Where was the largest hole in the ozone found?
The 2020 Antarctic ozone hole grew rapidly from mid-August and peaked at around 24.8 million square kilometres on 20 September 2020, spreading over most of the Antarctic continent. It was the longest-lasting and one of the largest and deepest holes since the ozone layer monitoring began 40 years ago.
Where did a hole in the ozone layer appear?
South Pole
Certain human-made substances had reached the stratosphere and disrupted the ozone layer to the point of depletion, creating an extremely thin section commonly known as the ozone hole. The hole formed at the South Pole due to the region’s unique meteorological and chemical conditions.
When and where was ozone hole discovered?
Reductions of up to 70 percent in the ozone column observed in the austral (southern hemispheric) spring over Antarctica and first reported in 1985 (Farman et al.)
When was the ozone hole discovered?
1985
Researchers at the British Antarctic Survey discovered the ozone hole in 1985, and NASA’s satellite estimates of total column ozone from the Total Ozone Mapping Spectrometer confirmed the 1985 event, revealing the ozone hole’s continental scale.
Where was the ozone hole first discovered?
British Antarctic
In the scientific journal Nature on May 16, 1985, three scientists from the British Antarctic Survey announce their detection of abnormally low levels of ozone over the South Pole.
When was the ozone layer discovered?
Ozone was identified in the atmosphere by Schönbein in 1867 and soon corroborated by Andrews in 1868 (Rubin, 2001) using chemical means. Measurements of the solar spec- trum were later used to estimate the amount of ozone in the path between the sun and the ground.
How big was the ozone hole in 1985?
The maximum depth of the hole that year was 194 Dobson Units (DU)—not far below the previous historical low. For several years, the minimum concentrations stayed in the 190s, but then the minimums rapidly grew deeper: 173 DU in 1982, 154 in 1983, 124 in 1985.
Who found the hole in the ozone layer?
It was the Nature paper by Joe Farman, Brian Gardiner and Jonathan Shanklin, however, which specifically revealed annual depletion of ozone in a spot above the Arctic.
Who found ozone hole?
The discovery of the annual depletion of ozone above the Antarctic was first announced by Joe Farman, Brian Gardiner and Jonathan Shanklin, in a paper which appeared in Nature on May 16, 1985.