Ozone hole has 'Australia dried'

April 21, 2011 last updated at 19: 39 GMT by Richard Black environment correspondent, BBC News are clouds in the polar stratosphere, ozone is broken down the Antarctic ozone hole is about a third blame for Australia's recent series of droughts, Scientists say.

Writing in the journal Science, close, that the hole in the southern hemisphere, even the tropics right wind and rain moved pattern.

Their climate models suggest the effect in particular was strong in Australia.

Many parts of the country have forced with cities, investments in technologies such as desalination and businesses close drought seen in recent years.

The scientists behind the new study - led by Columbia University in New York - added the ozone hole in standard climate models to investigate how wind and rain have influenced it could.

"The ozone hole results in a southward shift of the high-latitude - and the whole tropical circulation moves South," said Columbia Sarah Kang.

Of particular interest, it was migration from the southern hemisphere jet stream South.

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there are also the rise in carbon dioxide, and acts in the same direction as the ozone hole "

end quote Dr. Sarah Kang Columbia University this high-altitude winds are the key to determining weather patterns, in both hemispheres." Much of the cold weather is felt in the United Kingdom in the last couple of winter, for example, caused by the blockade of the stream, the northern hemisphere.

The Columbia team found that overall the ozone hole move precipitation South brought together with the winds.

But there are regional differences, in particular in terms of Australia.

"In terms of average for this zone, [the ozone hole drives] over a 10% - but for Australia, it is about 35%," Dr. Kang told BBC News.

Their modeling showed that due to greenhouse gas emissions also a factor - although natural climate cycles are Australia for important, sustained global warming serious droughts in the era before ozone depletion and global warming in the late twentieth century seen.

"This study illustrate the important point, the different mechanisms of global change are the climate change impact, we see all over the world, to the" Professor Myles Allen of the University of Oxford, a leading UK climate Modeller observed.

"It is very important to unpack them all rather than assuming that any burden Lake is we down simply to the greenhouse gas-mediated warming."

No reverse

Ozone depletion is through chemical reactions in the stratosphere, causing upper atmosphere.

The chemicals involved of substances such as chlorofluorocarbons (CFCS) and their relatives, the parentheses in air-conditioning, cooling, and aerosol cans.

Desalination is one of the methods for the control of Australia's dwindling water supply is used

Although the UN Montreal Protocol emissions of these substances clearly has steamed it for decades in the atmosphere to endure, and so its effects are still felt.

The ozone layer blocks the harmful ultraviolet rays of the Sun, which can cause skin cancer and other diseases.

Earlier this month, the World Meteorological Organization showed that the Arctic region experienced the worst ozone depletion on record - a series of unusual weather conditions.

But the forecast is that even the Antarctic ozone hole - what is should be more severe than the equivalent of Arctic - 2045-60 fixed.

Sarah Kang warns that this alone is not from climatic conditions in Australia or elsewhere in the southern hemisphere.

"It is repaired as the ozone hole, to work to go to reverse this trend;" but there are also the rise in carbon dioxide, and that is be in the same direction as the ozone hole, "said she."

Australia permanently dry weather caused great impact on communities, farms and nature.

In recent years, the volume of water was the Perth, the Western Australian capital, flows into the reservoirs only a third of what it was during most of the twentieth century.

The Murray-Darling Basin, which is located in the densely populated South-East, is the subject of a somewhat controversial plan with the aim of water quite against the background of the youngsters, to distribute drought, natural climate variability and greenhouse gas-mediated global warming.

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