The main cause of 0 3 layer depletion is the presence of chlorine containing gases primarily cfc s and related hydrocarbons due to the presence of uv light, these gases dissociate and release chlorine atom, which then leads to o 3 destruction. It allows only the required doses of the suns solar energy to reach the earths surface. Mar 12, 2019 ozone layer depletion is the destruction of ozone gas of upper atmospheric layer stratosphere, caused by substances formed from breakdown of. Ozone layer is a thin blanketlike layer that spreads over the atmosphere of the earth. However, these cause a very nominal contribution to the ozone layer depletion which is near about 1 to 2 percent and therefore these. This proves ozone depletion is a big issue that needs attention. Ozone layer depletion causes and effects of ozone layer.
While several substances were addressed, chcs and hcfcs were the main ones that the international. Ozone layer and causes, effects and solutions to ozone depletion. Pdf this study was conducted at university of gujrat during 20142015 as a term paper for master of philosophy. 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. The ozone layer protects the surface of the earth and its phenomena from stray rays from the sun. Ozone layer depletion leads to decrease in ozone in the stratosphere and increase in ozone present in the lower atmosphere. Apr 18, 2019 the ozone layer helps to protect life from harmful ultraviolet radiation. The ozone layer is made up of ozone molecules, like ozzy ozone, and forms a thin shield high up in the sky. Let us have a detailed look at the various causes and effects of ozone layer depletion. Causes, effects and solutions of ozone layer depletion. Environmental effects of ozone depletion montreal protocol.
The ozone layer thus plays an important role by preventing the harmful uv radiations from penetrating into the earths lower atmosphere the troposphere. Ozone layer depletion cause, effects, and solutions. The ozone layer was discovered in 19 by the french physicists charles fabry and henri buisson. What are the causes and effects of ozone depletion. The evaporation of surface water through the stomata of leaves increases, which results in the decreased moisture content of the soil. Hence, cfcs are transporting agents that are responsible for damaging the ozone layer. The ozone layer was discovered in 19 by the french physicists. Sep 30, 2019 the ozone layer has historically protected the earth from the harmful uv rays, although in recent decades this protection has diminished due to stratospheric ozone depletion. Sep 20, 2016 ozone depletion ozone layer depletion, is simply the wearing out reduction of the amount of ozone in the stratosphere. Ppt ozone layer depletion powerpoint presentation free to. 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. It protects life on earth from the suns ultraviolet uv rays.
The montreal protocol is an international agreement to address the causes of ozone depletion. The latest satellite measurement indicates an ozone loss at the rate of 8% just above the south pole, at the centre of the ozone hole, 5% of the protective gas is depleting each day. Ozone depletion consists of two related events observed since the late 1970s. Solution on ozone layer depletion september 16 was voted the world ozone day in the year 1994 by the united nations general assembly. Global warming is caused by the greenhouse effect, which is essential to life as we know it on planet earth. Good up high, bad nearby pdf, 2 pp, 91 kb ozone acts as a protective layer high above the earth, but it can be harmful to breathe. Depletion of ozone layer essaytyper the depletion of the ozone layer. Polar vortex in the previous posts, we have studied about tropical cyclones and extra tropical cyclones temperate cyclone. Causes of ozone depletion ozone depletion occurs when the natural balance between the production and destruction of stratospheric ozone is tipped in favour of destruction. Find out what caused the ozone hole, and how the 1989 montreal. The ozone layer has historically protected the earth from the harmful uv rays, although in recent decades this protection has diminished due to stratospheric ozone depletion.
Nearly 90% of earths ozone is in the stratosphere and referred to as the ozone layer. The main effect of ozone depletion is an increase in uvb rays reaching the earths surface. It is present in traces less than 1 ppm in the atmosphere. Unlike oxygen o2, ozone has a strong scent and is blue in color. Reducing the use of ozone depletion substances ods. This is an image that shows ozone depletion because of the 3 rays that are poking through the layer, which represents the hole in the ozone layer. Additional copies may be obtained, free of charge, from. Causes and effects of ozone layer depletion that are truly dangerous.
Warming of the atmosphere is also expected to cause changes in. The causes, mechanism and bio effects of ozone layer depletion on humans were addressed. Find out what caused the ozone hole, and how the 1989 montreal protocol sought to put an end to ozone depletion. The chlorofluorocarbon and the halons are potent ozone depletors. Presence of ozone in the lower atmosphere is considered as a pollutant and a greenhouse gas. Ozone layer importance, depletion, effects and protection. Causes of ozone layer depletion and its effects on human. Ppt ozone layer depletion powerpoint presentation free. The main things that lead to destruction of the ozone gas in the ozone layer. 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.
Presentation on ozone depletion linkedin slideshare. There are many situations where human activities have. Pdf causes of ozone layer depletion and its effects on. Generally, we find thinning or depletion of the ozone layer to the extent of ozone hole creation over the southern pole i. Experts blame ozone layer depletion on manmade chem. The thinning is most pronounced in the polar regions, especially over antarctica. The chlorine and bromine free radicals react with ozone molecule and destroy their molecular structure, thus depleting the ozone layer.
One chlorine molecule from a cfc can destroy up to 100,000 ozone molecules. 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. Jan 07, 2016 polar vortex in the previous posts, we have studied about tropical cyclones and extra tropical cyclones temperate cyclone. Ultraviolet rays can also have bad effects on nature. Ozone layer depletion essay sample free college essay. Ozone depletion free math worksheets for kids kiddy math. Causes and effects of ozone layer depletion that are. However, various factors have led to the depletion and damage of this protective layer. What are the causes and effects of ozone depletion, and. A free powerpoint ppt presentation displayed as a flash slide show on id. But the one and the most important reason for ozone layer depletion is the. Ozone is a molecule consisting of three oxygen atoms o3 and has the property of being highly toxic because of its radioactivity. Learn more about the process, causes, and effects of ozone layer 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.
May 03, 2017 ozone layer is a thin blanketlike layer that spreads over the atmosphere of the earth. The ozone layer is responsible for absorbing harmful ultraviolet rays, and preventing them from entering the earths atmosphere. These chemicals are found in cleaning agents, aerosols, insulating foam, and refrigerants. 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. Ozone layer depletion ozone layer depletion is the gradual thinning of the earths ozone layer in the upper atmosphere caused due tho release of chemical compounds containing gaseous bromine or chlorine from industries or other human activities. Effects of ozone depletion ozone depletion, ozone layer. The ozone layer helps to protect life from harmful ultraviolet radiation. This layer absorbs about 99% harmful solar radiations like uv rays, x rays, gamma rays etc. Ozone is a paleblue gas that forms a layer in the stratosphere of our atmosphere called ozone layer.
Its effect, however, has been global, and is considered one. Learn what cfcs are, how they have contributed to the ozone hole, and how the 1989 montreal. Ozone layer depletion article about ozone layer depletion. Ozone layer protection european commission europa eu. It contains high concentrations of ozone o3 relative to other parts of the atmosphere. Far above earths surface, the ozone layer helps to protect life from harmful ultraviolet radiation. Ozone in the lower atmosphere contributes to global warming and climate change.
Although natural phenomena can cause temporary ozone loss, chlorine and bromine released from manmade compounds such as cfcs are now accepted as the main cause of this. One of the main reasons for the widespread concern about depletion of the ozone layer is the anticipated increase in. Ozone depletion is allowing the uv radiation to earth surface. 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. Why the hole in the atmospheric ozone layer above us. Ozone layer depletion is the destruction of ozone gas of upper atmospheric layer stratosphere, caused by substances formed from breakdown of. It is found that the ozone layer gets affected by some natural causes that are sunspots and stratospheric winds.
Ozone layer depletion is one of the major environmental issues which is getting thinner day by day as a result of increasing pollution. Ozone layer depletion synonyms, ozone layer depletion pronunciation, ozone layer depletion translation, english dictionary definition of ozone layer depletion. Ozone layer importance, depletion, effects and protection of. Ozone layer depletion definition, causes, solutions toppr. Ozone depletion publications, references and resources. The ozone layer refers to a region of earths stratosphere that absorbs most of the suns uv radiation. Man has tried hard to deploy protective measures towards controlling the ozone layer from depletion,but this is so. Ozone layer depletion, its causes, effects and control. May 23, 2019 ozone is a paleblue gas that forms a layer in the stratosphere of our atmosphere called ozone layer. Scribd is the worlds largest social reading and publishing site. The latter phenomenon is referred to as the ozone hole. Choose from 500 different sets of ozone depletion effects flashcards on quizlet. The chlorine ion catalyzing o 3 depletion can take place in the gaseous phase, but it is dramatically. It will magnify the effects of ultraviolet rays on human health.
Ozone depletion and climate change environment canada. Ozone layer and causes, effects and solutions to ozone. 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. Ozone depletion is primarily caused by human activities. Ozone depletion facts and information national geographic.
Ozone layer depletion causes, effects and solutions 7. Ozone layer depletion, its causes and its effects ozone. They can kill plankton, which is a major source of food in the oceans food chain. The severe depletion of the ozone layer in any particular area is called ozone hole. It is an essential factor for many global, biological and environmental phenomena. Effects of ozone depletion ozone depletion, ozone layer, ozone. Global warming and ozone layer depletion are two different problems see the sidebar misconceptions about global atmospheric change on page 95.
Ozone depletion is largely a result of manmade substances. Ozone layer the ozone layer is basically naturally occurring gas in the region of stratosphere where ozone particles are accumulated 2. Unlike pollution, which has many types and causes, ozone depletion has been pinned down to one major human activity. 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. Unfortunately, this gives them plenty of time to find their way to the ozone layer. The main effect of ozone depletion is an increase in uvb rays reaching the earths surface causes. Ozone layer depletion, its causes and its effects free download as powerpoint presentation. Jan 20, 2010 the montreal protocol is an international agreement to address the causes of ozone depletion. Concentrations of ozone depleting substances are expected to decline over the coming century, bringing a gradual. Researchers indicate that many of the effects of ozone depletion on human health tend to apply for animals, too.
In the 1980s, scientists began finding clues that the ozone layer was being depleted. Do ozone depleting gases and their substitutes have an effect on climate. Hence, we should be aware and actions must be taken to ensure that ozone layer is not destroyed. It is revealed that introduction of chloroflourocarbons cfcs in the environment is the most rated cause of said depiction. Learn ozone depletion effects with free interactive flashcards. Man has tried hard to deploy protective measures towards controlling the ozone layer. Ozone layer depletion, its causes, effects and control measures.
The proteins cells in plants undergo harmful mutations, all due to ultraviolet radiations. Pdf causes of ozone layer depletion and its effects on human. The depletion of the ozone describes two closely related but distinct phenomena which have been repeatedly observed since the latter 1970s. Protection against depletion of stratospheric ozone by chlorofluorocarbons. The causes, mechanism and bioeffects of ozone layer depletion on humans were addressed. Questions and answers about the environmental effects of the ozone layer depletion and. This, in turn, will lead to the breakdown of ozone. There have been several concerns about ozone depletion. Here we will study polar vortex circumpolar vortex which is a polar cyclone. The origins of uncertainty about the factors that affect the ozone layer are, as seen, very diverse. The problems and causes associated with ozone depletion arise from human activities. What is an ozone hole and causes and effects of ozone. Learn more about the process, causes, and effects of.
Humans rely heavily on the absorption of ultraviolet b rays by the ozone layer because uvb radiation causes skin cancer and can lead to genetic damage. The level from which it extends outward varies with latitude. Ozone depletion was determined to be occuring primarily over the antarctic region, the south pole. The first report of depletion in o 3 layer came out in the 1980s by an atmospheric scientist in antarctica. Ozone layer depletion essay sample free college essay examples.
Ozone absorbs a band of ultraviolet radiation called uvb. This publication provides basic information about groundlevel and highaltitude ozone. The thinning or reduction of ozone depletion is most prominent in the polar regions, especially over antarctica. A region of the atmosphere lying mostly in the stratosphere, between about 15 and 30 kilometers in altitude, containing a relatively high concentration.
596 1424 1303 1226 1339 1572 1442 118 211 825 644 1557 836 1575 1038 587 1440 1453 591 561 1476 1535 739 693 1192 1052 748 1393 623 827 1193 1417 682 494 298 556 193 921 769 595 429