In a study organized by the The residual effects of CFCs accumulating within the atmosphere lead to a concentration gradient between the atmosphere and the ocean. Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!Learn a new word every day. Thanks! Jeannie Evers, Emdash Editing Find out what caused the ozone hole, and how the 1989 Montreal Protocol sought to put an end to ozone depletion. They are distinguished by a unique atomic number. UV radiation capable of penetrating nitrogen is divided into three categories, based on its wavelength; these are referred to as UV-A (400–315 nm), UV-B (315–280 nm), and UV-C (280–100 nm). The ozone layer is mainly found in the lower portion of the stratosphere, fro… All rights reserved.Encyclopedic entry. Add the power of Cambridge Dictionary to your website using our free search box widgets.Browse our dictionary apps today and ensure you are never again lost for words. The ozone layer contains less than 10 parts per million of ozone, while the average ozone concentration in Earth's atmosphere as a whole is about 0.3 parts per million.

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. An atmosphere is the layers of gases surrounding a planet or other celestial body.

0 && stateHdr.searchDesk ? There is a layer of ozone high above... | Meaning, pronunciation, translations and examples Learn more. While the total amount of ozone increases moving from the tropics to higher latitudes, the concentrations are greater in high northern latitudes than in high southern latitudes, due to the The ozone layer can be depleted by free radical catalysts, including The breakdown of ozone in the stratosphere results in reduced absorption of ultraviolet radiation. ozone layer. Ozone layer, also called ozonosphere, region of the upper atmosphere, between roughly 15 and 35 km (9 and 22 miles) above Earth’s surface, containing relatively high concentrations of ozone molecules (O 3 ).

Earth’s atmosphere is composed of about 78% nitrogen, 21% oxygen, and one percent other gases. Click on the arrows to change the translation direction.

For approximately 5 percent of the Earth's surface, around the north and south poles, much larger seasonal declines have been seen, and are described as "ozone holes".To support successful regulation attempts, the ozone case was communicated to lay persons "with easy-to-understand bridging metaphors derived from the popular culture" and related to "immediate risks with everyday relevance".On August 2, 2003, scientists announced that the global depletion of the ozone layer may be slowing down because of the international regulation of ozone-depleting substances. National Geographic HeadquartersNational Geographic Society is a 501 (c)(3) organization. The amount of ozone in the atmosphere is measured in "Dobson units."

Some CFCs have destructive effects on the ozone layer. Click on the arrows to change the translation direction. The ozone absorbs large amounts of solar ultraviolet radiation, preventing it from reaching the Earth's surface. It contains a high concentration of ozone(O3) in relation to other parts of the atmosphere, although still small in relation to other gases in the stratosphere. The ozone layer is one layer of the stratosphere, the second layer of the Earth’s atmosphere.The stratosphere is the mass of protective gases clinging to our planet. Teach your students about the Earth's atmosphere with the resources in this collection.Far above Earth's surface, the ozone layer helps to protect life from harmful ultraviolet radiation.

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They are distinguished by a unique atomic number. Most of the light from young hot stars is in the ultraviolet and so study of these wavelengths is important for studying the origins of galaxies. Ozone levels have dropped by a worldwide average of about 4 percent since the late 1970s. Ozone depletion consists of two related events observed since the late 1970s: a steady lowering of about four percent in the total amount of ozone in Earth's atmosphere (the ozone layer), and a much larger springtime decrease in stratospheric ozone around Earth's polar regions. Consequently, unabsorbed and dangerous ultraviolet radiation is able to reach the Earth's surface at a higher intensity. Tell us about this example sentence: The sentence contains offensive content. This radiation is dangerous to living organisms on Earth.. Over the … {{#verifyErrors}}





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