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:2/9/2016)... ... February 09, 2016 , ... Dr. Rassouli, cosmetic dentist in ... is among the most popular cosmetic procedures in dentistry today, but the cost often ... put them at risk of teeth whitening-related damage. For a limited time, Dr. Rassouli ...
(Date:2/9/2016)... , ... February 09, 2016 , ... ... to create “Ebola: In Praise of Prevention,” an animated video designed ... English and French translations of the video are being distributed throughout Togo, Liberia, ...
(Date:2/8/2016)... ... 08, 2016 , ... CURE Media Group , the nation’s leading digital ... Myeloma Heroes Awards event , which will annually honor individuals making heroic contributions in ... The MM Heroes Awards nomination process is officially open through February 17 ...
(Date:2/8/2016)... ... ... is famous for gift giving with flowers, chocolates and other tokens of affection meant to ... more than 5.6 million Americans suffering with Alzheimer’s, those store bought gifts - no ... lives they’ve led and the people they’ve touched. , That’s why Give ...
(Date:2/8/2016)... ... 08, 2016 , ... Steve Helwig & Associates Insurance & Financial, serving the ... has teamed up with Citizens Opposed to Domestic Abuse in support of its efforts ... all those victimized by the fear of violence in their own homes, donations may ...
Breaking Medicine News(10 mins):
(Date:2/8/2016)... Feb.8, 2016 Cardiovascular Surgery Devices - ... GlobalData,s Medical Devices sector report, "Cardiovascular Surgery Devices ... overview of Cardiovascular Surgery Devices currently in pipeline ... The report provides comprehensive information on the ... at various stages of development. The report reviews ...
(Date:2/8/2016)... YORK , Feb. 8, 2016  Labvantage ... today announces its first male sexual enhancement product, ... EnduramenT combines proven ethnobotanicals with a patented biomedical ... nitric oxide, the chemical compound responsible for many ... Forgoing the use ...
(Date:2/8/2016)... and FAIRFIELD, N.J. , ... and Medimetriks Pharmaceuticals, Inc. (Medimetriks) today announced that they ... development and commercialization rights for OPA-15406 in the U.S. ... also provides manufacturing rights.  OPA-15406 is a topical, non-steroidal ... atopic dermatitis. --> --> ...
Breaking Medicine Technology:
Cached News: