Why has an “ozone hole” appeared over Antarctic when ozone-depleting gases are present throughout the stratosphere?
Ozone-depleting gases are present throughout the stratospheric ozone layer because they are transported great distances by atmospheric air motions. The severe depletion of the Antarctic ozone layer known as the “ozone hole” forms because of the special weather conditions that exist there and nowhere else on the globe. The very cold temperatures of the Antarctic stratosphere create ice clouds called Polar Stratospheric Clouds (PSCs). Special reactions that occur on PSCs and the relative isolation of Polar stratospheric air allow chlorine and bromine reactions to produce the ozone hole in Antarctic springtime. Q.11. : How severe is the depletion of the Antarctic ozone layer? Severe depletion of the Antarctic ozone layer was first observed in the early 1980s. Antarctic ozone depletion is seasonal, occurring primarily in late winter and spring (August-November). Peak depletion occurs in October when ozone is often completely destroyed over a range of altitudes, reducing overhead total ozon
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- Why has an "ozone hole" appeared over Antarctica when ozone-depleting gases are present throughout the stratosphere?
- Why has an "ozone hole" appeared over Antarctic when ozone-depleting gases are present throughout the stratosphere?
