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Ozone depletion (also referred to as ozone layer depletion) can be defined as the gradual thinning of the Earth’s ozone layer in the upper atmosphere which is caused by the release of chemical substances containing bromine or chlorine from industrial or other human activities. Substances that deplete the ozone include insulating foams, solvents, and refrigerants. Ozone depletion occurs by the release of chlorofluorocarbons and other ozone-depleting substances. Ozone depletion is largely a result of man-made substances. Find out what caused the ozone hole, and how the 1989 Montreal Protocol sought to put an end to ozone depletion. These chemicals break apart when they reach the stratosphere and release chlorine atoms that react with ozone and start the destruction that depletes the ozone layer. Ozone hole. Dichlorodifluoromethane is an inert gas once widely used in refrigeration applications and the manufacture of certain medications.
ozone had decreased greatly since the 1960s. Figure courtesy of NASA. The Antarctic ozone hole, as it came to be known, made depletion of .
The ozone layer has historically protected the Earth from the harmful UV rays, although in recent decades this protection has diminished due to stratospheric ozone depletion.
The ozone layer helps to protect life from harmful ultraviolet radiation.
In 1985, the scientists published an article in Nature an-nouncing that stratospheric ozone over Antarctica was reduced 40% in September, the end of the austral winter. Halogen source gases that contribute to ozone depletion are mostly chlorine- and bromine-containing chemicals that have very long lifetimes in the atmosphere.
Equivalent effective stratospheric chlorine (EESC) is a convenient parameter we use to estimate the amount of stratospheric ozone depletion due to these compounds.
What is EESC? These ozone-depleting substances were mostly introduced in the 1970s in a wide range of industrial and consumer applications, mainly refrigerators, air conditioners and fire extinguishers. Simply, ozone depletion is the depletion or deterioration of ozone layer, the layer which is found in the lower portion of the stratosphere (0 to 30 km (12 to 19 miles) above the earth). This gas is an example of a chlorofluorocarbon (CFC) and is more commonly known under the name freon-12.Due to concerns about the impact of this gas on the ozone layer, it has been banned in a number of nations and phased out of use in others out of … Ozone depletion is greatest at the South Pole.
Ozone layer is very important for human health and other living beings as it protects living …
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