Initially, the students were instructed to make drawings. Ozone depletion, greenhouse gases, and climate change. Slow speeds and idling vehicles produce, per trip, 4 to 8 times more pollutants and consume more carbon footprint fuels, than free flowing traffic. It is very reactive chemically and is dangerous to plant and animal life when present in the lower portions of the. The causes, mechanism and bioeffects of ozone layer depletion on humans were addressed.
Publications about the ozone depletion theory of global warming. Due to global warming and green house effect most of the heat is trapped in troposphere which is the layer below the stratosphere. As we all know ozone is present in stratosphere so heat dont reaches troposphere and it remain cold as recovery of ozone layer requires maximum sunlight and. List of books and articles about ozone layer online. Ozone depletion facts and information national geographic. The ozone layer helps to protect life from harmful ultraviolet radiation. This can only be done by reducing the use of compounds which react in the atmosphere to harm the ozone layer. The ozone hole and global warming union of concerned. Cfc molecules are highly stable and can last for up to 100 years. Ozone by ucar randy russell is licensed under cc bysa. Stratospheric ozone depletion, ultraviolet radiation and.
When the ozone layer is depleted, more ultravioletb radiation than usual reaches earth, increasing our risk of sunburn and skin cancer and warming earth. The enhanced lower stratospheric cooling over the polar cap region renders the stratospheric ozone layer more susceptible to ozone destroying chemicals 84, 85. How is global warming related to ozone layer depletion. Over what sections of earth does ozone depletion occur. Protecting the ozone layer and reducing global warming undp. Ozone layer depletion causes, effects and solutions 7. Publications about the ozone depletion theory of global. 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. Ozone depleting substances are the substances such as chlorofluorocarbons, halons, carbon tetrachloride, hydrofluorocarbons, etc. The depletion of the ozone layer 1593 words 7 pages. Ozone depletion reasons, impacts, prevention by reshma.
This book starts off by examining the rapid global warming that clearly did occur between 1970 and 1998 and that, in my view, appears to have been caused by humans depleting the ozone layer, located 12 to 19 miles 20 to 30 km above earths surface. Human activities and ozone layer free download as powerpoint presentation. As we all know ozone is present in stratosphere so heat dont reaches troposphere and it remain cold as recovery of ozone layer requires maximum. 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. Figure q182 top panel using their ozone depletion potentials odps and global warming potentials gwps, which indicate the effectiveness of each gas in causing ozone depletion and climate change, respectively. Pdf ozone depletion, greenhouse gases, and climate change. Human activities that can damage or affect the ozone. Ozone o 3 is a gaseous molecule that occurs in different parts of the atmosphere figure 1. The intergovernmental panel on climate change concldes that anthropogenic greenhouse gases are extremely likely to have been the dominant cause of observed global warming. Ultraviolet rays can also have bad effects on nature. The chlorofluorocarbon and the halons are potent ozone depletors. International relations political science regional focusarea studies environmental law, international interpretation and construction global warming reports international environmental law ozone layer depletion.
Pdf causes of ozone layer depletion and its effects on. Global warming and ozone layer depletion are two different problems see the sidebar misconceptions about global atmospheric change on page 95. Are those holes in the ozone layer the main factor responsible for global warming. This study aims to investigate students conceptual understanding about global warming and ozone layer depletion. There are many situations where human activities have significant effects on the environment. Global warming surfacelevel ozone and other compounds. A global thinning of the ozone layer results as ozone rich air from the remaining ozone layer flows into the ozone poor areas.
Scientists believe that global warming will lead to a weaker ozone layer, because as the surface temperature rises, the stratosphere the ozone layer being found in the upper part will get colder, making the natural repairing of the ozone slower. Can ozone depletion and global warming interact to produce. This ozone layer filters out ultraviolet uv rays from the sun and protects life on earth. The kigali amendment to the montreal protocol entered into force this week, mandating the phase down of super climate pollutants called hydrofluorocarbons hfcs. Ozone is a colourless gas which is found in the stratosphere of our upper atmosphere. We have seen the various effects of ozone layer depletion and can conclude by saying that it is very important for our survival. These changes result in a warming of the troposphere the bottom 816 km of the atmosphere and a cooling of the stratosphere the layer above that extends to an altitude of about 50 km and contains the ozone layer. Ozone o 3 depletion does not cause global warming, but both of these environmental problems have a common cause. Minimum ozone levels in the antarctic decreased steadily throughout the 1990s, and less dramatic decreases have been found above other areas of the world. Mean global surface temperatures have remained essentially constant since 1998 while carbondioxide concentrations continue to increase. If the global warming trend continues, the results could be depressing indeed. Nearly 90% of earths ozone is in the stratosphere and referred to as the ozone layer.
Global warming is caused by the greenhouse effect, which is essential to life as we know it on planet earth. Ozone in the ozone layer is formed by the action of solar ultraviolet light on oxygen. 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. Greenhouse gas theory is based on an erroneous assumption made 150 years ago, that radiant thermal energy is additive. 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. Instead of looking back at the successful cfc phaseout, the u. 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. Find out what caused the ozone hole, and how the 1989 montreal protocol sought to put an end to ozone depletion. The thinning is most pronounced in the polar regions, especially over antarctica. The ozonedepletion theory of global warming provides, for the first time, a clear, straightforward explanation for observations not easily explained by greenhousegas theory. Ozone depletion, caused by manufactured chlorofluorocarbon gases and emissions of chlorine and bromine from effusive basaltic volcanic eruptions.
Global warming and ozone layer depletion are two different problems see the. The production of old cfc refrigerants, such as r12, has now been banned due to its effect on the ozone layer. Apr 18, 2019 the ozone layer helps to protect life from harmful ultraviolet radiation. Depletion of the ozone layer, however, explains all observations of global warming quite clearly. Because of its central role in concerns about climate change, carbon dioxide has gen. The odps of cfc11 and cfc12, and the gwp of co 2 all are assigned a value of 1. It is also one of the prime reasons which are leading to global warming. Evs global warming, ozone depletion ppt free download as powerpoint presentation.
Oct 12, 2005 global warming is predicted to cause rising ocean levels, lower plant productivity, and more frequent and dangerous weather patterns. Ozone depletion and climate change, or ozone hole and global warming in. And does ozone depletion result in measurable increases in uv radiation reaching earth. Ozone absorbs a band of ultraviolet radiation called uvb. The ozone scare was a dry run for the global warming scare. The ozone layer prevents most ultraviolet uv and other highenergy radiation from penetrating to the earths surface but does allow through sufficient ultraviolet rays to support the activation of vitamin d in humans. We solved that problem with the montreal protocol on substances that deplete the ozone layer stopping the increase in global temperatures by 1998.
Ozone layer depletion is one of the major environmental issues which is getting thinner day by day as a result of increasing pollution. Download a pdf of ozone depletion, greenhouse gases, and climate change by the national research council for free. Global warming also leads to ozone layer depletion. Measures should be taken to protect our earth from the harmful ultraviolet rays. Third, depletion of stratospheric ozone and global warming due to the buildup of greenhouse gases interact to alter uvr related effects on health. The ozone layer, 12 to 19 miles above earth, protects life on earth by absorbing harmful solar ultraviolet radiation. Both are essential for life but air also protects all of us and it is therefore understandable that the response to the depletion of the ozone layer became international. Because of these dynamical, chemical, and radiative feedbacks, the ozone hole and greenhouse warming issues are much more strongly coupled than has widely been assumed. Unfortunately, cfcs can eventually find their way into the earths atmosphere and the ozone layer. What really causes global warming greenhouse gases or. Ozone depletion and global warming are both manmade and interconnected, and they constitute the most serious environmental crises ever. Environmental politics climate change and knowledge politics pdf.
This climate benefit could double if airconditioning and refrigerating equipment can be made more efficient. Ozone is constantly being produced and destroyed naturally. Ozone layer depletion abebooks shop for books, art. Some halocarbons ozone depleting substances, or odss deplete the ozone layer, while others greenhouse gases, or ghgs are thought to contribute to global warming. Further, suspended particulate matter in the air affects vegetation and ecosystem both physically and chemically. The ozone hole and global warming are not the same thing, and neither is the main cause of the other. The entire story of ozone depletion due to chlorofluorocarbons cfc was just that, a story, a scientifically created deception. The concept of ozone depletion potential odp is widely used wuebbles et al.
Depletion of the ozone layer is what triggers global warming. Ozone depletion and climate change have usually been thought of as environmental issues with little in common other than their global scope. The ozone hole is an area in the stratosphere above antarctica. Following is the list of some of the main ozone depleting substances and the sources from where they are released. Now, the evidence, much of which was known at the start but deliberately ignored, is emerging. Let us have a detailed look at the various causes and effects of ozone layer depletion. Ozone layer depletion daily current affair article for upsc. 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.
Stratospheric ozone depletion chapter 8 understanding. Traffic congestion is a daily reality of indias urban centers. Ozone depletion, greenhouse gases, and climate change the. I have written many papers explaining what is wrong with greenhouse warming theory and how ozone depletion theory explains global warming since 1970 and throughout all of earth history far more accurately and in far greater detail than greenhouse warming theory.
Chapte r ozone depletion potentials, global warming. Timeline of stratospheric ozone depletion and observations. Ozone layer depletion daily current affair article for upsc, ias, civil services and state pcs examinations. The next most significant greenhouse gas is surface, or lowlevel, ozone o3. Recent warming was caused by ozone depletion due to emissions of humanmanufactured gases. Legislation on ozone depletion and global warming has forced the refrigeration industry to develop equipment to use alternative and new refrigerants. Spectrometer toms multimedia files that show the history of the ozone hole. In a warmer world, patterns of personal exposure to solar radiation e. The 1989 montreal protocol successfully phased out cfc production and use. Ozone depletion may also make it harder to combat global warming, because more uv light penetrates the worlds oceans and destroys plankton. Ozone layer depletion cause, effects, and solutions. Cfcs get banned in 1974 scientists sherry rowland and mario molina discovered the link between the depletion of the ozone layer and cfcs. The use of cfcs not only destroys the ozone layer but. Stratospheric cooling creates a more favourable environ.
There are indications that global warming could enhance ozone depletion even in the absence of anthropogenic pollutants, so the fate of the ozone layer is still uncertain. Causes of ozone layer depletion and its effects on human. 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. The climate system involves the atmosphere specifically processes within the troposphere, such as air circulation patterns land surfaces and oceans. Although global warming and ozone depletion are caused by different gases, scientists have shown that a warming planet may change how the stratosphereand, therefore. Ozone depletion has largely been controlled through operative pediatric urology pdf the montreal.
Ozone depletion greenhouse gases and climate change. Unfortunately, this gives them plenty of time to find their way to the ozone layer. 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. Inversion layer inversion meteorology, a layer within which an atmosphericproperty is inverted temperature inversion layers, also called thermal inversions or just inversion layers, are areas where the normal decrease in air temperature with increasing altitude is reversed and air above the ground is warmer than the air below it. Ozone depletion and global warming overview page 1 of 5 halocarbons are chemical compounds containing carbon, one or more halogens, and sometimes hydrogen. 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 layer depletion fueled by falling temperature in the stratosphere can be termed as yet another hazardous effect of global warming on the earth. Global warming potentials global warming potentials provide a simple rep resentation of the relative radiative forcing resulting from a unit mass emission of a greenhouse gas compared to a reference compound. Why global mean surface temperatures began to rise around 1970 after having been relatively constant since 1945. In other words, global warming can make ozone depletion much worse right when it is supposed to begin its recovery during the next centu ry. Ozone layer depletion causes, effects and solutions. When ozone is depleted, more ultravioletb is observed to reach earth, cooling the stratosphere, warming earth. The study was conducted with 50 middle school students in years 7 and 8. Global warming also l eads to ozone layer depletion. Some of the effects of air pollutants such as acid rain, global warming, and ozone layer depletion leading to increased uv penetration and health hazards are well recognized now 17. Global agreement addressing ozone depletion will also. One chlorine molecule from a cfc can destroy up to 100,000 ozone molecules. After a brief history of ozone depletion, section ii asks.
Ozone depletion and climate change are linked in a number. Global warming global warming also leads to ozone layer depletion. Ozone layer depletion is one of the most serious problems faced by our planet earth. Click download or read online button to get ozone depletion greenhouse gases and climate change book now. Some recent evidence indicates that global warming may alter the atmospheric. It was a forerunner and template for the much larger deception of global warming entirely due to human produced co2. Ozone depletion potential an overview sciencedirect topics. This stark divergence, plus new insight into the physics of sunlight, suggests that greenhouse gases are not causing global warming. Depletion of the ozone layer by manufactured chlorofluorocarbon gases and volcanic eruptions, however, provides a much more detailed and precise explanation for changes in climate observed since the industrial revolution and throughout geologic history. 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 2011, even though global cfcs were in decline, arctic ozone fell to a historic low level due to unusual weather that allowed for greater than usual chemical ozone destruction. Once they get there they destroy ozone molecules and cause the ozone layer to become depleted or thinner. The ozone molecule is comprised of three oxygen atoms covalently bonded. Global warming global warming surfacelevel ozone and other compounds. This site is like a library, use search box in the widget to get.
802 1119 1057 1557 258 1232 1421 29 754 299 364 276 1054 1297 962 1317 820 195 834 1528 51 1559 357 1101 69 29 83 451 1474 186 1328 1327 1057 364 149 1314 735 280 1391 1054 1434 449 1274 763 1260 1171 140