Gwp is defined as the ratio of the radiative forcing for a given mass emission of a substance. Ozone layer depletion is one of the major problems for the atmosphere and also for all the living beings including the flora and fauna of this earth. For future research on the effects of uv radiation on phytoplankton, it is. Most ozone is found in the stratosphere upper part of the atmosphere, more than 10 to 16 kms from the surface of the earth. Apr 18, 2019 the ozone layer helps to protect life from harmful ultraviolet radiation. The depletion of the ozone describes two closely related but distinct phenomena which have been repeatedly observed since the latter 1970s. Ozone depletion definition of ozone depletion by the free. This timeline highlights the average area of the ozone hole between september 7th and october th as observed by nasa spacedbased instruments see colored bars and scale. 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. Health and environmental effects of ozone layer depletion.
Depletion of stratospheric ozone o3, as commonly known as the hole in the ozone layer, is an issue of international concern. Ozone depletion consists of two related events observed since the late 1970s. Ozone is effectiv in absorbing certin types of ultraviolet radiation from the sun. Ozone definition and meaning collins english dictionary. Ozone depletion potential an overview sciencedirect topics. Ozone layer depletion definition, causes, solutions toppr. Ozone layer and causes, effects and solutions to ozone depletion. All of the assessment documents core assessment report, executive summary, and twenty questions and answers about the ozone layer. Causes of ozone layer depletion and its effects on human.
Odp measures the relative impact on ozone depletion per tonne of gas. Ozone depletion occurs when the natural balance between the production and destruction of stratospheric ozone is tipped in favour of destruction. A large area of the ozone layer over antarctica that annually becomes depleted of ozone by the action of chlorofluorocarbons and other pollutants. 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. The thinning is most pronounced in the polar regions, especially over antarctica. The level from which it extends outward varies with latitude. The sun propagates ultraviolet radiations which as an adverse effect on living beings.
Ozone layer depletion is simply the wearing out reduction of the amount of ozone in the stratosphere. This layer absorbs the radiations and prohibits them from entering the outer surface of the earth. Ozone layer depletion is one of the major environmental issues which is getting thinner day by day as a result of increasing pollution. It is formed by the reaction of various air pollutants in the presence of sunlight. Ozone, a form of oxygen consisting of three atoms of oxygen instead of two, is considered an air pollutant when found at ground levels and is a major component of smog. An odp of 10, for example, is ten times as effective in depleting ozone per tonne, than an. Ozone o3 is a molecule made up of three atoms of oxygen o, and is mostly. Mar 12, 2019 ozone layer depletion is the destruction of ozone gas of upper atmospheric layer stratosphere, caused by substances formed from breakdown of ozone depleting substances ods. Ozone depletion synonyms, ozone depletion pronunciation, ozone depletion translation, english dictionary definition of ozone depletion.
Information and translations of ozone depletion in the most comprehensive dictionary definitions resource on the web. Researchers indicate that many of the effects of ozone depletion on human health tend to apply for animals, too. Powerpoint is the worlds most popular presentation software which can let you create professional depletion of ozone layer powerpoint presentation easily and in no time. Ozone depletion also explains much of the observed reduction in stratospheric and upper tropospheric temperatures. The natural distribution of ozone around the earth is. This helps you give your presentation on depletion of ozone layer in a conference, a school lecture, a business proposal, in a webinar and business and professional. Ozone depletion definition and meaning collins english. Downloads scientific assessment of ozone depletion 2018. Ozone gas is perceptibly blue in colour and has a characteristic pungent smell. Ozone layer depletion cause, effects, and solutions. In addition to the emergence of stratospheric ozone depletion as an international political issue, three other factors are. Ozone is harmful at ground level but high up the atmosphere ozone layer plays a vital role in the protection of all living beings. Sometimes this means creating an image that looks much like an aerial photo of the. Ozone absorbs a band of ultraviolet radiation called uvb.
Find out what caused the ozone hole, and how the 1989 montreal protocol sought to put an end to ozone depletion. Although natural phenomena can cause temporary ozone loss, chlorine and bromine released from manmade compounds such as cfcs are now accepted as the main cause of this depletion. This, in turn means higher co2 levels and stronger stratospheric cooling, and so on. Ozone depletion facts and information national geographic.
Feb 25, 2016 causes of ozone depletion the ozone hole is caused by chemicals called cfcs, short for chlorofluorocarbons. The severe depletion of the ozone layer in any particular area is called ozone hole. There are important effects of changes in the intensity of solar uv radiation resulting from stratospheric ozone depletion, particularly uvb. Basic knowledge of ozone layer depletion definition. Learn what cfcs are, how they have contributed to the ozone hole, and how the 1989 montreal. This study was conducted at university of gujrat during 20142015 as a term paper for master of philosophy. Apr 11, 2020 the thinning or reduction of ozone depletion is most prominent in the polar regions, especially over antarctica.
Ozone o3 is present in 1 ppm in the upper stratosphere, and it absorbs virtually all of the uv radiation from the sun. Natural cycle of ozone depletion in the stratosphere. Ozone layer depletion definition, examples, diagrams. These gases are carried to the stratosphere layer of atmosphere where ultraviolet radiations from the sun break them to release chlorine from cfcs and bromine from methyl bromide and halons. Cfcs escape into the atmosphere from refrigeration and propellant devices and processes, and they are so stable they last for decades. Oct 27, 2017 the effects of ozone depletion on plants and animals. In addition to the emergence of stratospheric ozone depletion as an international political issue, three other factors.
Unlike pollution, which has many types and causes, ozone depletion has been pinned down to one major human activity. 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 layer plays an ultimately significant role in absorbing ultraviolet radiation that are hazardous to living creatures on the earth. Dec 28, 2016 the ozone layer protects the earth against most uvb coming from the sun. However, these precautions will become more important as ozone depletion worsens. Update on ozonedepleting substances odss and other gases of. Industries that manufacture things like insulating foams, solvents, soaps, cooling things like air conditioners.
Ppt ozone layer depletion authorstream presentation. It is always important to protect oneself against uvb, even in the absence of ozone depletion, by wearing hats, sunglasses, and sunscreen. If interested, you can purchase this powerpoint from my online store. Scientific assessment of ozone depletion montreal protocol. Massive amounts of uvb radiation that penetrate our atmosphere do not only affect humans, but also animals and plants. One of the main reasons for the widespread concern about depletion of the ozone layer is the anticipated increase in the amounts of.
Ozone depletion vocabulary english flashcards quizlet. Stratospheric ozone depletion, ultraviolet radiation and health. Mar 21, 2020 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. The exposure to these radiations is severely affecting all life forms on earth, especially the humans. The chlorofluorocarbon and the halons are potent ozone depletors. Let us have a detailed look at the various causes and effects of ozone layer depletion. The emission of ozone depleting substance account for roughly 90% of total depletion of ozone layer in stratosphere. Ozone in the stratospherea layer of the atmosphere between 15 and 50. Pdf causes of ozone layer depletion and its effects on. 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. Nearly 90% of earths ozone is in the stratosphere and referred to as the ozone layer. The concept of ozone depletion potential odp is widely used wuebbles et al.
Jul 02, 2015 this quick video discusses the role of the ozone layer and how cfcs can cause ozone depletion. Feb 12, 2018 far above earths surface, the ozone layer helps to protect life from harmful ultraviolet radiation. Project report on ozone depletion environmental pollution. Ozone depleting definition of ozone depleting by medical. 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. Destruction of the upper atmospheric layer of ozone gas, caused by substances formed from breakdown of ozone depleting substances. Ozone layer depletion article about ozone layer depletion. Depletion of ozone definition of depletion of ozone by. Generally, we find thinning or depletion of the ozone layer to the extent of ozone hole creation over the southern pole i. Normal ozone ozone layer depletion and its effects. It covers the entire planet and protects life on earth by absorbing harmful ultravioletb uvb radiation from the sun.
Ozone is a colourless gas which is a form of oxygen. The global warming potential gwp is a metric for determining the relative contribution of a substance to climate warming. The depletion of ozone over the antarctic is also having an. Ozone depletion is allowing the uv radiation to earth surface. By the usual definition, stratospheric ozone depletion is not an integral part of the process of global climate change. Ozone layer depletion means the thinning of the ozone layer present in the upper atmosphere. Ozone depletion definition ozone depletion is the term commonly used to describe the thinning of the ozone layer in the stratosphere. This long life allows some cfcs to eventually reach the stratosphere.