Peak levels of ozonedepleting compounds are expected at stratospheric altitudes in the late 1990s. This thesis examines global warming and the possible contribution that. All of the ozone depleting substances controlled by. How is global warming related to ozone layer depletion. There are also springtime polar tropospheric ozone depletion. Protecting the ozone layer and reducing global warming undp. The effects of ozone depletion and volcanic aerosols on climate. Yes, with all things being equal, more co2 does add a very small amount of warming, but very little. The ozonedepletion theory of global warming provides, for the first time, a clear, straightforward explanation for observations not easily explained by. 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. 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. Importance of the ozone layer, effects of ultraviolet light on humans, location of ozone in atmosphere, graphing ozone concentra. Ozone depletion and global warming are related concepts but certainly not the same. It is also one of the prime reasons which are leading to global warming.
Climate change, global warming, and ozone loss iitk. Climate is the average weather at a given point and time of year, over a long period typically 30 years. The ozone hole is an area in the stratosphere above antarctica. Ozone depletion begins, and the ozone hole appears. Many of them can persist in the stratosphere for centuries. As much as global warming is quite different from ozone depletion, it is global warming that actually encourages ozone depletion. Ppt ozone layer depletion powerpoint presentation free. Manmade global warming is the largest scientific fraud ever, based on a single grain of fact out of a beach full of sand. Ozone depletion and global warming linkedin slideshare.
Instead of looking back at the successful cfc phaseout, the u. Addressing ozone layer depletion as part of the united states commitment to implementing the montreal protocol on substances that deplete the ozone layer, congress amended the clean air act to add provisions under title vi for protecting the ozone layer ozone layer the region of the stratosphere containing the bulk of atmospheric ozone. Back in the 1980s, when the hole in the ozone layer was the worlds numberone environmental. Ozone depletion facts and information national geographic.
These are two environmental conditions which are faced by the world today. Ozone depletion, greenhouse gases, and climate change. The word ozone means smelly in greek because the gas has a strong odor. One chlorine molecule from a cfc can destroy up to 100,000 ozone molecules. Ozone layer depletion causes, effects and solutions 7.
The use of cfcs not only destroys the ozone layer but also leads to 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. Ozone depletion consists of two related events observed since the late 1970s. These changes result in a warming of the troposphere and a cooling of the stratosphere. What layer of the atmosphere contains the bulk of the ozone. Ozone layer depletion is one of the most serious problems faced by our planet earth. Publications about the ozone depletion theory of global. So, it is fair to say that dealing with ozone depletion was a start to dealing with global warming. Ozone depletion may also make it harder to combat global warming, because more uv light penetrates the worlds oceans and destroys plankton. Ozone depletion reasons, impacts, prevention by reshma. The concept that stratospheric cooling due to ozone loss may lead to a delay in. The ozone layer helps to protect life from harmful ultraviolet radiation.
Understanding that global warming is caused by ozone depletion, not greenhouse gases, has major implications for investments in energy. When there is less ozone, more of this highenergy ultraviolet radiation is observed to reach earths surface, warming the earth instead of the ozone layer. Far above earths surface, the ozone layer helps to protect life from harmful ultraviolet radiation. 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. 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. Global warming is caused by ozone depletion not greenhouse gases duration. Most of global warming is being caused by increasing concentrations of greenhouse gases produced by human activities. But through domestic and international action, the ozone layer is healing and should fully recover by about 2065. Global warming and ozone layer depletion are two different problems see the. This worksheet has earth science regents questions about the ozone layer and ozone depletion. 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.
Stratospheric cooling is a key factor in the development of ozone holes over the poles. Environmental effects and interactions of stratospheric ozone. Both of them are dependent on each other and make a very good viscous circle of destruction even though global warming is characterized. Hfcs increase global warming, and global warming introduces a threat to the ozone layer oh, this just gets better and better. The ozone hole and global warming are not the same thing, and neither is the main cause of the other.
Ozone depletion and global warming an integrated approach. Difference between ozone depletion and global warming. Climate change is the greatest threat facing our planet today. 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. 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.
Chapter ozone depletion potentials, global warming. Ozone layer depletion cause, effects, and solutions. Addressing ozone layer depletion ozone layer protection. Unfortunately, this gives them plenty of time to find their way to the ozone layer. Ozone depleting substances are the substances such as chlorofluorocarbons, halons, carbon tetrachloride, hydrofluorocarbons, etc. This website addresses stratospheric ozone issues, including the science of ozone depletion, epas regulatory approach to protecting the ozone layer, epa.
The layer of ozone gas is what which protects us from the harmful ultraviolet radiations of the sun. The gases that are released contain chlorine and bromine. Find out what caused the ozone hole, and how the 1989 montreal protocol sought to put an end to ozone depletion. However, many ozone depleting chemicals are potent greenhouse gases. No one knows for certain how much more ozone depletion will occur. Are those holes in the ozone layer the main factor responsible for global warming.
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. Ozone depletion is when the constant release of manmade gases such as factories and car exhaust cause holes in the ozone layer. Ozone layer depletion fueled by falling temperature in the stratosphere can be termed as yet another hazardous effect of global warming on the earth. Evs global warming, ozone depletion ppt ozone depletion. Ozone absorbs ultraviolet radiation from the sun, warming the ozone layer 20 to 30 km above earths surface. Global warming also l eads to ozone layer depletion. As the ozone layer has been declining in recent decades, that may be causing global warming. If there are holes, then ultraviolet rays from the sun will pass through, which is dangerous for people and animals. Winner of the standing ovation award for best powerpoint templates from presentations magazine. The entire story of ozone depletion due to chlorofluorocarbons cfc was just that, a story, a scientifically created deception. 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. 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. 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. Pdf ozone depletion, greenhouse gases, and climate change.
What connection is there between ozone thinning and global warming. Learn what cfcs are, how they have contributed to the ozone hole, and how the 1989 montreal. If i read this right, a measure introduced to solve one problem ozone depletion ie hfcs replacing cfcs has now come full circle. Understanding both these phenomena are important for the survival of life on. 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. In spring, temperatures begin to rise, the ice evaporates, and the ozone layer starts to recover. Considering the new scientific evidence showing the negative synergies between global climate change and ozone depletion, these twin crises should be playing a major role in the environmental positions of candidates in the 2000 campaigns. The ozone scare was a dry run for the global warming scare.
Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. It takes years for cfcs and other ozonedepleting compounds to reach the stratosphere. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. So if we make awareness among people we can sav e ozone layer from depletion, ecosystem imbalance, and o ther. Pdf causes of ozone layer depletion and its effects on. There is a substantial time lag between the time when ods emissions begin to decline and the point at which the ozone layer begins to recover. How well was that policy document crafted to incorporate the new. Following is the list of some of the main ozone depleting substances and the sources from where they are released. Global warming and ozone depletion flashcards quizlet. Multiple satellite measurements and groundbased observations have determined the ozone layer has stopped declining since 1995 yang 2005 while temperature trends continue upwards. Many people have asked me whether global warming and the ozone hole are related. What are some reasons why the world dealt with the issue. For example, students use colored transparency film and painted cans to learn.
The emission of ozone depleting substances has been damaging the ozone layer. Protection of the ozone layer was one of the hottest environmental issues during the 1992 presidential race. The 2018 edition of the 20 questions document is the fourth. Now, the evidence, much of which was known at the start but deliberately ignored, is emerging. It was a forerunner and template for the much larger deception of global warming entirely due to human produced co2. In 1987, a group of nations signed a document called the montreal protocol.
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 depletion being a direct result of global warming will also contribute to the increase of global warming as its depletion will lead to further damage of the system that should reduce global warming. Is global warming just a myth like the ozone layer depletion. Saving the ozone layer is warming the planet but it can be. Twenty questions and answers about the ozone layer noaaesrl. The ozone layer, found in the lower part of the stratosphere 9 to 20 miles up, prevents harmful ultraviolet radiation from reaching the earths surface. Global warming refers to an unequivocal and continuing rise in the average temperature of earths climate system. How large is the depletion of the global ozone layer. Ozone is a colourless gas which is found in the stratosphere of our upper atmosphere. The latter phenomenon is referred to as the ozone hole. Cfc molecules are highly stable and can last for up to 100 years. The 1989 montreal protocol successfully phased out cfc production and use.
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