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PSCs I are supposed to be nitric acid and water mixtures that forms just above the frost point and can be either solid or liquid subjected on the conditions.PSCs 2, less common, are formed of water-ice crystals at lower temperatures.
When found in troposphere, ozone is considered a dangerous and unsafe pollutant and is one of the substances responsible for producing the greenhouse effect.
The Antarctic ozone hole discovery in 1985 was by British scientists Joesph Farman, Brian Gardiner, and Jonathan Shanklin of the British Antarctic Survey.
Reductions in stratospheric ozone will result in higher levels of UVB radiation.
Epidemiological studies reveal that UV-B causes nonmelanoma skin cancer.
Instruments were replaced and later, ozone depletion was accepted as genuine fact. "One Dobson Unit is the number of molecules of ozone that would be required to create a layer of pure ozone 0.01 millimeters thick at a temperature of 0 degrees Celsius and a pressure of 1 atmosphere".
Thesis Ozone Layer Depletion Introduction In Research Proposal
Generally, the air has an ozone measurement of 300 Dobson Units, equivalent to a layer of 3mm ozone thickness.
A massive hole in the ozone layer right above Antarctica terrify and threatens not only the continent, but many others regions that could be the sufferers of Antarctica's melting icecaps which are being caused by the harmful rays of the sun sipping through the hole in the ozone layer.
The main cause of this is the liberation and discharge of chlorofluorocarbons (CFCs), used in refrigeration systems, air conditioners, aerosols, solvents and in the production of some types of packaging materials.
Other compounds containing bromine and other halogen compounds, nitrogen oxides (NOx) are also responsible for ozone depletion.
CFC's are a common industrial product, Nitrogen oxides are mainly released as by-product of combustion processes, such as aircraft emissions.