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polar stratospheric cloud

[ poh-ler strat-uh-sfer-ik kloud, ‐-sfeer ]

noun

, Meteorology.
  1. an iridescent cloud in the winter polar stratosphere, as high as 15.5 miles (25 kilometers) above the earth: in both the Antarctic and the Arctic, these clouds contribute to ozone depletion by converting benign forms of chlorine into ozone-destroying forms and by eliminating the nitrogen compounds that curb the destructive effects of chlorine. : PSC


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Word History and Origins

Origin of polar stratospheric cloud1

First recorded in 1980–85
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Example Sentences

Because of the height and temperature needed this cloud is also known as Polar Stratospheric Cloud.

From BBC

It turned out that the models lacked a key ingredient: by considering only gas-phase atmospheric chemistry, they overlooked the activation of ozone-destroying chlorine species that occurs on and within polar stratospheric cloud particles at extremely low temperatures11,12.

From Nature

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polar sequencepolar vortex