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The ozone layer peaks at 8 to 15 parts per million of ozone, [1] while the average ozone concentration in Earth's atmosphere as a whole is about 0.3 parts per million. The ozone layer is mainly found in the lower portion of the stratosphere, from approximately 15 to 35 kilometers (9 to 22 mi) above Earth, although its thickness varies ...
One example is the null cycle that occurs during the day between NO x and ozone. Tropospheric Null Cycle O 3 + NO → O 2 + NO 2. NO 2 + hν → NO + O(3 P) O (3 P) + O 2 + M → O 3 + M Net: hv → H This cycle links ozone to NOx in the troposphere during daytime. In equilibrium, described by the Leighton relationship, solar radiation and the ...
2 . Ozone is formed from dioxygen by the action of ultraviolet (UV) light and electrical discharges within the Earth's atmosphere. It is present in very low concentrations throughout the atmosphere, with its highest concentration high in the ozone layer of the stratosphere, which absorbs most of the Sun's ultraviolet (UV) radiation.
2 no + o 2 → 2 no 2 NO 2 is introduced into the environment by natural causes, including entry from the stratosphere , bacterial respiration, volcanos, and lightning. These sources make NO 2 a trace gas in the atmosphere of Earth , where it plays a role in absorbing sunlight and regulating the chemistry of the troposphere , especially in ...
NO 2 also reacts with ozone to form nitrate radical NO 2 + O 3 → NO 3 + O 2. During the daytime, NO 3 is quickly photolyzed back to NO 2, but at night it can react with a second NO 2 to form dinitrogen pentoxide. NO 2 + NO 3 (+M) → N 2 O 5 (+M). N 2 O 5 reacts rapidly with liquid water (in aerosol particles or cloud drops, but not in the ...
This series of reactions creates a null cycle, in which there is no net production or loss of any species involved. Since O(3 P) is very reactive and O 2 is abundant, O(3 P) can be assumed to be in steady state, and thus an equation linking the concentrations of the species involved can be derived, giving the Leighton relationship: [2] [3]
Ozone in the troposhere is determined by photochemical production and destruction, dry deposition and cross-tropopause transport of ozone from the stratosphere. [2] In the Arctic troposphere, transport and photochemical reactions involving nitrogen oxides and volatile organic compounds (VOCs) as a result of human emissions also produce ozone resulting in a background mixing ratio of 30 to 50 ...
Diagram illustrating the ozone-oxygen cycle NOTE: the text in the final version can't be modified but earlier versions can be if you wish to translate them. Date: 27 January 2010, 20:56 (UTC) Source: Ozone_cycle.jpg; Author: Ozone_cycle.jpg: created by NASA; derivative work: Smartse (talk) Other versions