ozone depletion


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ozone depletion

The ongoing reduction of ozone in the stratosphere. Ozone (O3) is present in 1 ppm in the upper stratosphere, and it absorbs virtually all of the UV radiation from the sun; increased rates of sun-induced malignancies (e.g., melanomas) have been attributed to the destruction of the ozone layer. Ozone depletion is caused by the release of chloride ions from CFCs (chlorofluorocarbons) after release from air conditioners, spray cans, and manufacturing plants that produce electronics and plastics. CFCs degrade in the atmosphere, release chlorine and cause ozone destruction, remain free, or react with ozone to form ClO (chlorine monoxide); O3 is being depleted at a rate of 4–5% per decade.
References in periodicals archive ?
We see very clearly that chlorine from CFCs is going down in the ozone hole, and that less ozone depletion is occurring because of it,' said lead author Susan Strahan, an atmospheric scientist from NASA's Goddard Space Flight Centre in Greenbelt, Maryland.
The report stated that a 20 percent decline in ozone depletion during the winter months from 2005 to 2016 was expected.
Although warmer-than-average stratospheric weather conditions have reduced ozone depletion during the past two years, the current ozone hole area is still large compared to the 1980s, when the depletion of the ozone layer above Antarctica was first detected.
issues of climate change and ozone depletion, potential for improvement
The ozone depletion started quite late, but when it started, it came quite rapidly," Braathen told journalists in Geneva.
Climate change, ozone depletion and air pollution; legal commentaries within the context of science and policy.
An unusual cold spell in Antarctica this year sped up ozone depletion.
Keeping food cold but easily accessible is a resource-intensive undertaking, involving electricity, compressor motors, and insulation, as well as gases such as hydrochlorofluorocarbons and hydrofluorocarbons, which contribute to ozone depletion and the greenhouse effect.
Benefits are said to include zero ozone depletion potential, no global warming potential and relatively low emissions.
GFDL conducts leading-edge research to expand the scientific understanding of many topics, including weather and hurricane forecasts, El Nino prediction, stratospheric ozone depletion, and global warming.
This may have misled individuals who are not aware of the causes of ozone depletion.