8/22/2018 · The ozone layer has depleted significantly due to certain industrial activities in the past century or so. Ozone depletion actually refers to two related events: a steady decrease of around 4% of the total amount of ozone in the atmosphere, and the severe depletion of stratospheric ozone in late winter and early spring in the Antarctic.
In 2019, abnormal weather patterns in the upper atmosphere over Antarctica dramatically limited ozone depletion, leading to the smallest hole since 1982. Models predict that the Antarctic ozone layer will mostly recover by 2040. References Carlowicz, M. (2009) The World We Avoided by Protecting the Ozone Layer . NASA’s Earth Observatory Website.
Antarctic ozone depletion is seasonal, occurring primarily in late winter and early spring (August–November). Peak depletion occurs in early October when ozone is often completely destroyed over a range of stratospheric altitudes, thereby reducing total ozone by as much as two-thirds at some locations. This severe depletion, The ozone hole was first detected over Antarctica when scientists compared the amount of ozone found in the early 1980s with measurements dating back to 1956. The ozone hole forms each year when there is a sharp decline (currently up to 60%) in the total ozone over most of Antarctica for a period of about two months during September and October.
The low ozone air over Antarctica mixes with the higher ozone air of the mid-latitudes. But, the ozone losses endured can have a lasting effect by lowering ozone levels across the Southern Hemisphere. Implications of Ozone Loss Above:Ultraviolet Radiation Exposure. NASA ’s Total Ozone Mapping Spectrometer (TOMS) provides measurements that enable scientists to accurately estimate how much .
9/20/2020 · September 20, 2020. Persistent cold temperatures and strong circumpolar winds supported the formation of a large and deep Antarctic ozone hole in 2020, and it is likely to persist into November, NOAA and NASA scientists reported.
Ozone Depletion, Ozone layer depletion has many negative effects including cancer risks . These wavelengths can harm plants and animals and also cause skin cancer, sunburn, and cataracts in humans.
Ozone depletion is largely a result of man-made substances . Humans have introduced gases and chemicals into the atmosphere that have rapidly depleted the ozone layer in the last century.
While temperatures consistently plummet in the South Pole each year, these conditions are rare in the North, making ozone depletion much less common .
