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. Pdf ozone in the stratosphere is constantly being produced and. However, the ozone layer is destroyed by manmade chemicals known as ozonedepleting substances ods. The ozone layer is found in the stratosphere, which is the layer of the atmosphere immediately above the troposphere. The latter phenomenon is referred to as the ozone hole. What is the ozone layer and how does it affect you. The concentration of ozone in the ozone layer is usually under 10 parts ozone per million 5. The concept of ozone depletion potential odp is widely used wuebbles et al. No, ozone depletion itself is not the principal cause of climate change.
The ozone layer is a layer in earths atmosphere which contains relatively high concentrations of ozone o3. Is depletion of the ozone layer the principal cause. Mar 31, 2020 on wednesday, a research paper released in science daily showed that the ozone layer has started recovery due to changing wind patterns. Ozone is harmful at ground level but high up the atmosphere ozone layer plays a vital role in the protection of all living beings. Ozone layer damage is more like a really thin patch than a hole. The concept of ozoneforming potential and its quantification in any given airshed, it is common to find hundreds of different voc species, each with its own unique chemistry. The concept of ozone forming potential and its quantification in any given airshed, it is common to find hundreds of different voc species, each with its own unique chemistry.
Most ozone resides in the stratospheric ozone layer and a small percentage. Ozone depletion occurs when the natural balance between the production and destruction of ozone in the stratosphere is tipped in favour of destruction. The ozone hole is defined geographically as the area where in the total. Ozone layer definition is an atmospheric layer at heights of about 20 to 30 miles 32 to 48 kilometers that is normally characterized by high ozone content which blocks most solar ultraviolet radiation from entry into the lower atmosphere. Ozone in the stratospherea layer of the atmosphere between 15 and 50. Ozone is naturally produced through certain types of chemical reactions. The ozone layer is expected to return to normal levels by about 2050.
Life on earth has been protected for thousands of years with a vital layer of poison in the atmosphere. The ozone layer refers to a region of earths stratosphere that absorbs most of the suns uv radiation. Temperatures in the troposphere decrease with altitude. As a result the total amount of ozone remains constant. In this lesson, you will learn the importance of the ozone layer and how it is depleted. This layer serves as a shield that protects the earth from harmful ultraviolet radiation from the sun. Causes of ozone layer depletion and its effects on human.
The carbon in fossil fuels was in the atmosphere long ago. This layer absorbs the radiations and prohibits them from entering the outer surface of the earth. Worksheets are activity pack for key stages 2 3, national aeronautics and the ozone hole space administratio n, name date class, note in the information box at the bottom of the screen, airnow teacher toolkit for teachers, chapter 15 reinforcement work earths amazing atmosphere, atmosphere, cross curricular. During the long winter months of darkness over the antarctic, atmospheric temperatures drop. Childrens models of the ozone layer and ozone depletion article pdf available in research in science education 264. Indias integrated approach to protect the ozone layer.
The ozone layer in the stratosphere protects living things by absorbing harmful ultraviolet radiation. The tropospheres ozone layer protects organisms from the suns harmful rays. Low temperatures, increase in the level of chlorine and bromine gases in the upper stratosphere are some of the reasons that leads to ozone layer depletion. The function of the ozone layer is to shield the earth from the harmful ultraviolet rays of the sun and to keep the earth warm. Displaying all worksheets related to ozone layer class 5. In 1985, an extreme depletion of ozone over antarctica was discoveredthe socalled antarctic ozone hole. Principally, an ozone molecule is nothing but an oxygen molecule that has received an extra oxygen atom by electric high voltage. The sun propagates ultraviolet radiations which as an adverse effect on living beings. Pdf childrens models of the ozone layer and ozone depletion. But, it is very important that the world comply with the montreal protocol. Project report on ozone depletion environmental pollution. At ground level, ozone is a pollutant, but at higher altitudes it benefits life. The hole is one of the meaning which we still will have to understand. The ozone layer is composed of ozone, a molecule made up of three oxygen atoms bonded together.
Ozone layer, region of the upper atmosphere, between roughly 15 and 35 km 9 and 22 miles above earths surface, containing relatively high concentrations of ozone molecules. Why the ozone layer is vital to life on earth the ozone layer is a protective shield that blocks the suns harmful ultraviolet rays from reaching the earths surface. In the simplest approach to ozone mitigation based on voc controls, emission reductions are implemented on a mass basis without any regard to the unique chemistry of each. The ozone layer or ozone shield is a region of earths stratosphere that absorbs most of the suns ultraviolet radiation. Find, read and cite all the research you need on researchgate.
Worksheets are activity pack for key stages 2 3, national aeronautics and the ozone hole space administratio n, name date class, note in the information box at the bottom of the screen, airnow teacher toolkit for teachers, chapter 15 reinforcement work earths amazing atmosphere, atmosphere, cross. Latitude strongly influences climate because solar energy falls on areas that are closer to the equator than to the poles. Every year, since at least 1978, there is a sudden, rapid decrease in the stratospheric ozone levels at the end of the antarctic winter. These individual atoms then join up with o 2 molecules and make o 3, or ozone. The most commonly known example is the ozone layer, in which ozone is produced by ultra violet rays uv, which derive from the sun. By the usual definition, stratospheric ozone depletion is not an integral part. This site is like a library, use search box in the widget to get ebook that you want.
Timeline of stratospheric ozone depletion and observations. It covers the entire planet and protects life on earth by absorbing harmful ultravioletb uvb radiation from the sun. Stratospheric ozone depletion, ultraviolet radiation and health. The ozone hole is not really a hole but a thinning of the ozone layer over the south polar region. Ozone depletion consists of two related events observed since the late 1970s. 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.
The maps were produced with data collected by statellite istruments, including the ozone monitoring instrument on the aura satellite. It forms a protective layer that absorbs harmful ultraviolet light from the sun. The mesosphere and thermosphere protect earth from meteorites. The thinning is most pronounced in the polar regions, especially over antarctica. The reaction of ozone with various chemicals, gases, and even some lubricating oils causes a faint luminescence that can be detected by a sensitive. On wednesday, a research paper released in science daily showed that the ozone layer has started recovery due to changing wind patterns. The first report of depletion in o 3 layer came out in the 1980s by an atmospheric scientist in antarctica. Key concept human activities affect the atmosphere.
Causes, effects and solutions of ozone layer depletion. We cant make enough ozone to replace whats been destroyed, but provided that we stop producing ozonedepleting substances, natural ozone production reactions should return the ozone layer to normal levels by about 2050. Ozone layer is also naturally broken down but there is a balance between its formation and natural depletion. Ozone layer introduction the ozone layer refers to the ozone within stratosphere, where over 90% of the earths ozone resides. Frequently asked questions about the ozone layer ozone. Ozone layer and the formation of the ozone hole aa. Find out what caused the ozone hole, and how the 1989 montreal. The ozone layer helps to protect life from harmful ultraviolet radiation. Acid rain and ozone layer depletion download ebook pdf. Approximately 90 percent of the atmospheres ozone occurs from 1018 km 611 miles to about 50 km about 30 miles above earths surface.
The concept of ozoneforming potential and its quantification. You will also study the research and policy that has been. Ozone depletion definition ozone depletion is the term commonly used to describe the thinning of the ozone layer in the stratosphere. Ozone layer depletion causes, effects and solutions 7. One chlorine molecule from a cfc can destroy up to 100,000 ozone molecules. Indias integrated approach to protect the ozone layer introduction one of the most important environmental concerns the world faces today is of depletion of the ozone layer in the stratosphere. And also it means that when you see a bullet, flying to you,then it is already late to run away. This layer absorbs 9799% of the suns high frequency ultraviolet light, which is potentially damaging to life on earth. The concern is because of the fact that the ozone layer plays a protective role, screening the earth from harmful ultraviolet radiations. Ozone is an irritating, corrosive, colorless gas with a smell something like burning electrical wiring. This, in turn, will lead to the breakdown of ozone. Ozone is formed when the sunlight hits oxygen molecules o 2 and breaks them up into individual atoms.
Ozone holes are popular names for areas of damage to the ozone layer. Ozone is a gas made up of molecules that are formed by three oxygen atoms. This study was conducted at university of gujrat during 20142015 as a term paper for master of philosophy. A resource that can be produced or replaced by a healthy ecosystem is an renewable. National aeronautics and the ozone hole space administratio n. Ozone is created in the stratosphere when uv radiation from the sun strikes molecules of oxygen o2 and causes the two oxygen atoms to split apart. Ozone depletion theory, on the other hand, gives a very direct explanation for why temperatures did not change much from 1998 through 20 when ozone depletion was not increasing and then began to rise rapidly again in 2014 and for why ocean heat content continues to rise, because the ozone layer remains depleted. 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.
The ozone layer was discovered in 19 by the french physicists. The ozone layer is not really a layer at all, but has become known as such because most ozone particles are scattered between 19 and 30 kilometers 12 to 30 miles up in the earths atmosphere, in a region called the stratosphere. Is depletion of the ozone layer the principal cause of climate change. The ozone layer is a deep blanket in the stratosphere made up of comparatively high concentration of the ozone. Policylegislation on fgases and alternatives two environmental frameworks one goal the montreal protocol and the kyoto protocol. Volkmar hasse, gtz proklima, germany preface volkmar hasse, gtz proklima i. Protecting the ozone layer department of the environment. In the 1970s, people all over the world started realizing that the ozone layer was getting thinner and that this was a bad thing. Cfc molecules are highly stable and can last for up to 100 years. Ozone depletion and climate change the climate system involves the atmosphere specifically processes within the troposphere, such as air circulation patterns land surfaces and oceans. On each line, write the term from the word bank that correctly completes each sentence. Destruction of the upper atmospheric layer of ozone gas, caused by substances formed from breakdown of ozone depleting substances. Air pressure decreases with height in the atmosphere.
The word ozone means smelly in greek because the gas has a strong odor. However, because ozone absorbs solar radiation and is a greenhouse gas, ozone changes and climate change are. Concept map a concept map can help you organize information and show you how ideas are connected. As a result of its chemical composition, ozone is regarded as a special type of oxygen as it contains three oxygen molecules o3 as opposed to the usual two oxygen molecules o2.
It contains high concentrations of ozone o3 relative to other parts of the atmosphere. Pdf causes of ozone layer depletion and its effects on. Click download or read online button to get acid rain and ozone layer depletion book now. 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. Unfortunately, this gives them plenty of time to find their way to the ozone layer. Basic knowledge of ozone layer depletion definition. Antara banerjee and her colleagues at the university of colorado boulder did the research and noted that the ozone layer in the northern hemisphere is on track to fully recover to its 1980s levels sometime in the 2030s. Hence, cfcs are transporting agents that are responsible for damaging the ozone layer. The ozone layer contains less than 10 parts per million of ozone, while the average ozone concentration in. Key concept how do air pressure and temperature change as altitude increases. The ozone layer is mainly found in the lower portion of the stratosphere.
The thermosphere is the atmospheric layer farthest. As you read the lesson, place the terms in the correct location in the concept maps. Ozone layer the ozone layer is basically naturally occurring gas in the region of stratosphere where ozone particles are accumulated 2. Interaction between climate system and ozone layer. Ozone depletion potential an overview sciencedirect topics. The main things that lead to destruction of the ozone gas in the ozone layer. Natural refrigerants sustainable ozone and climatefriendly alternatives to hcfcs introduction dr. The ozone hole is shown in purple above the antarctic on sept.