Tuesday, March 15, 2011
That warmer temperatures at the surface can cause extreme cold aloft is no paradox, Rex explained.
"To put it in a simplified manner, increasing greenhouse gas concentrations retain the Earth's thermal radiation at lower layers of the atmosphere, thus heating up these layers," he said. "Less of the heat radiation reaches the stratosphere, intensifying the cooling effect there."
Scientists haven't worked out all the details yet and don't fully understand how ozone interacts with climate change. A 3.5 million euro ozone investigation involving 16 research institutions from eight European countries is now underway.
The ozone layer will continue to recover, Rex said, despite this winter's record loss in the Arctic. But countries must continue to eliminate the damaging chemicals.
"By virtue of the long-term effect of the Montreal Protocol, significant ozone destruction will no longer occur during the second half of this century," Rex said.
Posted by Voyage Adviser at 5:41 AM