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Scientists still waiting for clear signs of ozone hole healing

Last Updated: Wednesday, December 18, 2013, 10:53

Earth`s upper atmosphere is still so saturated with ozone-eating chlorine that it will take about another decade for evidence that a nearly 25-year-old ban on such destructive chemicals is working, scientists said.

Ozone hole still not on path of recovery

Last Updated: Thursday, December 12, 2013, 13:59

NASA scientists have found that declining chlorine in the stratosphere has not yet caused a recovery of the ozone hole - formed annually over Antarctica.

Antarctic Ozone hole slightly smaller than average in 2013

Last Updated: Saturday, October 26, 2013, 12:45

The ozone hole, which forms every year in the stratosphere over Antarctica, is slightly smaller in size than average this year, according to NASA satellite data.

Ozone hole over Antarctica smallest in last decade

Last Updated: Saturday, February 09, 2013, 10:48

Satellite images show that the recent ozone hole discovered over Antarctica was the smallest seen in the past decade.

Antarctic ozone hole shrinks to 2nd smallest in 20 yrs

Last Updated: Thursday, October 25, 2012, 14:09

Scientists attribute the change to warmer temperatures in the Antarctic lower stratosphere.

Current Antarctic ozone hole 9th largest on record

Last Updated: Saturday, October 22, 2011, 17:19

The Antarctic ozone hole, which yawns wide every Southern Hemisphere spring, reached its annual peak on Sept. 12, becoming the ninth largest ozone hole on record.

`Antarctic ozone hole now as big as North America`

Last Updated: Sunday, October 16, 2011, 18:29

The first significant ozone hole above the Antarctic is now as big as North America, scientists have claimed.

Unprecedented ozone hole opens over Arctic

Last Updated: Monday, October 03, 2011, 15:31

Decreases in overhead ozone lead to increases in surface ultraviolet radiation.

Ozone hole over Antarctica on the road to recovery

Last Updated: Tuesday, May 17, 2011, 13:39

Researchers have derived evidence of ozone rebound, 22yrs after CFCs ban came into force.

Ozone hole linked to southern rain increases

Last Updated: Friday, April 22, 2011, 09:10

The hole in the ozone layer over Antarctica is a significant driver of climate change.

Ozone hole healing, can cause further global warming

Last Updated: Wednesday, January 27, 2010, 13:46

Antarctic ozone hole, which was once regarded as one of the biggest environmental threats, is now steadily closing, but its repair could actually increase temperatures in southern hemisphere, British scientists have claimed.