The ozone hole in Arctic
06-17-2011, 05:43 AM,
#1
The ozone hole in Arctic
The annual thinning of ozone over the Arctic is shaping up to be especially severe this spring, measurements by European scientists indicate. During the past six weeks, a large portion of the region’s stratosphere has lost at least half of the layer that normally filters out much of the sun’s harmful ultraviolet rays.
Ozone destruction occurs in low-pressure rings of winds, known as polar vortices, that form over the poles each winter and isolate air masses in these regions from midlatitude air. The destruction of ozone in the Arctic vortex could worsen for another month, observes Markus Rex, an atmospheric scientist with the Alfred Wegener Institute for Polar and Marine Research in Potsdam, Germany, which coordinated the measurements and announced the results March 14.
Though stratospheric ozone thins annually in the Arctic, the loss has been so rapid and severe this year that it appears headed to chalk up a record.
Bryan Johnson of the National Oceanic and Atmospheric Administration in Boulder, Colo., says his group’s balloon measurements of stratospheric ozone over Greenland confirm that this year is exceptional. Total atmospheric ozone ranged from 430 to 480 dobson units (a measure of ozone levels in a column of air) in mid-March during each of the last three years. On March 15 this year, the team measured only 306 dobson units.

A cold stratosphere is the key to Arctic ozone depletion. And the Arctic stratosphere was especially cold this winter — in some parts below –85° Celsius. Global warming played a role in the high-altitude cooling, because when greenhouse gases trap heat near Earth’s surface, that energy doesn’t rise to warm the stratosphere.
When the vortex is cold and stable, polar stratospheric clouds of ice crystals can form. These particles serve as the platform on which pollutant-induced reactions can break apart ozone. This year proved a good year for cloud formation, and even after the vortex starts to break apart, Rex says that it could take a few more weeks to shut down ozone’s destruction.
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06-22-2011, 11:02 AM,
#2
RE: The ozone hole in Arctic
Your information about The ozone hole in Arctic is really very serious and very sad news that because of our pollution our nature is damage seriously every year..An Arctic Ozone Hole, if similar in size to the Antarctic Ozone Hole, could expose over 700+ million people, wildlife and plants to dangerous UV ray levels.
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10-01-2011, 08:36 AM,
#3
RE: The ozone hole in Arctic
What ever info the world is receiving about the depletion of ozone layer in the arctic region is because of Alfred Wegener Institute which conducts research in the Arctic, Antarctic regions and oceans of the high and middle latitudes. It coordinates polar research in Germany and also provides major infrastructure to the international scientific community, such as the research icebreaker Polarstern and stations in the Arctic and Antarctica. The Alfred Wegener Institute is one of the seventeen research centres of the Helmholtz Association, this is the largest scientific organization in Germany. Thanks guys for helping the world to keep updated regarding this critical issue.
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10-19-2011, 01:24 PM,
#4
RE: The ozone hole in Arctic
its really dangerous. We should save ozone layer.
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10-22-2011, 08:56 AM,
#5
RE: The ozone hole in Arctic
With increase in pollution and the ratio of CO2 gases in the atmosphere, speed in depletion of ozone layer is increasing which is not good for human race or any living creature on earth. We have to take some important measure to save our planet by planting more and more trees.
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11-29-2011, 07:30 AM,
#6
RE: The ozone hole in Arctic
I do agree with you Ashley those people are really working hard in severe surrounding for a social cause and to save planet Earth, so we should support them buy contributing in reducing various types of pollution.
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