This highly useful ozone layer in the upper atmosphere The ozone hole and petroleum release essay been threatened by a wide range of human activities. Many have worried that ozone holes might start appearing over other areas of the globe, though to date the only other large-scale depletion is a smaller ozone "dimple" observed during the Arctic spring around the North Pole.
These complex chemistry transport models e. This proves ozone depletion is a big issue that needs attention. Crutzen then noted that increasing use of fertilizers might have led to an increase in nitrous oxide emissions over the natural background, which would in turn result in an increase in the amount of NO in the stratosphere.
They were used in air conditioning and cooling units, as aerosol spray propellants prior to the s, and in the cleaning processes of delicate electronic equipment. The lack of sunlight contributes to a decrease in temperature and the polar vortex traps and chills air.
Inrepresentatives from 43 nations signed the Montreal Protocol. Cl and Br atoms destroy ozone molecules through a variety of catalytic cycles. The ozone does not disappear through the layer, nor is there a uniform "thinning" of the ozone layer. On the date of 16th Septemberthe Montreal Protocol to prevent ozone depletion was opened for signing.
These substances are being gradually removed from the atmosphere; since peaking inthe Effective Equivalent Chlorine EECl level in the atmosphere had dropped about 10 percent by Villanueva explain that it is a testimony of what humans can achieve when they put their minds and strengths together to face a common threat.
Under Ruckelshaus and his successor, Lee Thomas, the EPA pushed for an international approach to halocarbon regulations.
In twenty nations, including most of the major CFC producers, signed the Vienna Convention for the Protection of the Ozone Layerwhich established a framework for negotiating international regulations on ozone-depleting substances. Earth This will cause humans suffering like skin cancer and UV radiation may kill plankton.
CFCs would remain in the stratosphere for another years if none we have taken for the problem. Although considerable variability is expected from year to year, including in polar regions where depletion is largest, the ozone layer is expected to begin to recover in coming decades due to declining ozone-depleting substance concentrations, assuming full compliance with the Montreal Protocol.
Thus policies protecting the ozone layer have had benefits in mitigating climate change. Besides, we should always unplug or switch off electronic instruments when they are not in use. There are three types of PSC clouds—nitric acid trihydrate clouds, slowly cooling water-ice clouds, and rapid cooling water-ice nacerous clouds—provide surfaces for chemical reactions whose products will, in the spring lead to ozone destruction.
Companies should not use the ODS and turn to product that is ozone-friendly as many as possible. Ozone shield or ozone hole were useful "easy-to-understand bridging metaphors".
As mentioned above, when such ozone-depleting chemicals reach the stratosphere, they are dissociated by ultraviolet light to release chlorine atoms. James Lovelock had recently discovered, during a cruise in the South Atlantic inthat almost all of the CFC compounds manufactured since their invention in were still present in the atmosphere.
Ozone concentrations in the lower stratosphere over Antarctica will increase by 5—10 percent by and return to pre levels by about — The ultra-violet rays can cause skin cancer.
The excessive ultra-violet radiation also harms the plants. These low temperatures form cloud particles. The relationship between malignant melanoma and ultraviolet exposure is not yet fully understood, but it appears that both UVB and UVA are involved.
Americans voluntarily switched away from aerosol sprays before legislation was enforced, while climate change failed to achieve comparable concern and public action. Ozone hole and its causes[ edit ] Ozone hole in North America during abnormally warm reducing ozone depletion and abnormally cold resulting in increased seasonal depletion.
Harankhedkar Many other countries have signed treaties and written laws restricting the use of CFCs. Ozone is formed in the stratosphere when oxygen molecules photodissociate after intaking ultraviolet photons.
A year earlier, Richard Stolarski and Ralph Cicerone at the University of Michigan had shown that Cl is even more efficient than NO at catalyzing the destruction of ozone.Short Essay on Ozone Hole Article shared by We know that there is a thick layer (or blanket) of ozone gas in the upper atmosphere which acts as a preventive shield against the harmful ultra-violet rays.
The Ozone Hole and Petroleum Release Introduction The atmosphere can be divided into four layers based on temperature variations.
The closest layer to the Earth is called the troposphere and it extends from Earth's surface up to 7 km (23, ft) at the poles, and about km (56, ft) at the equator. The main cause of ozone depletion and the ozone hole is manufactured chemicals, especially manufactured halocarbon refrigerants, solvents, propellants and foam-blowing agents (chlorofluorocarbons Once in the stratosphere, they release halogen atoms through photodissociation, which catalyze the breakdown of ozone (O 3) into oxygen.
Ozone Depletion – Essay Example Ozone layer is a thin layer that is located within the stratosphere and contains high concentration of ozone.
It protects our planet from the destructive effect of ultraviolet radiation. Read this essay on Ozone Hole.
Come browse our large digital warehouse of free sample essays. Get the knowledge you need in order to pass your classes and more. the ultraviolet radiation from the sun causes them to break apart and release chlorine atoms which react with ozone, starting chemical cycles of ozone destruction that deplete the.
In fact, a major hole in the ozone layer above the Antarctica skyline now threatens the continent badly.
There are plenty of causes and effects of ozone depletion, CFC emission being one. they break down to release a free chlorine atom due to ultraviolet radiation. Solution on Ozone Layer Depletion September 16 was voted the world ozone.Download