INTERNATIONAL DAY OF THE PRESERVATION OF THE OZONE LAYER.
Every year since 1994 marks the September 16, International Day for the Preservation of the Ozone Layer, as declared by the General Assembly of the United Nations in commemoration of the Montreal Protocol was signed on that date in 1987. Is to remind worldwide action in relation to the protection of the ozone layer.
Ozone is a gas that forms part of the atmosphere naturally. It is located in two regions of the same:
In the troposphere, the region closest to the earth (from the surface to 10 to 16 km high), is approximately 10% of it.
In the stratosphere (up to about 50 km) the remaining 90%. The area of \u200b\u200bthe stratosphere, is where lies the maximum ozone concentration, called the Ozone Layer. The ozone in the stratosphere is important because its function is to absorb some of the sun's ultraviolet radiation. This type of solar radiation is biologically harmful to life and here lies the importance of preserving the ozone layer.
The Programme United Nations Environment Programme (UNEP), developed the Montreal Protocol on Substances that Deplete the Ozone Layer, which identified the main substances that affect and established programs for their reductions, to its eventual elimination. Thanks to this Protocol, and since 1 July 1999 developing countries initiated the compulsory phase of production and consumption of chlorofluorocarbons (1) (CFCs) and from 1 January 2002 these countries stopped the use of halons (2) and methyl bromide.
Ozone is a gas that forms part of the atmosphere naturally. It is located in two regions of the same:
In the troposphere, the region closest to the earth (from the surface to 10 to 16 km high), is approximately 10% of it.
In the stratosphere (up to about 50 km) the remaining 90%. The area of \u200b\u200bthe stratosphere, is where lies the maximum ozone concentration, called the Ozone Layer. The ozone in the stratosphere is important because its function is to absorb some of the sun's ultraviolet radiation. This type of solar radiation is biologically harmful to life and here lies the importance of preserving the ozone layer.
The Programme United Nations Environment Programme (UNEP), developed the Montreal Protocol on Substances that Deplete the Ozone Layer, which identified the main substances that affect and established programs for their reductions, to its eventual elimination. Thanks to this Protocol, and since 1 July 1999 developing countries initiated the compulsory phase of production and consumption of chlorofluorocarbons (1) (CFCs) and from 1 January 2002 these countries stopped the use of halons (2) and methyl bromide.
chlorofluorocarbons, halons and methyl bromide destroy stratospheric ozone and cause every year the ozone hole generation (3) Antarctic. The problem of ozone layer ...
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... has been a major concern during the past 30 years it is expected to recover by 2050 and reach pre-1980 levels as a result of applying reduction program established by the Montreal Protocol. To do so, annually monitors the evolution of the ozone layer measurements by monitoring and benchmarking in different places. The measurements determine the extent and severity of the ozone hole.
Our country has four stations for these measurements, which are located in Buenos Aires, Comodoro Rivadavia, Ushuaia and Marambio Base. In the latter base also undertakes vertical profiles (ozonesonde), which enable us to know the distribution of ozone in the vertical place.
(1) Chlorofluorocarbons (CFCs) are gases that contain carbon, chlorine and fluorine. For many years were considered ideal for the modern world to be very stable, nonflammable, and poisonous, easy to store and cheap to produce. Were used as aerosol propellants, as a coolant in the manufacture of plastic and foam disposable containers, etc.. In the stratosphere, each CFC molecule can destroy thousands of ozone molecules.
(2) Halon and methyl bromide, have a structure similar to CFCs but contain bromine atoms instead of chlorine, are even more harmful. They are used primarily as fire extinguishers.
(3) Ozone Hole: polar region where the total ozone amount is less than 220 DU (DU, Dobson unit used to measure total atmospheric ozone). Sources
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- http://www.smn.gov.ar/
- http://es.wikipedia.org/wiki/Capa_de_ozono
- http://capadeozono.blogspot . com /
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