Environmental effects and interactions of stratospheric ozone. Stratospheric ozone depletion, ultraviolet radiation and health. Ozone depletion biology science fair project ideas. What is the relationship between the greenhouse effect. Global climate change and ozone depletion a free powerpoint ppt presentation displayed as a flash slide show on id. Plankton plays a pivotal role in the ability of oceans to draw carbon dioxide the primary global warming chemical from the atmosphere, thereby making oceans along with rainforests important carbon sinks. Ozone depletion the decomposition and production ofthe good ozone is a natural process. In 1992, the alliance requested the phaseout schedule for cfcs and certain hcfcs be accelerated. Skeptics vs ozone hole lunar and planetary laboratory. This idea connects two issues global warming and depletion of ozone in the upper atmosphere inappropriately, which diverts attention from the main cause of global warming. Ozone depletion is allowing the uv radiation to earth surface. Global warming stopped in 1998 because it is controlled by ozone depletion, not greenhouse gases. Ozone depletion, greenhouse gases, and climate change. Environment pollution climate change and global warming.
The ozonedepletion theory of global warming provides, for the first time, a clear, straightforward explanation for observations not easily explained by greenhousegas theory. Are those holes in the ozone layer the main factor responsible for global warming. Ozone depletion and global warming overview page 1 of 5 halocarbons are chemical compounds containing carbon, one or more halogens, and sometimes hydrogen. The treaty is structured around several groups of halogenated hydrocarbonsthat deplete stratospheric ozone. Following is the list of some of the main ozone depleting substances and the sources from where they are released. Who climate change and human health risks and responses. Addresses two major environmental issues associated with the earth1s atmosphere.
Global warming is caused by the greenhouse effect, which is essential to life as we know it on planet earth. Scientists 100 years ago would have been incredulous at the. The next most significant greenhouse gas is surface, or lowlevel, ozone o3. Ozonedepleting potential odp is the ratio of the impact on ozone caused by a chemical compared to the impact of a similar mass of cfc11.
Pdf ozone depletiona warning of global warming researchgate. Difference between ozone depletion and global warming. Among others, robert watson had a role in the science assessment and in the regulation efforts of ozone depletion and global warming. Instead of looking back at the successful cfc phaseout, the u. Global warming potential gwp is the ratio of the warming caused by a substance compared to.
Inservice teachers knowledge and misconceptions of global. Basic ozone layer science ozone layer protection us epa. Ozone o 3 depletion does not cause global warming, but both of these environmental problems have a common cause. If the global warming trend continues, the results could be depressing indeed. In other words, global warming can make ozone depletion much worse right when it is supposed to. The greenhouse is covered with a kind of plastic walls which permits all radiations from the sun. Both ozone depletion and global warming adversely affect the life on earth. Ozone depletion may also make it harder to combat global warming, because more uv light penetrates the worlds oceans and destroys plankton. Ozone depletion and climate change, or ozone hole and global warming in. Most notably, chlorofluorocarbons cfcs were used in refrigerators, freezers, air conditioning units, and as the propellant in spray bottles. 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. The earths ozone layer ozone layerthe region of the stratosphere containing the bulk of atmospheric ozone. R111, 2 global warming potential 100 year, ipcc 4th assessment report, 2007. Ozone and global warming 3 key facts to better understand ozones role in global climate change.
Evs global warming, ozone depletion ppt ozone depletion. The montreal protocol on the protection of the global ozone layer is a somewhat. Pdf the success of ozone depletion as a social problem is used to examine and understand the relative failure of global warming. Beginning in the late 1970s, a large and rapid decrease in total ozone, often by more than 60 percent relative to the global average, has been observed in the. Human activities cause ozone depletion and global warming. Tthe ozone hole and global he ozone hole and global wwarming 1arming 1 the ozone hole and global warming global warming global warming is an increase in the average temperature of the earths atmosphere, leading to climate change.
Most of global warming is being caused by increasing concentrations of greenhouse gases produced by human activities. Will global climate change alter the effects of uv radiation on human health. Global warming refers to an unequivocal and continuing rise in the average temperature of earths climate system. 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. Examination of ozone depletion data shows that an absence of. Why global mean surface temperatures began to rise around 1970 after having been relatively constant since 1945. The ozone layer lies approximately 1540 kilometers 1025 miles above the earths surface, in the stratosphere. Can the increased temperature due to global warming increase the deleterious effects of uvb radiation on plastics and wood products used. Stratospheric ozone depletion, ultraviolet radiation and health strictly, stratospheric ozone depletion is not part of global climate change, which occurs in the troposphere. Pdf causes of ozone layer depletion and its effects on. Ozone depletion and global warming potentials of cf3i. It is thought by many to be caused by our use of fossil fuels such as oil, gas and coal. The chlorofluorocarbon and the halons are potent ozone depletors. It was agreed on 16 september 1987, and entered into force on 1 january 1989.
Download a pdf of ozone depletion, greenhouse gases, and climate change by the national research council for free. Global warming and ozone layer depletion are two different problems see the. When there was no ozone layer, life could only exist in. Global warming global warming surfacelevel ozone and other compounds. The accumulation in the earths atmosphere of these gases is mainly the result of the gargantuan consumption of the developed countries, particularly the united states. It represents industry sectors that rely on fluorocarbons such as cfcs, hcfcs, and hfcs. Global warming and ozone layer depletion are two different problems see the sidebar misconceptions about global atmospheric change on page 95. Causes of ozone layer depletion and its effects on human.
Experts blame ozonelayer depletion on manmade chem icals containing. Ozone depletion and climate change, or ozone hole and global warming in more popular terms, are environmental challenges whose connections have been explored and which have been compared and contrasted, for example in terms of global regulation, in various studies and books there is widespread scientific interest in better regulation of climate change, ozone depletion and air pollution, as. Ozone o3 depletion and global warming, but are environmental problems and have a common cause. The ozone hole and global warming union of concerned scientists. The thinning is most pronounced in the polar regions, especially over antarctica. Understanding both these phenomena are important for the survival of life on. Mar 28, 2020 clouds, as well as ozone have a tremendous affect on uv radiation levels.
Ozone layer depletion causes, effects and solutions 7. The treaty is structured around several groups of halogenated hydrocarbonsthat deplete stratospheric. Far above earths surface, the ozone layer helps to protect life from harmful ultraviolet radiation. Evs global warming, ozone depletion ppt free download as powerpoint presentation. The ozone scare was a dry run for the global warming scare.
The ozone hole and global warming union of concerned. Ozone depletion worsened globally throughout the 1990s, with peak ozone losses. Plankton plays a pivotal role in the ability of oceans to draw carbon dioxide the primary global warming chemical from the atmosphere, thereby making oceans along with rainforests important carbon. Can ozone depletion and global warming interact to produce. Turkish primary science teacher candidates understandings of.
Reads information and answers questions about the ozone hole and global. Ozone depletion and climate change, or ozone hole and global warming in more popular terms, are environmental challenges whose connections have been explored and which have been compared and contrasted, for example in terms of global regulation, in various studies and books. Permanent or temporary blindness, skin cancer and immunity suppression are the main effects of these radiations reported by various researchers on humans. A warming trend and stratospheric ozone depletion have been observed in europe over the last four decades. These changes result in a warming of the troposphere and a cooling of the stratosphere. The good ozone layer is located between 20 km and 40 km above the earths surface and is very important to all life on earth, as it stops harmful radiation from the sun from reaching the. Ozone depletion and global warming linkedin slideshare. Ozone layer protection european commission europa eu. Global warming surfacelevel ozone and other compounds. In 1928, cfcs were developed as ideal gases to be used as refrigerants. How does ozone depletion causes global warming answers.
Jul 16, 2008 ozone o 3 depletion does not cause global warming, but both of these environmental problems have a common cause. The pattern of climate trends during the past few decades is marked by rapid cooling and ozone depletion in the polar lower stratosphere of both hemispheres, coupled with an increasing strength of the wintertime westerly polar vortex and a poleward shift of the westerly wind belt at the earths surface. Global warming is caused primarily by putting too much carbon dioxide into t. Stratospheric cooling is a key factor in the development of ozone holes over the poles. Global warming and the depletion of the ozone o3 layer. Turkish primary science teacher candidates understandings. Ozone layer depletion cause, effects, and solutions. The european environment and health committee identified the need to assess these topics in 1997, as part of the leadup to the third ministerial conference on envi. Linde strongly advocates the use of refrigerant gases with zero ozone depletion potential and fully supports the phase out of hcfcs.
Questions and answers about the environmental effects of the ozone layer depletion and 3 climate change. All of the ozone depleting substances controlled by. The ozone depletion theory of global warming less ozone in the stratosphere allows more highenergy, ultraviolet radiation to reach earth. The ozone hole is an area in the stratosphere above antarctica where chlorine and bromine gases from humanproduced chlorofluorocarbons cfcs. In this paper we will attempt to examine the relationship between global warming and ozone layer depletion, subsequently try to look at the possible solutions. The findings suggest that some inservice teachers hold various scientific misconceptions regarding global warming and the ozone layer. Ozone depletion potentials and global warming potentials the effectiveness of bromine compared with chlorine on a peratom basis for global ozone depletion, typi cally referred to as. Ozone depletion, greenhouse gases, and climate change the.
Begins with an assessment of how the atmosphere naturally influences the earth1s climate and how that climate has behaved in the past. The entire story of ozone depletion due to chlorofluorocarbons cfc was just that, a story, a scientifically created deception. Mar 21, 2020 the most severe case of ozone depletion was first documented in 1985 in a paper by british antarctic survey bas scientists joseph c. Effects on eyes the major cause of blindness in this world is. Global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars. Ozone depletion greenhouse gases and climate change.
Spectrometer toms multimedia files that show the history of the ozone hole. Protecting the ozone layer and reducing global warming undp. Environmental effects of ozone depletion montreal protocol unep. Dec 05, 2015 the entire story of ozone depletion due to chlorofluorocarbons cfc was just that, a story, a scientifically created deception. Some halocarbons ozone depleting substances, or odss deplete the ozone layer, while others greenhouse gases, or ghgs are thought to contribute to global warming. Tthe ozone hole and global he ozone hole and global global. The wri report is entirely designed to blame developing countries for sharing the responsibility for global warming. Ppt global climate change and ozone depletion powerpoint.
Pdf there are many situations where human activities have significant effects on the environment. Find out what caused the ozone hole, and how the 1989 montreal protocol sought to put an end to ozone depletion. Apr 18, 2019 the ozone layer helps to protect life from harmful ultraviolet radiation. Linde also advocates the use of lower global warming potential gases when they contribute to an overall reduction in the carbon footprint of refrigeration systems. The world health organization was established in 1948 as a. The 1989 montreal protocol successfully phased out cfc production and use. There are, however, several recently described interactions between ozone depletion and greenhouse gasinduced warming. Questions and answers about the environmental effects of. The ozone layer helps to protect life from harmful ultraviolet radiation.
However, cloudy skies generally do not offer significant protection from uv. In 1986, the alliance called for a global solution to address ozone depletion. The ozone hole is an area in the stratosphere above antarctica where chlorine and bromine gases from humanproduced chlorofluorocarbons cfcs and halons have destroyed ozone molecules. This increase in uvb light has not previously been thourougly. Ozone depletion allows more ultraviolet radiation to reach the earths surface, which can cause cancer. A greenhouse or a farm house is a very big enclosure for the plants in a farm to save them from an extremely cold temperature in winter. They argued that global warming instruction should help students distinguish ozone layer depletion from global warming, and understand that the ozone hole does enhance the greenhouse effect. Ozone depletion facts and information national geographic. The key difference between ozone depletion and global warming is that ozone depletion is the decrease in the thickness of the ozone layer, whereas global warming is the increase of heat in the atmosphere ozone depletion and global warming are two major environmental concerns the worlds population face today.
Ozone depleting substances are the substances such as chlorofluorocarbons, halons, carbon tetrachloride, hydrofluorocarbons, etc. To get a global view of ozone concentrations and its distribution, scientists use data from satellites. The thinning ozone layer does not result in significant increases in global temperatures several manmade molecules are a threat to the ozone layer. Thin or scattered clouds can have minor impacts on uv and even, for a short time increase in uv, it would be on a blue sky day by further scattering. But this time, the costs of overreacting will be far higher. Now, the evidence, much of which was known at the start but deliberately ignored, is emerging. Greenhouse gases, global warming and the ozone layer atmosphere and climate greenhouse gases. There are many situations where human activities have significant effects on the environment. Prior to the 1980s, the eu, nasa, nas, unep, wmo and the british government had dissenting scientific reports and watson played a role in the process of unified assessments. The exposure to these radiations is severely affecting all life forms on earth, especially the humans.
Publications about the ozone depletion theory of global. Them have parallels in the current global warming debate. Strictly, stratospheric ozone depletion is not part of global climate change, which occurs in the troposphere. The lesson format is based on a series of questions.
Another important linkage involves the way that ozonedepleting substances and greenhouse gases alter certain processes in the atmosphere so as to enhance both global warming and stratospheric ozone depletion. Ozone in the lower atmosphere contributes to global warming and climate change. Fifteen teachers participated in this interviewdriven qualitative research inquiry. Ozone depletion reasons, impacts, prevention by reshma. Ozone depletion and global warming research commons. Ozone layer depletion fueled by falling temperature in the stratosphere can be termed as yet another hazardous effect of global warming on the earth. Share flipboard email print lowlevel ozone is a major component of smog. 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 is an international treaty designed to protect the ozone layerby phasing out the production of numerous substances that are responsible forozone depletion.
The ozone hole and global warming are not the same thing, and neither is the main cause of the other. The depletion of ozone layer has trickle down effects in the form of global warming, which in turn leads to melting of polar ice, which will lead to rising sea levels and climatic changes around the world. Many of them have parallels in the current global warming debate. Ozone depletion has largely been controlled through operative pediatric urology pdf the montreal.
As with ozone depletion, the evidence that global warming poses a genuine threat in need of immediate countermeasures is still quite weak, raising the possibility that the kyoto protocol will be another overreaction to an exaggerated environmental concern. As you may know, we decline a substantial proportion of manuscripts without sending them to referees, so that they may be sent elsewhere without delay. Jul 23, 2018 when sufficient amounts of ozone have been destroyed, the low concentration area is often called a hole in the ozone layer, with increased uv radiation making it to the surface below. It was a forerunner and template for the much larger deception of global warming entirely due to human produced co2. Cfcs also contribute to global warming, with a global warming potential. The primary natural source of surface o3 is the subsidence of. It is actually the global warming that actually encourages the ozone depletion. Measured infrared absorption data are also combined with the lifetime to show that the 20. Global warming and the depletion of the ozone o3 layer the average surface temperature on earth has increased approximately 1. Ozone depletion being a direct result of global warming will also contribute to increase of global warming as its. From protecting the ozone layer to preventing global warming 1 advent of the ozone layer depletion issue chlorofluorocarbons cfcs do not exist in nature. Apr 23, 2017 global warming ppt and pdf free to download. Keep in mind that some environmentalists have used similar techniques to mislead and distort the truth. However, the key difference between ozone depletion and global warming is that ozone depletion is the decrease in the thickness of the ozone layer whereas global warming is the increase of heat in the atmosphere.
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