Selasa, 04 Oktober 2011

The threat of polar ozone layer depletion

Arctic ozone layer in the protective ultraviolet radiation has thinned about 30 percent this winter.
Thus obtained leaked from the UN weather agency in Geneva, on Tuesday (5 / 4).
The damaged ozone layer in the Arctic is not the same as damage the ozone in Antarctica known as the "ozone hole". This hole is formed when sunlight at all in the spring each year.
But the damage situation in the Arctic, a similar cause. Ozone exposed to compounds in air pollution that is triggered by a combination of very cold temperatures and sunlight.
Well, this winter, brittle and thinning ozone layer of about 30 percent due to the reduced atmosphere in the Arctic.
The combination of extremely cold temperatures in the stratosphere, the second major layer of Earth's atmosphere, just above the troposphere, ozone-consuming drive of chemicals derived from CFC aerosol sprays and air conditioning (AC). This is the cause of ozone depletion in the Arctic this winter.
"It's very sudden and unusual," said Bryan Johnson, a chemist who worked at the U.S. National Oceanic and Atmospheric Administration's Earth System Laboratory in Boulder, Colorado.
He is concerned with global warming is happening in the Arctic, given the region felt the first effects of global warming.
"Arctic stratosphere to be susceptible to ozone damage caused by ozone contamination by substances chemically related to human activity," said UN secretary-general Michel Jarraud Weather Agency.
Depletion of the ozone layer in the Arctic are causing weather anomalies as the temperature drops below -78 degrees Celsius (-108 Fahrenheit) and ice forming multicolored clouds.
"Depletion of ozone in the Arctic will affect the people who live in northern areas, more towards Iceland, northern Norway, north coast of Russia," he added.
He called on the people in the region to be more careful when outdoor activities, of course, by wearing sunscreen and sunglasses. (AP/OL-9)

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