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polar stratospheric cloud

polar stratospheric cloud (PSC) A cloud, consisting of ice crystals, which occurs in the stratosphere late in winter over Antarctica and, less commonly, over the Arctic. The water vapour that freezes may be derived from the dissociation of methane and the cloud forms in the very still, very cold air of a vortex over the pole (the less common occurrence of such clouds in the northern hemisphere is owing to the generally higher temperature of Arctic stratospheric air and the briefer duration of the vortex). The reactions that deplete polar stratospheric ozone in the late winter and early spring take place on the surface of the ice crystals in polar stratospheric clouds.

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polar stratospheric cloud

polar stratospheric cloud (PSC) A cloud, consisting of ice crystals, which occurs in the stratosphere late in winter over Antarctica and, less commonly, over the Arctic. The water vapour that freezes may be derived from the dissociation of methane and the cloud forms in the very still, very cold air of a vortex over the pole (the less common occurrence of such clouds in the northern hemisphere is owing to the generally higher temperature of Arctic stratospheric air and the briefer duration of the vortex). The reactions that deplete polar stratospheric ozone in the late winter and early spring take place on the surface of the ice crystals in polar stratospheric clouds.

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"polar stratospheric cloud." A Dictionary of Ecology. . Encyclopedia.com. 27 May. 2018 <http://www.encyclopedia.com>.

"polar stratospheric cloud." A Dictionary of Ecology. . Encyclopedia.com. (May 27, 2018). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/polar-stratospheric-cloud-0

"polar stratospheric cloud." A Dictionary of Ecology. . Retrieved May 27, 2018 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/polar-stratospheric-cloud-0

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Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.

Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, Encyclopedia.com cannot guarantee each citation it generates. Therefore, it’s best to use Encyclopedia.com citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:

Modern Language Association

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The Chicago Manual of Style

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American Psychological Association

http://apastyle.apa.org/

Notes:
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  • In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.