ozone layer depletion

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• Ozone layer — The ozone layer is a layer in Earth s atmosphere which contains relatively high concentrations of ozone (O3). This layer absorbs 97–99% of the Sun s high frequency ultraviolet light, which is potentially damaging to the life forms on Earth.[1] It …   Wikipedia

• ozone layer — Meteorol. the layer of the upper atmosphere where most atmospheric ozone is concentrated, from about 8 to 30 mi. (12 to 48 km) above the earth, with the maximum ozone concentration occurring at an altitude of about 12 mi. (19 km). Also called… …   Universalium

• ozone layer — /ˈoʊzoʊn leɪə/ (say ohzohn layuh) noun a region in the outer portion of the stratosphere, where atmospheric ozone (O3) is concentrated. Also, ozonosphere. The ozone layer is the layer of ozone which settles at between 15 and 30 kilometres… …  

• Vienna Convention for the Protection of the Ozone Layer — The Vienna Convention for the Protection of the Ozone Layer is a multilateral environmental agreement. It was agreed upon at the Vienna Conference of 1985 and entered into force in 1987.It acts as a framework for the international efforts to… …   Wikipedia

• Ozone depletion — Image of the largest Antarctic ozone hole ever recorded (September 2006) Ozone depletion describes two distinct but related phenomena observed since the late 1970s: a steady decline of about 4% per decade in the total volume of ozone in Earth s… …   Wikipedia

• ozone — noun ADJECTIVE ▪ atmospheric, ground level, stratospheric VERB + OZONE ▪ deplete, destroy ▪ form, produce …   Collocations dictionary

• Ozone-oxygen cycle — in the ozone layer. The ozone oxygen cycle is the process by which ozone is continually regenerated in Earth s stratosphere, all the while converting ultraviolet radiation into heat. In 1930 Sydney Chapman resolved the chemistry involved. The… …   Wikipedia

• ozone depletion — noun Damage to the ozone layer caused by compounds such as chlorofluorocarbons (CFCs) • • • Main Entry: ↑ozone …   Useful english dictionary

• Ozone — For other uses, see Ozone (disambiguation). Ozone …   Wikipedia

• ozone depletion — /oʊzoʊn dəˈpliʃən/ (say ohzohn duh pleeshuhn) noun a decline in the amount of ozone in the earth s stratosphere. Ozone depletion occurs in the stratosphere in response to the breakdown of compounds such as chlorofluorocarbons containing chlorine… …  

• Ozone depletion potential — The ozone depletion potential (ODP) of a chemical compound is the relative amount of degradation to the ozone layer it can cause, with trichlorofluoromethane (R 11 or CFC 11) being fixed at an ODP of 1.0. Chlorodifluoromethane (R 22), for example …   Wikipedia