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Latest Scientific Assessment of Ozone Depletion Stories

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2009-04-11 12:12:31

Earth's ozone layer should eventually recover from the unintended destruction brought on by the use of chlorofluorocarbons (CFCs) and similar ozone-depleting chemicals in the 20th century. But new research by NASA scientists suggests the ozone layer of the future is unlikely to look much like the past because greenhouse gases are changing the dynamics of the atmosphere. Previous studies have shown that while the buildup of greenhouse gases makes it warmer in troposphere "“ the level of...

2009-02-09 11:26:10

U.S. scientists say global warming might delay the recovery of stratospheric ozone in some parts of the Earth, negatively affecting public health. Researchers led by Johns Hopkins University Professor Darryn Waugh said they discovered increasing greenhouse gases could delay, or even postpone indefinitely, the recovery of stratospheric ozone in some regions of the Earth, including Australia and Brazil, possible taking a toll on public health. They said climate change could cause variations in...

2006-08-30 17:31:16

WASHINGTON (Reuters) - Earth's protective ozone layer, which was notably thinning in 1980, may be fully recovered by mid-century, climate scientists said on Wednesday. Ozone in the stratosphere, outside the polar regions, stopped thinning in 1997, the scientists found after analyzing 25 years worth of observations. The ozone layer shields the planet from the sun's harmful ultraviolet radiation, but human-made chemicals -- notably the chlorofluorocarbons found in some refrigerants and...

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2006-08-30 16:22:31

A new study using NASA and National Oceanic and Atmospheric Administration (NOAA) data finds consistent evidence that Earth's ozone layer is on the mend. A team led by Dr. Eun-Su Yang of the Georgia Institute of Technology, Atlanta, analyzed 25 years of independent ozone observations at different altitudes in Earth's stratosphere, which lies between 10 and 50 kilometers (six and 31 miles) above the surface. The observations were gathered from balloons, ground-based instruments and NASA/NOAA...

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2006-08-18 06:55:00

GENEVA -- The earth's ozone layer is finally on the mend after decades of damage, two UN agencies reported on Friday. However, the World Meteorological Organization (WMO) and the UN Environmental Programme (UNEP) said the protective layer, which filters dangerous solar radiation, was recovering more slowly than experts had originally hoped. Over huge areas of Europe, North America and Asia in the northern hemisphere and over southern Australasia, Latin America and Africa, the layer would be...

2005-12-08 14:20:00

NEW YORK -- An increase in exposure to ultraviolet radiation as result of ozone depletion in the stratosphere could in future lead to a considerable increase in the incidence of cataracts in the US population, researchers report. Ozone screens out most of the ultraviolet radiation coming from the sun. Although progress is being made in reducing the degree of ozone depletion, Dr. Sheila K. West of Johns Hopkins Hospital, Baltimore and colleagues note in the American Journal of Epidemiology...

2005-10-18 11:50:44

GENEVA (Reuters) - Depletion of the ozone layer above Antarctica, caused by emissions of industrial chemicals, seems to have peaked, indicating that global environmental pacts were working, U.N. scientists said on Tuesday. The seasonal hole above the South Pole and Antarctica is now shrinking after falling short of the record years of 2003 and 2000, the United Nations' World Meteorological Organization (WMO) said in its latest bulletin. It peaked at 26.9 million sq kms on September...

2005-08-30 13:57:14

A new global study involving long-term data from satellites and ground stations indicates Earth's ozone layer, while still severely depleted following decades of thinning from industrial chemicals in the atmosphere, is no longer in decline. Betsy Weatherhead, a researcher with the Cooperative Institute for Research in Environmental Sciences, a joint institute of the University of Colorado at Boulder and the National Oceanic and Atmospheric Administration and corresponding author of the...

2005-08-23 10:42:11

GENEVA (Reuters) - The winter hole in the ozone layer above Antarctica appears to have grown from last year but is still smaller than in 2003, when it was at its largest, the World Meteorological Organization (WMO) said on Tuesday. The UN agency's top ozone expert added that seasonal depletion of the protective gas layer, which filters harmful ultraviolet rays that can cause skin cancer, may become more pronounced in the near future before the problem diminishes. Large reductions in...

2005-08-23 10:40:00

GENEVA -- The winter hole in the ozone layer above Antarctica appears to have grown from last year but is still smaller than in 2003, when it was at its largest, the World Meteorological Organization (WMO) said on Tuesday. The UN agency's top ozone expert added that seasonal depletion of the protective gas layer, which filters harmful ultraviolet rays that can cause skin cancer, may become more pronounced in the near future before the problem diminishes. Large reductions in the ozone layer,...


Word of the Day
glogg
  • Scandinavian punch made of claret and aquavit with spices and raisins and orange peel and sugar.
This word comes from the Swedish 'glogg,' which is an alteration of 'glodgat,' mulled (wine).
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