ozone layer
nounDefinition 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
In 1987 the Montreal protocol curbed CFC depletion of the ozone layer, and in 1991 the Antarctic protocol, which people thought unachievable, barred drilling there for 50 years. — The Economist, "Obituary: Steve Sawyer died on July 31st," 22 Aug. 2019 Supernova explosions could obliterate Earth’s ozone layer, for instance, which would wreak havoc on marine plankton and coral reefs. — Rebecca Boyle, WIRED, "Exploding Stars May Have Killed Off Prehistoric Predators," 20 Jan. 2019 Good news for the ozone layer was widely reported in November 2018: global efforts to phase out ozone-depleting substances had resulted in a slow but persistent recovery. — Cathleen O'grady, Ars Technica, "While ozone is recovering, we’re doing things to prolong the process," 30 July 2019 The federal Environmental Protection Agency will ban the manufacture of such refrigerants in 2020, in an effort to reduce depletion of the planet’s ozone layer. — Tad Vezner, Twin Cities, "Ramsey County diverting millions from parks projects to pay for new Vadnais Sports Center dome," 23 July 2019 Could experiments using aerosols to shield the Earth from the heat of solar radiation harm the ozone layer (Climatewire, June 18)? — John Fialka, Scientific American, "Risks of Controversial Geoengineering Approach “May Be Overstated”," 3 July 2019 Similarly, ground-level or tropospheric ozone (not to be confused with the protective stratospheric ozone layer higher up) is not emitted directly but emerges from complex reactions among pollutants in the air. — Christina Nunez, National Geographic, "Carbon dioxide levels are at a record high. Here's what you need to know.," 13 May 2019 Antarctic winds are growing in strength due to the thinning of the ozone layer and the build-up of greenhouse gases, but their impact on the ocean has never been factored in to climate models. — Rob Picheta, CNN, "Boaty McBoatface makes significant climate change discovery on first mission," 18 June 2019 The progressive thinning of the ozone layer has made the already hot summers increasingly steamy. — Samantha Lopez, Houston Chronicle, "Six charts show how Houston summers are getting hotter," 11 June 2019These 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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