Featured Research

from universities, journals, and other organizations

Discovery Of New Ozone-Destroying Chemical

Date:
September 2, 1998
Source:
CSIRO Australia
Summary:
CSIRO scientists have discovered a new ozone-destroying chemical in the atmosphere, as positive signs emerge that damage to the ozone layer should decline in the next decade. Halon-1202, which has an ozone depletion potential approximately half that of the common CFCs, has increased five-fold in the atmosphere since the late 1970s.

CSIRO scientists have discovered a new ozone-destroying chemical in the atmosphere, as positive signs emerge that damage to the ozone layer should decline in the next decade.

Related Articles


Halon-1202, which has an ozone depletion potential approximately half that of the common CFCs, has increased five-fold in the atmosphere since the late 1970s.

During the past two years the atmospheric concentration of halon-1202 has been growing at 17 per cent per year.

Unlike other halons used in the past for firefighting, halon-1202 is not controlled by the Montreal Protocol. The source of the new halon is a mystery, adding to scientists' concerns over its potential impact on the ozone layer.

"The rapid growth of halon-1202 comes as a surprise to us," says Dr Paul Fraser from CSIRO Atmospheric Research.

Dr Fraser speculates that gas may be by-product of inefficient production of other halons in developing countries. Alternatively, he says, some countries might be manufacturing halon-1202 for military applications.

Under the Montreal Protocol, developing countries have until 2010 before they must completely phase out halon production. China, the Republic of Korea, India and Russia are the only countries known to still be producing halon.

Continuing growth of halons in the atmosphere is in stark contrast to what is happening with CFCs.

"Our measurements show that most CFCs are either slowing down their atmospheric growth rate, have stabilised in the atmosphere or are actually dropping in concentration," says Dr Fraser.

"The international community will have to consider extending the ban on production of halons to halon-1202 if we are to protect the ozone layer," says Dr Fraser.

The Australian Government has recognised the problem of halon-1202. At a recent meeting of Montreal Protocol countries in Geneva, Australia was successful in having the issue referred to the Protocol's Scientific Assessment Panel.

Dr Fraser expects that ozone recovery is likely to be detected in the next 10-20 years. However, continued emissions of halons will delay this recovery.

CSIRO's discovery comes from measurements of pristine air collected at the Bureau of Meteorology's Cape Grim baseline air pollution station in north-western Tasmania. CSIRO's research into ozone depleting chemicals is being done in collaboration with the Co-operative Research Centre for Southern Hemisphere Meteorology.

Anyone who has a halon fire extinguisher should contact the DASCEM Halon Bank on freecall 1800 65 80 84.

A graph showing a rapid rise in the atmosphere of halon-1202 is available on request from the Division. Broadcast quality video footage of Cape Grim is also available on request.

More information from:

Paul Holper 03 9239 4661 (W); 0419 894 427 (mobile)03 9583 9903 (H)paul.holper@dar.csiro.au

Dr Paul Fraser 03 9239 4613 (W)03 9787 2161 (H)paul.fraser@dar.csiro.au


Story Source:

The above story is based on materials provided by CSIRO Australia. Note: Materials may be edited for content and length.


Cite This Page:

CSIRO Australia. "Discovery Of New Ozone-Destroying Chemical." ScienceDaily. ScienceDaily, 2 September 1998. <www.sciencedaily.com/releases/1998/09/980902054712.htm>.
CSIRO Australia. (1998, September 2). Discovery Of New Ozone-Destroying Chemical. ScienceDaily. Retrieved February 28, 2015 from www.sciencedaily.com/releases/1998/09/980902054712.htm
CSIRO Australia. "Discovery Of New Ozone-Destroying Chemical." ScienceDaily. www.sciencedaily.com/releases/1998/09/980902054712.htm (accessed February 28, 2015).

Share This


More From ScienceDaily



More Earth & Climate News

Saturday, February 28, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Whale-Watching Scientists Spot Baby Orca

Whale-Watching Scientists Spot Baby Orca

AP (Feb. 28, 2015) Researchers following endangered killer whales spotted a baby orca off the coast of Washington state, the third birth documented this winter but still leaving the population dangerously low. (Feb. 28) Video provided by AP
Powered by NewsLook.com
Bridge Collapses Due to Flooding in Bolivia

Bridge Collapses Due to Flooding in Bolivia

Reuters - News Video Online (Feb. 28, 2015) Heavy rain and flooding sweep through parts of Bolivia causing damage and leaves more than 2,000 people homeless. Sophia Soo reports. Video provided by Reuters
Powered by NewsLook.com
Death Toll from Afghan Avalanches Tops 200

Death Toll from Afghan Avalanches Tops 200

AFP (Feb. 27, 2015) More than 200 people have been killed in a series of avalanches triggered by heavy snowfall in Afghanistan. Duration: 00:42 Video provided by AFP
Powered by NewsLook.com
France, Philippines Call for Agreement on Climate Change

France, Philippines Call for Agreement on Climate Change

Reuters - News Video Online (Feb. 27, 2015) The presidents of France and the Philippines issue a joint appeal for a binding agreement on climate change. Katie Sargent reports. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins