Polar stratospheric clouds seen from research a/c

Polar stratospheric clouds seen from research a/c

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Caption: Type II polar stratospheric clouds (PSC II), seen from a NASA DC-8 research aircraft over the Arctic. The bright PCS IIs are at an altitude of 15,300m, and are composed of crystals of water ice. The clouds exhibit a 'wave' structure, caused by the effect of mountains on the winds that move the clouds. PSCs are found in the circumpolar vortex winds that circle both poles. Type I PSCs (made of nitric acid crystals) have been linked with the chemical processes that are depleting the ozone layers over the Arctic and Antarctic regions.

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Keywords: climate, cloud types, clouds, meteorology, ozone layer depletion, polar srat. clouds, polar stratosph., polar stratospheric clouds, psc, type ii polar stratos. clouds, wave clouds, weather

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