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:


(Date:4/27/2017)... Jacksonville, Florida (PRWEB) , ... April 27, 2017 , ... ... qualified candidates. But they will rapidly reject an outdated healthcare executive resume. , “If ... good look at your executive resume and wondering if it’s as ready as you ...
(Date:4/27/2017)... ... April 27, 2017 , ... Goodcents Deli Fresh Subs announced a franchise expansion ... this year. , The first new location will open at the corner of ... 84th and Northern Lights Drive this fall. And the third location is in the ...
(Date:4/26/2017)... ... April 26, 2017 , ... Intalere, the healthcare industry leader ... “Make Plans for MACRA,” highlighting the impact of the Medicare Access and ... physicians and other clinicians are reimbursed for the care they deliver in Medicare. ...
(Date:4/26/2017)... N.J. (PRWEB) , ... April 26, 2017 , ... ... Inc. in Hackensack, N.J. has been honored by Enterprising Women magazine as ... that recognizes the world’s top women business owners. Winners have demonstrated that they ...
(Date:4/26/2017)... JOHYNSTON, Iowa (PRWEB) , ... April 26, 2017 ... ... agriculture? DuPont Pioneer today launched a unique website ( CRISPRCas.pioneer.com ) that demonstrates ... plants and help farmers produce more and better food, with fewer resources. It ...
Breaking Medicine News(10 mins):
(Date:4/19/2017)... VIEW, Calif. , April 19, 2017  IRIDEX ... it will release financial results for the first quarter ... 3, 2017.  The Company,s management team will host a ... 5:30 p.m. ET. Investors interested in listening ... (844) 707-0665 for domestic callers or (703) 326-3030 for ...
(Date:4/19/2017)... The Global Effective Microorganisms (EM) Market ... has covered and analysed the potential of Global Effective Microorganisms ... shares and growth factors. The report identifies and analyses the ... the global market. ... 152 Tables and Figures, 6 Major Company Profiles, spread across ...
(Date:4/19/2017)... 2017  Novartis today announced the publication of ... and Blood Institute (NHLBI) of the National Institutes ... with treatment-naïve severe aplastic anemia (SAA) achieved complete ... at the initiation of and concurrently with standard ... sequential treatment groups, or cohorts. Cohort 3 added ...
Breaking Medicine Technology:
Cached News: