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Ozone depletion - Wikipedia
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. The latter phenomenon is referred to as the ozone hole.There are also springtime polar tropospheric ozone depletion ...
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The Ozone Hole
The Ozone Hole. For nearly a billion years, ozone molecules in the atmosphere have protected life on Earth from the effects of ultraviolet rays.
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NASA Ozone Watch: Latest status of ozone
View the latest status of the ozone layer over the Antarctic, with a focus on the ozone hole. Satellite instruments monitor the ozone layer, and we use their data to create the images that depict the amount of ozone.
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What is an Ozone Hole and Causes and Effects of Ozone ...
Ozone hole is the area of the Earth's atmosphere where abnormal reductions of ozone occur, it is an annual phenomenon observed during the spring in the Polar Regions and is usually followed by a recovery during the summer.
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Nasa Ozone Watch: Ozone hole facts
Ozone hole facts. These reactions convert the inactive chlorine reservoir chemicals into more active forms, especially chlorine gas (Cl 2).When the sunlight returns to the South Pole in October, UV light rapidly breaks the bond between the two chlorine atoms, releasing free chlorine into the stratosphere, where it takes part in reactions that destroy ozone molecules while regenerating the ...
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The Ozone Hole
The Ozone Hole 2018. Antarctic Situation at 2019 January 28 British Antarctic Survey Ozone Bulletin. Antarctic ozone today: The 2018 ozone hole is over and the southern polar vortex has dissipated.
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The Ozone Hole: Closing the Gap - NASA
After thinning at alarming rates in the 1980s and 90s, the ozone layer over Antarctica is starting to recover. Watch how ozone concentrations in the stratosphere have changed from 1979 through 2018.
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2019 Ozone Hole is the Smallest on Record
The weather systems that disrupted the 2019 ozone hole are typically modest in September, but this year they were unusually strong. At an altitude of about 20 kilometers (12 miles), temperatures during September 2019 were 16 degrees Celsius (29 degrees Fahrenheit) warmer than average—the warmest in the 40-year historical record for September by a wide margin.
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2019 Ozone Hole is the Smallest on Record Since Its ...
Abnormal weather patterns in the upper atmosphere over Antarctica dramatically limited ozone depletion in September and October, resulting in the smallest ozone hole observed since 1982, NASA and NOAA scientists reported today.
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Ozone hole - definition of ozone hole by The Free Dictionary
ozone hole n. A large area of the ozone layer over Antarctica that annually becomes depleted of ozone by the action of chlorofluorocarbons and other pollutants. o′zone hole` n. any part of the ozone layer that has become depleted by atmospheric pollution, resulting in excess ultraviolet radiation passing through the atmosphere. [1985–90 ...
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