Arctic ozone loss at record level

Subject: Arctic ozone loss at record level Mon Oct 03, 2011 4:49 am

Ozone loss over the Arctic this year was so severe that for the first time it could be called an "ozone hole" like the Antarctic one, scientists report.

Arctic ozone loss at record level _55784614_ozone

Arctic ozone loss at record level _55784614_ozone

About 20km (13 miles) above the ground, 80% of the ozone was lost, they say.

The cause was an unusually long spell of cold weather at altitude. In cold conditions, the chlorine chemicals that destroy ozone are at their most active.

It is currently impossible to predict if such losses will occur again, the team writes in the journal Nature.

Early data on the scale of Arctic ozone destruction were released in April, but the Nature paper is the first that has fully analysed the data.

http://www.bbc.co.uk/news/science-environment-15105747

Arctic ozone loss at record level

Arctic ozone loss at record level

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