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 ?
Which is why the continued depletion of ozone in lower latitudes caught scientists somewhat by surprise.
During the symposium on Ways to Mitigate Global Warming spearheaded by the Diocesan School Science Club and participated by the secondary students held at the Municipal Gymnasium in Tago town, this province, Concha, in his message read by PENRO information officer Johny Natad, urged all the students to help avert the impact of global warming and depletion of ozone layer.
The day is mainly intended to spread awareness of depletion of Ozone Layer and search for solutions to preserve it.
Depletion of Ozone Layer, he said, was one of the most serious environmental concerns threatening the very existence of life on earth.
NASA and NOAA have a mandate under the Clean Air Act to monitor ozone-depleting gases and stratospheric depletion of ozone.
Curve C shows extended chemical depletion of ozone from approximately 15 to 25 km and diminishing loss to 28 km relative to the outside vortex distribution (Curve A).
Global impacts of air pollution result from sources that may potentially change the upper atmosphere for example depletion of ozone layer and global warming.
So we took out a rally to create awareness among people telling them how important trees are for us and how important it is to protect our ecosystem as global warming is increasing and also there is depletion of ozone layer," said Khyatri Chawda, student.
This depletion of ozone has shifted the Southern Hemisphere's climate so that dry areas in the subtropics now see about 10 percent more precipitation in summer than they used to, scientists reported in the journal Science.
MoE Secretary Muhammad Javed Malik said depletion of Ozone layer was a serious global issue equally important like other environmental problems such as pollution, drought and desertification, loss of forests, disposal of solid and liquid wastes and loss of biodiversity.
Then, when it was discovered that certain chemicals called chlorofluorocarbons (CFCs) were causing the depletion of ozone in the atmosphere, the same groups launched a nasty campaign to discredit that science, too.
The depletion of ozone is also cooling the stratosphere over Antarctica, where the temperature has fallen by 7[degrees]C.