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The ozone layer visible from space at Earth's horizon as a blue band of afterglow within the bottom of the large bright blue band that is the stratosphere, with a silhouette of a cumulonimbus in the orange afterglow of the troposphere. The ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet ...
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 ...
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 ...
Following the ozone depletion in 1997 and 2011, a 90% drop in ozone was measured by weather balloons over the Arctic in March 2020, as they normally recorded 3.5 parts per million of ozone, compared to only around 0.3 parts per million lastly, due to the coldest temperatures ever recorded since 1979, and a strong polar vortex which allowed ...
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
[1] [2] Ozone is also an important constituent of the stratosphere, where the ozone layer (2 to 8 parts per million ozone) exists which is located between 10 and 50 kilometers above the Earth's surface. [3] The troposphere extends from the ground up to a variable height of approximately 14 kilometers above sea level.
Each oxygen atom may then combine with an oxygen molecule to form an ozone molecule: 2. ozone creation: O + O 2 + A → O 3 + A where A denotes an additional molecule or atom, such as N 2 or O 2, required to maintain the conservation of energy and momentum in the reaction. Any excess energy is produced as kinetic energy.
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]