Ozone depletion and global warming an integrated approach. 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. Pdf ozone depletiona warning of global warming researchgate. Why global mean surface temperatures began to rise around 1970 after having been relatively constant since 1945. The 1989 montreal protocol successfully phased out cfc production and use. If the global warming trend continues, the results could be depressing indeed. Global warming refers to an unequivocal and continuing rise in the average temperature of earths climate system. Jun 14, 2017 manmade global warming is the largest scientific fraud ever, based on a single grain of fact out of a beach full of sand. Global warming concerns understanding the macrosystem, such as the why and wherefore of the current observed increase in planetary atmospheric temperatures see also how atmospheric chemistry and physics effects global warming. Publications about the ozone depletion theory of global warming. Ozone layer is a thin protective layer in the atmosphere of the earth which keeps ultraviolet rays away from earth and keeps us safe from the harmful effects of uv rays.
Pdf ozone depletion, greenhouse gases, and climate change. An editable word document for this worksheet is included. The ozone scare was a dry run for the global warming scare. Ozone depletion and global warming linkedin slideshare. How saving the ozone layer in 1987 slowed global warming 6 december 2019, by alvin stone a nasa image showing the ozone hole at its maximum extent for 2015. The nitric oxides produced by the weapons could reduce the ozone levels in the northern hemisphere by as much as 30 to 70 percent. The ozone layer is a natural layer of gas in the upper atmosphere that protects humans and other living things from harmful ultraviolet uv radiation from the sun. This ozone layer filters out ultraviolet uv rays from the sun and protects life on earth. Apr 18, 2019 the ozone layer helps to protect life from harmful ultraviolet radiation. Pdf there are many situations where human activities have significant effects on the environment. Importance of the ozone layer, effects of ultraviolet light on humans, location of ozone in atmosphere, graphing ozone concentration, reading comprehension on conflicting scientific viewpoints. Back in the 1980s, when the hole in the ozone layer was the worlds numberone environmental problem, few people worried about global warming. In 1987, a group of nations signed a document called the montreal protocol. There is also evidence that ozone depletion is masking global warming, because ozone depletion cools the stratosphere even though the earths surface temperatures are higher than historic averages.
As scientists have investigated these two environmental phenomena, some have made some effort to show that these two effects are somehow related. Because the ozone layer normally blocks ultraviolet uv light, an ozone hole allows more uv light than usual to reach the surface. The global warming potential gwp is a metric for determining the relative contribution of a substance to. The effects of ozone depletion and volcanic aerosols on climate. The existing 2030 phaseout does little to guide industry into the investments needed for research and development to make existing nonfluorocarbonbased alternatives more affordable. It was agreed on 16 september 1987, and entered into force on 1 january 1989. The assessment documents the advances in scientific understanding of ozone. Ozone layer protection european commission europa eu. How saving the ozone layer in 1987 slowed global warming. Greenhouse gas emissions affecting the ozone layer largely consist of. These are two environmental conditions which are faced by the world today. Ozone is constantly being produced and destroyed naturally. The ozone hole was much more seen as a hot issue and imminent risk compared to global climate change, as lay people feared a depletion of the ozone layer ozone shield risked increasing severe consequences such skin cancer, cataracts, damage to plants, and reduction of plankton populations in the oceans photic zone.
The treaty is structured around several groups of halogenated hydrocarbonsthat deplete stratospheric. Oct 02, 2019 the nitric oxides produced by the weapons could reduce the ozone levels in the northern hemisphere by as much as 30 to 70 percent. The use of cfcs not only destroys the ozone layer but also leads to global warming. Unep develops a global convention to protect the ozone layer. Evs global warming, ozone depletion ppt free download as powerpoint presentation. Most notably, chlorofluorocarbons cfcs were used in refrigerators, freezers, air conditioning units, and as the propellant in spray bottles. Saving the ozone layer is warming the planet but it can be. Ozone o 3 depletion does not cause global warming, but both of these environmental problems have a common cause. The ozone hole and global warming union of concerned. The ozone layer outside the polar regions is projected to recover to its pre1980 levels some time before the middle of this century. The 2010 report found, over the past decade, global ozone and ozone in the arctic and antarctic regions is no longer decreasing but is not yet increasing. When large, explosive vol both the onset of rapid warming by 1970 and the. This thesis examines global warming and the possible contribution that.
The current tentative consensus is that global warming is a reality, but it is uncertain how much this is caused by. Tthe ozone hole and global he ozone hole and global global. Scientific assessment of ozone depletion montreal protocol. As scientists have investigated these two environmental phenomena, some have made some effort to.
Troposphere tropopause stratosphere stratopause mesosphere mesopause thermosphere thermopause exosphere ionosphere ozone layer 7. It was during that year that the montreal protocol established a scheme that led to a total global ban of the production of cfcs by the late 1990s. Find out what caused the ozone hole, and how the 1989 montreal protocol sought to put an end to ozone depletion. By the mid1980s a severe seasonal thinning of ozone over the antarctic was observed and by 1987 the worlds media were reporting on a hole in the ozone layer. 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. Three decades after montreal, the ozone layer is showing signs of recovery. Depletion of the ozone layer is what triggers global warming. The ozone hole and global warming are not the same thing, and neither is the main cause of the other. Dec 12, 2019 the montreal protocol, a 1987 international treaty prohibiting the production of chlorofluorocarbons cfcs to save the ozone layer, was the first successful multilateral agreement to successfully slow the rate of global warming, according to new research.
Ozone is a variant of oxygen, the ozone molecule having three atoms of oxygen. Experts blame ozonelayer depletion on manmade chem icals containing. Cppfes2043a prevent ozone depleting substance and synthetic greenhouse gas emissionsdate this document was. Are those holes in the ozone layer the main factor responsible for global warming. 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. Greenhouse gas emissions affecting the ozone layer largely consist of water. The emission of ozone depleting substances has been damaging the ozone layer. Ozone depletion reasons, impacts, prevention by reshma. Global warming is predicted to cause rising ocean levels, lower plant productivity, and more frequent and dangerous weather patterns. Cfcs also contribute to global warming, with a global warming potential. Therefore, the economic activities of the human have resulted in depletion of the ozone layer and increasing the global warming on the earth and it accounts to 82% of the total ozone layer depletion and global warming desmet and rossihansberg 2015. Spectrometer toms multimedia files that show the history of the ozone hole.
Ozone depletion and global warming are two major environmental concerns with serious implications for the future development of the refrigerationbased industries. Is global warming just a myth like the ozone layer depletion. It is thought by many to be caused by our use of fossil fuels such as oil, gas and coal. The ozone layer helps to protect life from harmful ultraviolet radiation. Background the objective is to link the normal change or event to human activity to form the basis for a political agenda culminating in control of people. The thinning ozone layer does not result in significant increases in global temperatures several manmade molecules are a threat to the ozone layer. Manmade global warming is the largest scientific fraud ever, based on a single grain of fact out of a beach full of sand. However, the additional energy added to the earth system from the ozone hole is so small that it couldnt be responsible for the warming trend thats been occurring. The effects on the industry of the actions to reduce ozone depletion and global warming are now apparent. Climate is the average weather at a given point and time of year, over a long period typically 30 years. Ozone layer depletion fueled by falling temperature in the stratosphere can be termed as yet another hazardous effect of global warming on the earth. This thesis examines global warming and the possible contribution that ozone.
Global warming and ozone layer depletion are two different problems see the. The stratospheric ozone layer is earths sunscreen protecting living things from too much ultraviolet radiation from the sun. 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. Environmental effects and interactions of stratospheric ozone. Global warming and the depletion of the ozone o3 layer the average surface temperature on earth has increased approximately 1. Although ozone is present in small concentrations throughout the atmosphere, most around 90% exists in the stratosphere, a layer 10 to 50 kilometres above the earths surface. The montreal protocol on the protection of the global ozone layer is a somewhat. The ozonedepletion theory of global warming provides, for the first time, a clear, straightforward explanation for observations not easily explained by greenhousegas theory. But through domestic and international action, the ozone layer is healing and should fully recover by about 2065. The ozone depletion theory of global warming provides, for the first time, a clear, straightforward explanation for observations not easily explained by greenhousegas theory. The montreal protocol, a 1987 international treaty prohibiting the production of chlorofluorocarbons cfcs to save the ozone layer, was the first successful multilateral agreement to successfully slow the rate of global warming, according to new research. To get a global view of ozone concentrations and its distribution, scientists use data from satellites. Now, experts argue that similar measures may lend hope to the climate crisis. Such a depletion might produce changes in the earths climate, and would allow more ultraviolet radiation from the sun through the atmosphere to the surface of the earth, where it could produce dangerous burns and a variety of potentially dangerous ecological.
Ozone depletion and global warming are related concepts but certainly not the same. Unfortunately we punched a hole in it, through the use of gases like chlorofluorocarbons cfcs in spray cans and refrigerants, which break down ozone molecules in the upper atmosphere. Oct 12, 2005 instead, they should be adopting longerterm solutions that protect the ozone layer and mitigate global warming. So if we make awareness among people we can sav e ozone layer from depletion, ecosystem imbalance, and o ther. 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. Most of global warming is being caused by increasing concentrations of greenhouse gases produced by human activities.
Ozone layer is an international treaty designed to protect the ozone layerby phasing out the production of numerous substances that are responsible forozone depletion. Global warming and the depletion of the ozone o3 layer. Ozone hole is both environmental success story and global threat. Ozone hole is both environmental success story and global. Protecting the ozone layer and reducing global warming undp. Global warming during the last 50 years, two environmental issues have received significant attentionglobal warming and the hole in the ozone layer. Such a depletion might produce changes in the earths climate, and would allow more ultraviolet radiation from the sun through the atmosphere to the surface of the earth, where it could produce dangerous burns and a variety of potentially dangerous ecological effects. Global open source 3d pdf warming potential gwp is the ratio of the warming caused by a substance. When the ozone layer is depleted either by humanmanufactured cfcs b or by chlorine and bromine emitted by volcanic eruptions c, more ultravioletb sunlight than normal reaches the ocean, warming earth. The ozone layer, which lies high up in the atmosphere, shields us from harmful ultraviolet uv rays that come from the sun. In this paper the effects on stratospheric ozone are compared to the contribution to global climate change for a number of inkind halon 1 alternatives.
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. 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. Ozone layer and green house eefect, global warming ozone. The existing 2030 phaseout does little to guide industry into the investments needed for research and development to make existing non. Twenty questions and answers about the ozone layer. Human activities cause ozone depletion and global warming. Yes, with all things being equal, more co2 does add a very small amount of warming, but very little. Instead, they should be adopting longerterm solutions that protect the ozone layer and mitigate global warming.
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