HOME >> MEDICINE >> NEWS
Ozone recovering, but unlikely to stabilize at pre-1980 levels, says study

While Earth's ozone layer is slowly being replenished following an international 1987 agreement banning CFCs, the recovery is occurring in a changing atmosphere and is unlikely to stabilize at pre-1980 levels, says a new University of Colorado at Boulder study.

The recovery is a result of the 1987 Montreal Protocol banning chlorine pollutants from the atmosphere, said Betsy Weatherhead, a researcher with the Cooperative Institute for Research in Environmental Sciences, a joint institute of CU-Boulder and the National Oceanic and Atmospheric Administration. But by the end of the century, ozone levels could be slightly higher or slightly lower than before 1980 because of high natural variability and human caused changes like warming temperatures, said Weatherhead.

A paper by Weatherhead and Signe Bech Andersen of the Danish Meteorological Institute in Copenhagen is featured on the cover of the May 4 issue of Nature.

"We now have some confidence that the ozone layer is responding to the decreases in chlorine levels in the atmosphere due to the leveling off and decrease of CFCs, and most of the improvements are in agreement with what we had hoped for with the Montreal Protocol in place," she said. "But we are not out of the woods yet, and the ozone recovery process still faces a number of uncertainties."

At high latitudes, for example, warmer temperatures at Earth's surface can trigger colder conditions in the lower stratosphere and promote the formation of polar stratospheric clouds, which can contribute to severe ozone depletion. "During the next few years, ozone levels in the Arctic will be strongly influenced by stratospheric temperature, possibly resulting in delayed recovery or record-low observations," the authors wrote in Nature.

The new study shows a larger than expected recovery of ozone in the northern mid-latitudes in recent years, she said. The increase may be partially a result of natural variability, includ
'"/>


3-May-2006


Page: 1 2 3

Related medicine news :

1. Just breathe: Ozone forecaster unveiled at University of Houston, available via Web
2. Offenders unlikely to seek help when experiencing mental distress
3. Effects of new sleep medication appear unlikely to have potential for abuse or cognitive impairment
4. Search for cancer genes unlikely to succeed, say experts
5. Nearly half of public health employees unlikely to work during pandemic
6. Exercise unlikely to cause sudden cardiac death in women
7. Medical experts: US unlikely to have enough vaccines to stop avian flu
8. Access to antiretrovirals unlikely to reduce HIV infection rates
9. Anti-HIV drugs unlikely to stop HIV spread
10. Study finds some people in pain unlikely to seek treatment
11. Consumption of omega-3 fatty acids unlikely to significantly reduce risk of cancer

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Ozone recovering but unlikely stabilize pre levels says study

(Date:10/30/2014)... have to be at least 2 years old to ... no official U.S. guidance exists other than the general ... breastfeed for at least the first six months. , ... That,s the question that motivated researchers at the University ... study the eating patterns of American infants at 6 ...
(Date:10/30/2014)... A mathematical model developed by NIH grantees predicts that ... prevent HIV infection via vaginal sex, whereas just two ... via anal sex. This finding helps explain why two ... in women failed to show efficacy. Participants in the ... Truvada and tenofovir (another antiretroviral) for HIV prevention were ...
(Date:10/30/2014)... 30, 2014 Timothy, InstaKNOT’s ... Beach firefighters, showing that you are never too young ... met firefighters Tracey and Carl at the 2013 Santa ... the Pompano Beach Chamber of Commerce. Tracey gave Timothy ... letting Timothy wear his real fireman’s hat, and extending ...
(Date:10/30/2014)... Don Allred Insurance, a leading provider of ... North Carolina residents, is excited to announce the Grand ... Mall. The new branch has been up and running ... all facets of the insurance selection process from quote ... Allred couldn’t be happier with the timing of this ...
(Date:10/30/2014)... Five months after their expansion, the AV ... branding and a website to accompany their recent change ... promotion to name partner earlier this year, Hodgkinson Street ... name and better reflect their combined litigation expertise. As ... to implement new branding reflects Hodgkinson Street Mepham’s collaborative ...
Breaking Medicine News(10 mins):Health News:What do American babies eat? A lot depends on Mom's socioeconomic background 2Health News:What do American babies eat? A lot depends on Mom's socioeconomic background 3Health News:Model by NIH grantees explains why HIV prevention dosing differs by sex 2Health News:4-year-old InstaKNOT CEO Honors Local Firefighters with Community Support 2Health News:4-year-old InstaKNOT CEO Honors Local Firefighters with Community Support 3Health News:4-year-old InstaKNOT CEO Honors Local Firefighters with Community Support 4Health News:Allred Insurance Satellite Office Grand Opening 2Health News:Hodgkinson Street Mepham Rebrands 2
(Date:10/30/2014)... , Oct. 30, 2014 Today Eli Lilly ... of its long-standing technology transfer program to increase the ... in 2003, the effort included Lilly donating manufacturing technology ... China , India ... South Africa – all MDR-TB ,hot spots., ...
(Date:10/27/2014)... 27, 2014 Research and Markets has ... 2014-2018" report to their offering. H1N1 ... a variant of the swine H1N1 virus, known as H1N1v ... nose, throat, and lungs. H1N1 virus is an RNA virus ... animal species such as humans, swine, birds, seals, and horses. ...
(Date:10/27/2014)... EAST TAUNTON, Mass. , Oct. 27, 2014 /PRNewswire/ ... the $15 billion global hip and knee replacement device market, ... and knee replacement technology at the American Association of ... the Sheraton Dallas Hotel in Dallas, Texas ... is a Bronze corporate partner of the organization. ...
Breaking Medicine Technology:Lilly Shares Insights from Decade-Long Technology Transfer Experience 2Lilly Shares Insights from Decade-Long Technology Transfer Experience 3Lilly Shares Insights from Decade-Long Technology Transfer Experience 4Global H1N1 Vaccines Market 2014-2018: Key Vendors are AstraZeneca, GlaxoSmithKline, Novartis and Sanofi Pasteur 2Global H1N1 Vaccines Market 2014-2018: Key Vendors are AstraZeneca, GlaxoSmithKline, Novartis and Sanofi Pasteur 3OMNIlife science to Exhibit at American Association of Hip and Knee Surgeons 24th Annual Meeting in Dallas November 6-9 2OMNIlife science to Exhibit at American Association of Hip and Knee Surgeons 24th Annual Meeting in Dallas November 6-9 3
Cached News: