ozone layer explained

The stratosphere gets its name because it is stratified, or layered: as elevation increases, the stratosphere gets warmer. Hilary Costa Our editors will review what you’ve submitted and determine whether to revise the article. Privacy Notice |  molecule (O. Erin Sprout Diane Boudreau Most of the remaining ozone occurs in the troposphere, the layer of the atmosphere that extends from Earth’s surface up to the stratosphere. Many governments and businesses agreed that some chemicals, like aerosol cans, should be outlawed. This radiation is dangerous to living organisms on Earth. One of the main components of Earth’s interdependent physical systems is the atmosphere. ". Tim Gunther, Jeannie Evers, Emdash Editing The ozone layer acts as a shield for life on Earth.Ozone is good at trapping a type of radiation called ultraviolet radiation, or UV light, which can penetrate organisms’ protective layers, like skin, damaging DNA molecules in plants and animals. This layer absorbs between 93 and 99 per cent of the ultraviolet radiation from the sun. Over the course of several decades, however, human activities substantially altered the ozone layer. The stratosphere includes the zone termed the ‘ozone layer’.Ozone in the stratosphere plays a very different role to that in the layer below. Compliance with international treaties that phased out the production and delivery of many ozone-depleting chemicals, combined with upper stratospheric cooling due to increased carbon dioxide, is thought to have contributed to the shrinking of the ozone holes over the poles and to slightly higher stratospheric ozone levels overall. She or he will best know the preferred format. After some study, atmospheric scientists recognized that this ozone depl e tion was a result of air pollutants from human activities — specifically, the release of nontoxic, aerosol gas molecules called chlorofluorocarbons. The ozone layer is one layer of the stratosphere, the second layer of the Earth’s atmosphere. Harry E. Preble Professor of Atmospheric Sciences, Department of Atmospheric Sciences, University of Illinois, Urbana, Illinois. Learn what CFCs are, how they have contributed to the ozone hole, and how the 1989 Montreal Protocol sought to put an end to ozone depletion. The atmosphere protects life on earth by shielding it from incoming ultraviolet (UV) radiation, keeping the planet warm through insulation, and preventing extremes between day and night temperatures. If you have questions about licensing content on this page, please contact ngimagecollection@natgeo.com for more information and to obtain a license. Sunlight causes nitric oxide to react chemically with ozone (O, …absorber of solar radiation is ozone, which forms by a photochemical process at heights of 10–50 km (6–30 miles) and filters out most of the radiation below 0.3 micrometre. But it does a very important job. The ozone layer effectively blocks almost all solar radiation of wavelengths less than 290 nanometres from reaching Earth’s surface, including certain types of ultraviolet (UV) and other forms of radiation that could injure or kill most living things. They are distinguished by a unique atomic number. Tara Ramroop The ozone layer is important because it filters harmful ultraviolet radiation as it travels from the sun to the surface of the Earth. Million to OneCompared to other gases in the atmosphere, ozone is pretty rare. The largest such hole—which has spanned more than 20.7 million square km (8 million square miles) on a consistent basis since 1992—appears annually over Antarctica between September and November. A secondary absorber in the infrared range is carbon…. Ozone is a molecule that contains three oxygen atoms. The stratosphere is the mass of protective gases clinging to our planet. Updates? Black Friday Sale! Depletion is so extensive that so-called ozone holes (regions of severely reduced ozone coverage) form over the poles during the onset of their respective spring seasons. dangerous and sometimes fatal skin cancer. Melissa McDaniel chemical element with the symbol O, whose gas form is 21% of the Earth's atmosphere. However, some scientists noted that gains in stratospheric ozone levels have only occurred in the upper stratosphere, with declines in ozone concentrations in the lower stratosphere outpacing increases in the upper stratosphere. layer in the atmosphere containing the gas ozone, which absorbs most of the sun's ultraviolet radiation. It is one of the primary ingredients in photochemical smog, a phenomenon that plagues many urban and suburban areas around the world, especially during the summer months. Text on this page is printable and can be used according to our Terms of Service. Water is an example of a compound, a mixture of two or more elements, and is created when two hydrogen atoms bond to an oxygen atom. The concern over exposure to biologically harmful levels of UV radiation has been the main driver of the creation of international treaties such as the Montreal Protocol on Substances That Deplete the Ozone Layer and its amendments, designed to protect Earth’s ozone layer.

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