Jumat, 30 September 2011

depletion of the ozone layer in the polar north

Ozone layer in the Arctic continues to experience thinning. Air temperature is relatively low since the end of last year pushed ozone depletion on a new record. The measurement results show, half the ozone layer at an altitude of 20 kilometers has been damaged in just over a week, according to information reported by National Geographic Indonesia.

Markus Rex, scientists from the Alfred Wagener Institute (AWI), Germany, which monitors states that damage the ozone layer is predicted to continue to happen because the conditions that lead to ozone depletion continues. Therefore, Rex recommends extra attention in the form of protection against UV radiation is adequate in the spring of this year.

Ozone destruction occurs due to chlorofluorocarbons (CFCs) which became aggressive substances and destroy ozone when exposed to air is very cold. Scientists have attributed the phenomenon of ozone depletion to climate change, especially when last winter was colder air temperatures that cause further damage to the ozone layer.

An international environmental policy, called the Montreal Protocol that banned CFCs use of hazardous materials around the world starting in 1987. However, CFCs that have been released into the air in the previous decade in the atmosphere will remain there until the coming decades. Therefore, the fate of the ozone layer at the north pole is very dependent on air temperature in the stratosphere at an altitude of about 20 kilometers above the earth which also related to changes in the earth's climate.

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