BBC News
Richard Black
Ozone destruction takes place within polar stratospheric clouds, with chlorine the main culprit
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.
"Winter in the Arctic stratosphere [...]
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Richard Black
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| The Arctic ozone hole lay over over populated regions for parts of winter and spring |
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.
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.
"Winter in the Arctic stratosphere [...]
Submit your suggestion / comments / complaints / Takedown request on lookyp.com@gmail.com
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