In the first three months of 2011, the Arctic lost a record amount of ozone. This is reported in a paper published in the journal Nature, a summary of which leads New Scientist.
It seems that every year over the Antarctic ozone hole is formed — an area where the ozone layer is much thinner than usual. This phenomenon is observed each spring since the mid 80's of the last century. However, the amount of ozone in the Arctic, though varying from year to year (the minimum thickness of the layer reached in 1996 and 2005), but never reached as low as in the Antarctic.
According to scientists, a new record for the first time on record will compare the Arctic and the Antarctic ozone hole — at altitudes above 18-20 km the ozone loss in the order of 80 percent. The total amount of this substance was at least two times less than in the previous record year. It is noteworthy that uncharacteristic thinning Arctic ozone layer promised in March 2011.
According to researchers, this fact is related to the low temperatures in the stratosphere. The fact that these conditions lead to the formation of the upper atmosphere of active chlorine compounds, which are the basic "fighter" ozone. According to the Intergovernmental Panel on Climate Change, the United Nations, in 1979, a gradual cooling of the stratosphere.
In turn, the cause of low temperatures in the stratosphere can be, in particular, and global warming — we know that it heats the lower layers and, in general, cools the upper. However, researchers have been slow to link together the two phenomena, because their relationship can not be considered proven.
On the subject:
The scientists concluded that the Arctic was a large ozone hole
Over the Arctic was a large ozone hole. This is the conclusion an international team of scientists. They analyzed data from several meteorological satellites.
Researchers' calculations, square holes through which penetrates ultraviolet radiation, about 2 million square kilometers. Her appearance could cause global climate change and industrial emissions containing chlorine. The ozone hole appeared over the Arctic for the first time.