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Chemistry and radiation changes in the ozone layer by Christos S. Zerefos, Ivar S.A. Isaksen, Ioannis Ziomas

By Christos S. Zerefos, Ivar S.A. Isaksen, Ioannis Ziomas

Fresh experiences have validated a hyperlink among ozone adjustments because of human actions and altering UV degrees on the Earth's floor, in addition to a hyperlink to weather via alterations in radiative forcing and hyperlinks to adjustments in chemical composition. This e-book attracts jointly key scientists who supply cutting-edge contributions at the variable ozone layer and the interaction of longwave and shortwave radiative interactions which hyperlink ozone, the weather and UV concerns.

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Both vehicles would be piloted, and both would be able to fly back to land like conventional aircraft. The booster would have been powered by 12 rocket engines, burning liquid hydrogen and liquid oxygen to lift the paired vehicles from the ground; when the se had exhausted their fuel, the orbiter would break away and continue into space using its own hydrogen/oxygen fuelled rockets, lea vin g the booster to fly back to base under the power of its auxiliary jet engines. Such a plan was ambitious, and expensive.

Indeed, the full name for this class of compounds, chlorofluorocarbons, indicates that they are built up from atom s of chlorine, fluorine and carbon. Du Pont, the major manufacturer of CFCs, gave their own products the brand name Freons, and developed a labelling system which indicates, to the cognoscenti, how many atom s of each kind are present in a particular type of Freon . This system· * is now widely used for ali CFCs; a shorthand naming system has evolved in which the two most commonly used CFCs are known as F -11 and F -12 - their full chemical names are trichlorofluoromethane (CCI 3F) and dichlorofluoromethane (CCI 2F 2).

But in Britain at least, this was seen as interesting news for scientists, not for the general public, and any hazards were perceived as remote problems for the future. At the time, I was on the staff of Nature, responsible for the Nature-Times News Service, which prepared daily reports on topics of broad scientific interest for The Times. But I completely failed to see what an important 'story' the work by Rowland and Molina would become, and never gave it the headlines and detailed coverage that, looking back from the perspective of 1987, it so obviously deserved .

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