Antarctic ozone hole

Antarctic ozone hole

[ant¦ärt·ik ′ō‚zōn ‚hōl]
(meteorology)
In the spring, the depletion of stratospheric ozone over the Antarctic region, typically south of 55° latitude, the formation of the hole is explained by the activation of chlorine and the catalytic destruction of O3, it occurs during September, when the polar regions are sunlit but the air is still cold and isolated from midlatitude air by a strong polar vortex. Also known as ozone hole.
References in periodicals archive ?
The research is part of a long-term monitoring program to see how atmospheric changes from global warming at the surface may affect the Antarctic ozone hole.
"If emissions do not decline, it will delay the recovery of the Antarctic ozone hole, possibly for decades," said Paul Fraser, an honorary fellow the CSIRO Climate Science Centre in Australia.
The year 2017 was also distinguished by the second smallest Antarctic ozone hole observed since 1988.
Two years after the discovery of the Antarctic ozone hole in 1985, nations of the world signed the Montreal Protocol on Substances that Deplete the Ozone Layer, which regulated ozone-depleting compounds.
"The Antarctic ozone hole was exceptionally weak this year," said Paul A.
Over the past three decades, hot topics including both the severity of Antarctic ozone depletion and the size of the Antarctic ozone hole have attracted more and more attention.
And while there has been a decline in ozone-depleting substances, "the 2015 Antarctic ozone hole was near-record in terms of size and persistence."
Since 2000, the average size of the Antarctic ozone hole in September has shrunk by about 4.5 million square kilometers, an area larger than India, researchers report online June 30 in Science.
The eight papers describe the cause of the Antarctic ozone hole, trends in local air quality, the distribution and behavior of persistent organic pollutants around the globe, and the transformation of waste management into resource management.
WASHINGTON (CyHAN)- The 2015 Antarctic ozone hole area was larger and formed later than in recent years, said scientists from NASA and the National Oceanic and Atmospheric Administration (NOAA).
The Suomi NPP OMPS delivered its first ozone measurements of the Antarctic ozone hole in October 2012, continuing a satellite record dating from the early 1970s.
Other projects on this list Nasa chronicles Dubai's progress include Antarctic Ozone Hole, Drought in Australia, Shrinking Aral Sea among several others.

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