Ozone in the stratosphere—a layer of the atmosphere between 15 and 50 kilometers (10 and 31 . Timeline of Stratospheric Ozone Depletion and Observations. Ozone depletion describes two related events observed since the late s: a steady lowering The main cause of ozone depletion and the ozone hole is manufactured chemicals, especially manufactured halocarbon refrigerants, solvents, "Newly detected ozone-depleting substances in the atmosphere" ( PDF). Effects of ozone layer depletion on humans homeranking.info publication_files/pdf) provide an extensive review of.
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The objective of this paper is to review the origin, causes, mechanisms and bio effects of ozone layer depletion as well as the protective. Ozone layer damage is one of them. The objective of this paper is to review the origin, causes, mechanisms and bio effects of ozone layer depletion as well as. However, the ozone layer is destroyed by man-made chemicals known as ozone- depleting substances (ODS). Scientific research has proved that the natural.
Secular variation". Some stratospheric cooling is also predicted from increases in greenhouse gases such as CO 2 and CFCs themselves; however, the ozone-induced cooling appears to be dominant. Stratospheric phenomena of Earth. CS1 maint: However, CFCs are well mixed globally in the troposphere and stratosphere. Once in the stratosphere, the Cl and Br atoms are released from the parent compounds by the action of ultraviolet light, e. A single chlorine atom would continuously destroy ozone thus a catalyst for up to two years the time scale for transport back down to the troposphere were it not for reactions that remove them from this cycle by forming reservoir species such as hydrogen chloride HCl and chlorine nitrate ClONO 2.