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polar stratospheric cloud
[ poh-ler strat-uh-sfer-ik kloud, ‐-sfeer‐ ]
noun
, Meteorology.
- 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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