the past decades has probably led to a 510% increase in harmful uvradiation in large parts of europe. 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. What is the issue with the hole in the ozone layer. Solomon and albritton, 1992 as a measure of the effectiveness of a given compound in removing ozone, relative to a standard compound, which is taken to be cfc11. Ppt ozone depletion powerpoint presentation free to download id. Ozone layer depletion causes, effects and solutions 7.
The uv intensity on the surface of the earth fluctuates from day to day and depends on where you live. Nearly 500 organizations, teams, and individuals from 40 countries have received stratospheric ozone protection awards for their exceptional leadership, personal dedication, and technical achievements. About depletion of the ozone layer is the anticipated increase in the amounts of. The antarctic hole now measures about 9 million square miles, nearly the size of north america. Click download or read online button to get acid rain and ozone layer depletion book now. Causes of ozone layer depletion and its effects on human. Without ozone, there would be global warming, in addition diseases can come up. Ozone depletion facts and information national geographic.
It is present in traces less than 1 ppm in the atmosphere. Click download or read online button to get ozone depletion greenhouse gases and climate change book now. Industries that manufacture things like insulating foams, solvents, soaps, cooling things like air conditioners. Ozone layer the ozone layer is basically naturally occurring gas in the region of stratosphere where ozone particles are accumulated 2. Dear students, the team of jagran josh is presenting you a set of 10 questions based on ozone layer depletion. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Ozone layer depletion is simply the wearing out reduction of the amount of ozone in the stratosphere. Uncovering the hidden hazard of hairspray a usual morning routine might include a spritz of hairspray, a spurt of shaving cream, or a spray of deodor. It acts as a filter for ultraviolet uv radiation from the sun.
Nasa provides daily images, data, and information from satellite instruments that monitor the ozone layer and the ozone hole ozone holea thinning break in the stratospheric ozone layer. Apr 22, 2008 the ozone depletion has not created a hole, if it did there would be catastrophic damage to all living things below it, a myth. Download premium images you cant get anywhere else. The third body m absorbs the excess energy liberated by the above reaction and there by stabilise the o 3 ozone molecule. The best analogy i know of for ozone in the atmosphere is that it is very much like the foam on the ocean surf as it crashes on the beach. Ozone layer depletion is one of the major environmental issues which is getting thinner day by day as a. Ozone depletion consists of two related events observed since the late 1970s. A close look at the evolution at the life on earth reveals that initially the. The sun propagates ultraviolet radiations which as an adverse effect on living beings. The ozone layer prevents all uvc from reaching the earths surface. Click any map image to bring up a new page with a highresolution image. This layer does not allow the uv rays to reach the earth surface.
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. As a result the total amount of ozone remains constant. Ozone depletion greenhouse gases and climate change. Ppt ozone layer depletion powerpoint presentation free. The montreal protocol on substances that deplete the. Protecting the ozone layer and reducing global warming undp. Calculation of depletion layer thickness by including the mobile carriers saeed mohammadi and c.
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 harmful at ground level but high up the atmosphere ozone layer plays a vital role in the protection of all living beings. What are the disadvantages of having an ozone layer. The connection between ozone layer depletion and uvb radiation. If the value of v gs is positive, the channel is further enhanced. Ozone layer ozone layer research papers discuss the depletion of the the ozone layer in the atmosphere. Ozone layer depletion powerpoint template sketchbubble. The ozone layer is a thin protective layer of gas 10 km50km above the earth, in the upper stratosphere. Causes, effects and solutions of ozone layer depletion. The ozone layer refers to a region of earths stratosphere that absorbs most of the suns uv radiation. Acid rain and ozone layer depletion download ebook pdf. The thinning is most pronounced in the polar regions, especially over antarctica. Ozone depletion chapter 2 ozone depletion chapter 2 ozone layer a layer in the stratosphere that is made of ozone o3 absorbs ultraviolet light from the sun.
Easy to download and edit, the ozone layer depletion powerpoint template has hd graphics. Stratospheric ozone protection awards since 1990, epa has recognized outstanding achievement in ozone layer protection. Why the hole in the atmospheric ozone layer above us. Ozone layer depletion cause, effects, and solutions. The ozone loss is very small near the equator and increases with latitude toward the poles. How large is the depletion of the global ozone layer. The adobe flash plugin is needed to view this content.
Designation of amount of such depletion as an ozone hole is made when the detected amount of depletion. Nearly 90% of earths ozone is in the stratosphere and referred to as the ozone layer. The ozone layer is mainly found in the lower portion of the stratosphere. Lets have a look at some of the solutions to ozone layer depletion.
Depletion to ozone layer depletion does not affect a region or a country. The conduction channel is physically implanted rather than induced. Calculation of depletion layer thickness by including the. Its layer in the stratosphere protects us from deadly ultraviolet rays. A depletion region is a natural feature of doping a semiconductor ntype and right next to it ptype. The concept of ozone depletion potential odp is widely used wuebbles et al. The first report of depletion in o 3 layer came out in the 1980s by an atmospheric scientist in antarctica. In fact whole world is vulnerable to its after affects.
Selvakumar abstracta useful analytical approximation for depletion layer thick ness, which takes into account the effect of mobile carriers under high forward bias is presented. Relatively high means a few parts per million much higher than the. 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 ozone depleting substances ods. This is apparently found in the lowest region of the stratosphere.
Solving climate change, especially, will likely require participation at multiple levels international, regional, transnational, national, and local and perhaps it will require profound changes in economic. Ozone is a naturally occurring gas that is found in two layers of the atmosphere. Project report on ozone depletion environmental pollution. In second cause, tv and fm radio waves is involve which effect on f and e layer of ionosphere and then ozone deplete.
The montreal protocol on substances that deplete the ozone layer. Chlorofluorocarbons or the cfc are the main cause of ozone layer depletion. Global warming and ozone layer depletion are two different problems see the sidebar misconceptions about global atmospheric change on page 95. 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 which contains relatively high concentrations of ozone o3. It is very essential as it prevents nearly 99% o f the uv. Ozonedepletion greenhousegasesandclimatechange download ozonedepletion greenhousegasesandclimatechange ebook pdf or read online books in pdf, epub. It protects us from harmful uv rays that can have serious effects on animals, biodiversity and peoples health, including skin cancer and eye cataract.
Role of radicals in ozone formation and depletion in the stratosphere. Ozone depletion ozone depletion chlorofluorocarbon free. Satellite instruments monitor the ozone layer, and we use their data to create the images that depict the amount of ozone. Network layer and ip protocol cse 32, winter 2010 instructor. Unlike pollution, which has many types and causes, ozone depletion has been pinned down to one major human activity. 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 depletion stock pictures, royaltyfree photos. List of books and articles about ozone layer online. Apr 18, 2019 the ozone layer helps to protect life from harmful ultraviolet radiation. This site is like a library, use search box in the widget to get. As the area of polar ozone depletion commonly called the ozone hole gets larger, additional ultraviolet rays are allowed to pass through. Pdf causes of ozone layer depletion and its effects on. A layer of ozone envelops the earth and keeps damaging ultraviolet, or uv, radiation from reaching living things on the planets surface. The average depletion exceeds the natural variability of the ozone layer. Newly detected ozonedepleting substances in the atmosphere pdf. It contains high concentrations of ozone o3 relative to other parts of the atmosphere.
This layer absorbs the radiations and prohibits them from entering the outer surface of the earth. Unlike oxygen o2, ozone has a strong scent and is blue in color. The ozone layer depletion is a major concern and is associated with a number of factors. In humans, a depleted ozone layer would likely mean higher rates of skin cancer, cataracts, and immune system problems. These rays cause cancer, cataracts, and lowered immunity to diseases. The ozone layer has been depleted gradually since 1980 and now is about an average of 4% lower over the globe. A g overnment engineering college t hrissur slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Depletion of stratospheric ozone o3, as commonly known as the hole in the ozone layer, is an issue of international concern. Global warming is caused by the greenhouse effect, which is essential to life as we know it on planet earth. The main causes responsible for the depletion of the ozone layer are listed below. Powerpoint is the worlds most popular presentation software which can let you create professional depletion of ozone layer powerpoint presentation easily and in no time. Ozone layer research papers on the depletion of the the ozone. 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.