ozone layer

noun

Definition of ozone layer

: 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

Examples of ozone layer in a Sentence

Recent Examples on the Web Huge hole in the ozone layer opens over the North Pole. Lorcan Roche Kelly, Bloomberg.com, "Five Things You Need to Know to Start Your Day," 18 May 2020 Up until 2000, the jet stream had been shifting from its course as a result of ozone layer depletion. Nusmila Lohani, The Christian Science Monitor, "Points of Progress: Ireland will ban certain tobacco products, and more," 10 Apr. 2020 Last week, new research declared the once-worrying fissure in the ozone layer at the South Pole to be largely vanquished. Alex Fox, Smithsonian Magazine, "Why This Rare, Huge Ozone Hole Over the Arctic Is Troubling Scientists," 1 Apr. 2020 In 1989, representatives from the 12 European Community nations agreed to ban all production of CFCs (chlorofluorocarbons), the synthetic compounds blamed for destroying the Earth’s ozone layer, by the end of the 20th century. BostonGlobe.com, "This day in history," 2 Mar. 2020 The ozone layer protects the Earth from harmful solar radiation, which would affect humans and all other life on the planet – the sympathetic cause. Eva Botkin-kowacki, The Christian Science Monitor, "So 1 million species are at risk of extinction. Now what?," 14 May 2019 The global treaty that protected the Earth's ozone layer did more than just maintain a crucial protective covering for our planet. Fox News, "Did closing the ozone hole help slow Arctic warming?," 24 Jan. 2020 Over the past 30 years humans have made progress in stopping damage to the ozone layer by curbing the use of certain chemicals. Mark Thiessen, National Geographic, "Ozone depletion, explained," 18 Apr. 2019 Several smaller nations have complained that the use of aircraft to inject aerosols into the atmosphere might alter the weather or destroy the ozone layer, which protects humans from some of the more harmful radiation from sunlight. John Fialka, Scientific American, "NOAA Gets Go-Ahead to Study Controversial Climate Plan B," 23 Jan. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ozone layer.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of ozone layer

1927, in the meaning defined above

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Time Traveler for ozone layer

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The first known use of ozone layer was in 1927

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Statistics for ozone layer

Last Updated

29 May 2020

Cite this Entry

“Ozone layer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ozone%20layer. Accessed 2 Jun. 2020.

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More Definitions for ozone layer

ozone layer

noun

English Language Learners Definition of ozone layer

: a layer of ozone in the upper atmosphere that prevents dangerous radiation from the Sun from reaching the surface of the Earth

ozone layer

noun

Kids Definition of ozone layer

: a layer of the earth's upper atmosphere that is characterized by high ozone content which blocks most of the sun's ultraviolet radiation from entering the lower atmosphere

More from Merriam-Webster on ozone layer

Britannica.com: Encyclopedia article about ozone layer

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