The ozone layer in the stratosphere occurs naturally, and it encircles the planet. The effects of ozone depletion the impacts of ozone depletion all living cells, whether in microbes, plants or animals, contain a complex molecule called dna which carries the genetic code. The ozone layer acts as a natural filter, absorbing most of the suns burning ultraviolet uv rays. Find out what caused the ozone hole, and how the 1989 montreal protocol sought to put an end to ozone depletion. Calculations of eesc combine the amounts of chlorine and bro. This quick video discusses the role of the ozone layer and how cfcs can cause ozone depletion. Environmental effects of ozone depletion, uv radiation and interactions. Project ozone layer depletion pdf the stratospheric ozone layer forms a thin shield in the upper atmosphere, protecting life on earth from. The ozone layer lies approximately 1540 kilometers 1025 miles above the earths surface, in the stratosphere. The ozone layer helps to protect life from harmful ultraviolet radiation. The ozone hole is shown in purple above the antarctic on sept. The ozone depletion resulted in secondary production of an ozone layer near the ground terrestrial ozone layer, which is responsible for adverse effects on plants, humans and environment with increased number of.
Pdf ozone o 3 is a stratospheric layer that plays important role in providing. These climate factors are expected to combine in regionalspecific ways to. If interested, you can purchase this powerpoint from my online store. Other promising approaches combine, as above, satellite data with ra. Nearly 90% of earths ozone is in the stratosphere and referred to as the ozone layer. Ozone o 3 is a stratospheric layer that plays important role in providing support to humans for their survival. When volcanoes erupt, they produce massive clouds of ashes into the troposphere, and then they drift upward into the stratosphere the upper atmosphere layer where ozone gas protects humans from uv radiation. This is the set of instructions which describes the structure and chemistry of an organism. It is revealed that introduction of chloroflourocarbons cfcs in the environment is the most rated cause. The ozone layer was discovered in 19 by the french physicists charles fabry and henri buisson. The causes, mechanism and bioeffects of ozone layer depletion on humans were addressed. What are the causes and effects of ozone depletion. Rivm report 481505011 technical report on stratospheric ozone. Ozone depletion is allowing the uv radiation to earth surface.
Near the ground, ozone forming as a result of chemical reactions involving traffic pollution and sunlight may cause a number of respiratory problems, particularly for young children. Ozone layer depletion, its causes and its effects ozone. Ozone layer introduction the ozone layer refers to the ozone within stratosphere, where over 90% of the earths ozone resides. Another most feared aspect of pollution is depletion of ozone layer of the stratosphere. The ozone layer is a belt of the naturallyoccuring gas ozone that sits. The subtropical ground ozone concentration in northern hemisphere is twice the corresponding region in southern hemisphere 5. Progress report 2003 united nations environment programme, environmental e. The ozone layer or ozone shield is a region of earths stratosphere that absorbs most of the suns ultraviolet radiation. Highly reactive species like hydrogen peroxide is produced which has bad effects on human health. Jul 02, 2015 this quick video discusses the role of the ozone layer and how cfcs can cause ozone depletion. Feb 04, 2018 ozone is the layer present in stratosphere which protects the life on earth from harmful effects of uv radiations.
Health and environmental effects of ozone layer depletion. Unfortunately, dna readily absorbs highenergy uvb radiation and. It is an essential factor for many global, biological and environmental phenomena. Ashes can stay in the stratosphere for about two to five years, and within. As the eruption of mount pinatubo proved in 1991, natural eruptions can have a dramatic negative effect on the manmade ozone layer depletion chemicals that are in the atmosphere. It will magnify the effects of ultraviolet rays on human health. The ultraviolet uv rays emitted from sun are captured by ozone and thereby provide a stable ontological structure in the biosphere. Emissions of ozonedepleting substances odss in the usa have been.
The term ozone depletion can refer to a number of distinct, but related phenomena. The impact of the interaction of climate changes and ozone depletion on the expected levels of ambient uv exposure and resulting effects on neoplasms have. In comparison with the earlier assessments on effects of ozone depletion, the present report has a new section. The level from which it extends outward varies with latitude. These models work by combining satellite measurements of. Mar 21, 2020 ozone depletion, gradual thinning of earths ozone layer in the upper atmosphere caused by the release of chemical compounds containing gaseous chlorine or bromine from industry and other human activities. Due to stratospheric ozone layer depletion uv radiations are penetrating in earth atmosphere which result in the production of reduced oxygen. Ozone layer the ozone layer is basically naturally occurring gas in the region of stratosphere where ozone particles are accumulated 2. Ozone absorbs a band of ultraviolet radiation called uvb. Protecting the ozone layer and reducing global warming undp. The depletion of atmospheric ozone also has detrimental effects on animals and the natural environment. Indeed, calculations based on laboratory studies with plants suggest that the biological impact of ozone depletion measured by the formation of cyclobutane pyrimidine dimers in dna is likely to be less marked than previously thought, because uva quanta 315400 nm may also cause significant damage, and uva is unaffected by ozone depletion. An ongoing international collaboration the most recent wmounep scientific assessment of ozone depletion. We have seen the various effects of ozone layer depletion and can conclude by saying that it is very important for our survival.
May 30, 2017 as the eruption of mount pinatubo proved in 1991, natural eruptions can have a dramatic negative effect on the manmade ozone layer depletion chemicals that are in the atmosphere. The causes, mechanism and bio effects of ozone layer depletion on humans were addressed. Effects and measures to protect ozone layer depletion. Apr 18, 2019 the ozone layer helps to protect life from harmful ultraviolet radiation. Let us have a detailed look at the various causes and effects 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. There are many situations where human activities have.
How severe is the depletion of the antarctic ozone layer. The evolution of ozone layer depletion, its impact on. Ozone o3 is a stratospheric layer that plays important role in providing support to humans for their survival. Stratospheric ozone depletion leads to an increase in uvb that reach the earths surface, where it can disrupt biological processes and damage a number of materials. About depletion of the ozone layer is the anticipated increase in the amounts of. This layer of ozone that covers our planet like a blanket is slowly thinning due to the greenhouse gas emissions in the atmosphere. There are many situations where human activities have significant effects on the environment. Tracking down lingering source of carbon tetrachloride emissions. The effects of ozone depletion discovering antarctica. Stratospheric ozone depletion noaas earth system research.
But, ozone depletion is also concerning because it directly impacts the health of humans, and other living organisms. Basic ozone layer science ozone layer protection us epa. Various anthropogenic activ i ties such as emissions of cfcs, hcfcs and other organohalogens lead to the depletion of ozone. Reducing the use of ozone depletion substances ods. Ozone is an irritating, corrosive, colorless gas with a smell something like burning electrical wiring. Ozone is a gas that is present in the ozone layer in the stratosphere of the earth. It is ideal photochemical maker due to its long life and stability 1 34. The troposphere extends from the surface up to about 10 km in altitude, although this height varies with latitude. The earths ozone layer ozone layerthe region of the stratosphere containing the bulk of atmospheric ozone.
Stratospheric ozone layer depletion is one of them. In fact stratospheric ozone layer has the ability to filter the uv radiations. Ozone is the layer present in stratosphere which protects the life on earth from harmful effects of uv radiations. The earths atmosphere is composed of several layers. Ozone layer depletion effects on the environment effects on nonhuman animals a november 2010 report by scientists at the institute of zoology in london found that whales off the coast of california have shown a sharp rise in sun damage, and these scientists fear that the thinning ozone layer is to blame. Pdf causes of ozone layer depletion and its effects on. The ozone hole and global warming union of concerned scientists. However, various factors have led to the depletion and damage of this protective layer.
Ozone depletion simple english wikipedia, the free encyclopedia. Causes of ozone layer depletion and its effects on human. The effect of atmospheric ozone depletion on environment. The montreal protocol on substances that deplete the ozone layer. One of the main reasons for the widespread concern about depletion of the ozone layer is the anticipated increase in. Ozone layer depletion cause, effects, and solutions. But many researchers do not agree with these predictions,14 and express their. 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. The evolution of ozone layer depletion, its impact on climate change, health and the environment. These ashes contain high concentration of bromine and chlorine. Ozone layer depletion is one of the major environmental issues which is getting thinner day by day as a result of increasing pollution.
We often think of ozone layer depletion as a modern problem, but it is something that started well before the 1970s. Since about the 1970s, there has been a decrease in total volume of the ozone in the ozone layer, of about 4%, per decade. Context following the implementation of the ban on cfcs, the ozone layer has been slowly recovering. The earths ozone layer is mainly found in the lower portion of the stratosphere from approximately 20 to 30. The ozone layer is responsible for absorbing harmful ultraviolet rays, and preventing them from entering the earths atmosphere. The human released chlorofluorocarbons are the main and primary causes to destroy ozone layer. If interested, you can purchase this powerpoint from.
The thinning is most pronounced in the polar regions, especially over antarctica. After a decade of relentless enlargement and deepening, it seems that ozone layer depletion might eventually be curbed, and precfc levels of the ozone layer reached by the midtwentyfirst century. Ozone depletion is primarily caused by human activities. There are suggestions below for improving the article. We often think of ozone layer depletion as a modern problem, but it. The lowest layer, the troposphere tropospherethe region of the atmosphere closest to the earth. Normal ozone ozone layer depletion and its effects.
Laboratory and epidemiological studies demonstrate that uvb causes nonmelanoma skin cancer and plays a major role in malignant melanoma development. 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. Ozoneclimate interactions and effects on solar ultraviolet radiation at the earths surface. There are many situations where human activities have significant effects on our environment. Ozone layer depletion causes and effects of ozone layer. This can only be done by reducing the use of compounds which react in the atmosphere to harm the ozone layer. Ozone depletion facts and information national geographic. Causes and effects of ozone layer depletion that are. Ozone depletion consists of two related events observed since the late 1970s.
This ozone layer sustains life on the earth by absorbing a great deal of uv ultra violet light radiating out of sun. The evolution of ozone layer depletion, its impact on climate. Learn more about the process, causes, and effects of ozone layer depletion. Pdf there are many situations where human activities have. The latter phenomenon is referred to as the ozone hole. Ozone depletion simple english wikipedia, the free. These chemicals are found in cleaning agents, aerosols, insulating foam, and refrigerants. The envelope of air or different types of gases surrounding the earth is known as atmosphere.
Editors may also seek a reassessment of the decision if. Stratospheric ozone depletion leads to an increase in uvb that reach the earths surface, where it can disrupt biological processes and damage a number of materials the fact that uvb can cause biological effects is well demonstrated by the familiar sunburn that follows overexposure to the sun. Its a known air toxin and it eats away at the ozone layer. The chlorofluorocarbon and the halons are potent ozone depletors. Project report on ozone depletion environmental pollution. Pdf depletion of the ozone layer and its consequences. Ozone depletion, gradual thinning of earths ozone layer in the upper atmosphere caused by the release of chemical compounds containing gaseous chlorine or bromine from industry and other human activities. Timeline of stratospheric ozone depletion and observations.
Measures should be taken to protect our earth from the harmful ultraviolet rays. It is revealed that introduction of chloroflourocarbons cfcs in the environment is the most rated cause of said depiction. Its a known air toxin and it eats away at the ozone layerthe gas accounts for about 1015 percent. The main effect of ozone depletion is an increase in uvb rays reaching the earths surface causes. Ground ozone concentration is lower in polar and equatorial regions. Ozone layer depletion increases the amount of uvb that reaches the earths surface. Ppt ozone layer depletion authorstream presentation. 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 maps were produced with data collected by statellite istruments, including the ozone monitoring instrument on the aura satellite.
Environmental effects of ozone depletion ceda document repository. Ozone layer depletion, its causes and its effects free download as powerpoint presentation. 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. Ozone depletion was a good articles nominee, but did not meet the good article criteria at the time. For human populations, the most dangerous effects of exposure to greater uvb radiation are. Combining these models of stratospheric ozone and uv radiation with understanding of the. Environmental effects of ozone depletion, uv radiation and.19 1123 745 1353 241 65 938 1106 1287 756 608 179 615 609 1089 1183 192 579 938 702 267 1269 1350 468 134 410 192 770 1179 327 1408 328 1161 1231