Earth's ozone layer is HEALING due to a reduction in.
Ozone depletion, gradual thinning of Earth ’s ozone layer in the upper atmosphere caused by the release of chemical compounds containing gaseous chlorine or bromine from industry and other human activities. ozone depletion Antarctic ozone hole, September 17, 2001.
Conclusions: Looking back over the scientific investigation of ozone depletion, we can see how the Molina-Rowland hypothesis evolved with new data. When chlorine nitrate, a chemical that ties up chlorine in an ozone-safe form, was added to the hypothesis, the expected amount of ozone loss decreased. Then, when polar clouds were considered, the expected ozone loss increased. Through all these.
Ozone Depletion: Essay on Ozone Layer Depletion. Article shared by: ADVERTISEMENTS: Here is your essay on ozone layer depletion! Ozone (O 3) is a triatomic form of oxygen. It is found largely in the stratosphere that extends from about 6 km at the poles and 17 km at the equator to about 50 km above the earth’s surface. It is present in traces less than 1 ppm) in the atmosphere. It has a peak.
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.
As a result, the hole in the ozone layer has been shrinking and the ozone layer has been recovering. The ozone layer was discovered in 1913 by French physicists Charles Fabry and Henri Buisson. Its properties were explored in detail by the British meteorologist G. M. B. Dobson, who developed a simple spectrophotometer, the Dobsonmeter.
The hole in the ozone layer has been a cause for concern for a number of years. UK ozone levels are recorded regularly to assess the changing state of the ozone layer and help us to understand the.
The ozone hole is formed each year in the Southern Hemisphere spring (September-November) when there is a sharp decline (currently up to 60%) in the total ozone over most of Antarctica. During the cold dark Antarctic winter, stratospheric ice clouds (PSCs, polar stratospheric clouds) form when temperatures drop below -78C. These clouds are responsible for chemical changes that promote.