Ozone Hole definitions

Ozone hole

1) Atmospheric problem 2) High-level opening 3) Montreal Protocol concern 4) Opening for an EPA worker 5) Source of harmful radiation
Found on https://www.crosswordclues.com/clue/ozone-hole

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Ozone hole

The ozone hole is an annual thinning of the ozone layer over Antarctica, caused by stratospheric chlorine. Other more moderate thinnings have also been called `ozone holes`, such as the one over the North Pole during certain weather conditions. The discovery of the annual depletion of ozone above the Antarctic was first announced in a paper by J.....
Found on http://en.wikipedia.org/wiki/Ozone_hole

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Ozone Hole

A thinning of the ozone layer over Antarctica, which occurs each spring.
Found on http://www.encyclo.co.uk/local/22268

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Ozone Hole

A thinning of the ozone layer over Antarctica and beyond which occurs each spring.
Found on http://www.metcheck.com/OTHER/glossary.asp

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Ozone Hole

Is a sharp seasonal decrease in stratospheric ozone concentration that occurs over Antarctica in the spring. First detected in the late 1970s, the ozone hole continues to appear as a result of complex chemical reaction in the atmosphere that involves CFCs.
Found on http://www.physicalgeography.net/physgeoglos/o.html

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Ozone hole

A thinning of the ozone layer over Antarctica, which occurs each spring.
Found on http://www.timeanddate.com/weather/glossary.html

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ozone hole

[n] - an area of the ozone layer (near the poles) that is seasonally depleted of ozone
Found on http://www.webdictionary.co.uk/definition.php?query=ozone%20hole

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Ozone Hole

A thinning break in the stratospheric ozone layer. Designation of amount of such depletion as an 'ozone hole' is made when the detected amount of depletion exceeds fifty percent. Seasonal ozone holes have been observed over both the Antarctic and Arctic regions, part of Canada, and the extreme northeastern United States.
Found on https://www.encyclo.co.uk/local/20094

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Ozone hole

A popular name given to a phenomenon discovered in 1987, when scientists measured unexpectedly low ozone concentrations in the stratosphere above the South Pole during the Antarctic spring. It is now generally accepted that the loss of stratospheric ozone is caused by chemical reactions initiated by chlorofluorocarbons.
Found on https://www.encyclo.co.uk/local/20855

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ozone hole

noun an area of the ozone layer (near the poles) that is seasonally depleted of ozone
Found on https://www.encyclo.co.uk/local/20974

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Ozone Hole

A severe depletion of stratospheric ozone over Antarctica that occurs each spring. The possibility exists that a hole could form over the Arctic as well. The depletion is caused by a chemical reaction involving ozone and chlorine, primarily from human produced sources, cloud particles, and low temperatures.
Found on https://www.encyclo.co.uk/local/21182

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ozone hole

Decrease of ozone in the stratosphere.
Found on https://www.encyclo.co.uk/local/22327

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ozone hole

any part of the ozone layer that has become depleted by atmospheric pollution, resulting in excess ultraviolet radiation passing through the atmosphere.
Found on https://www.infoplease.com/dictionary/ozone-hole

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