منابع مشابه
Stratospheric ozone and health.
BACKGROUND Stratospheric ozone is being depleted and ambient ultraviolet (UV) irradiance is probably increasing. While remedial steps have been taken through the Montreal protocols, at best it will take some 90 years for stratospheric ozone concentrations to return to the levels existing in the 1970s. METHODS The evidence that these changes may have harmful effects on health has been reviewed...
متن کاملStratospheric Ozone Depletion
There is now strong evidence that a consequence of human activities is the inadvertent accumulation of a variety of trace gases in the earth’s atmosphere. In the past decade, these global-scale changes in the chemical composition of the atmosphere have led to a very significant depletion of the stratospheric ozone layer over Antarctica in the southern spring months and also at northern latitude...
متن کاملStratospheric ozone depletion.
Solar ultraviolet radiation creates an ozone layer in the atmosphere which in turn completely absorbs the most energetic fraction of this radiation. This process both warms the air, creating the stratosphere between 15 and 50 km altitude, and protects the biological activities at the Earth's surface from this damaging radiation. In the last half-century, the chemical mechanisms operating within...
متن کاملAttribution of stratospheric ozone trends
Atmospheric Chemistry and Physics Discussions This discussion paper is/has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP if available. Abstract The decrease of the concentration of ozone depleting substances (ODS) in the stratosphere over the past decade raises the question to what extent observed changes in strat...
متن کاملIsotopic composition of stratospheric ozone
Using recently measured rates for isotopic variants of the ozone formation reaction , we derive expressions for the enrichment of symmetric and asymmetric and in stratospheric ozone and calculate total enrichments of 123‰ and 107‰ for and , respectively. We compare the calculations with measurements made with the Smithsonian Astrophysical Observatory far-infrared spectrometer during seven ballo...
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ژورنال
عنوان ژورنال: Journal of Environmental Conservation Engineering
سال: 1987
ISSN: 1882-8590,0388-9459
DOI: 10.5956/jriet.16.722