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Image Gallery: Curious Clouds

Islands in the Clouds

Clouds and mountains in Norway.

(Image credit: Konstantinos Kourtidis, distributed by the EGU under a Creative Commons License)

Clouds fill in mountain valleys in this 2008 aerial photo of northern Norway.

Horizontal Tornado

A roll cloud along the Brazilian coast.

(Image credit: Capt. Andreas M. van der Wurff )

A roll cloud, associated with thunderstorm downdrafts and strange sea winds, tumbles across the sky off the coast of Brazil. Roll clouds are rare and harmless, though ominous-looking.

Altocumulus Clouds

(Image credit: NOAA/Ralph F. Kresge)

Altocumulus clouds in the sky.

Wispy Cirrus Clouds

(Image credit: NOAA/Ralph F. Kresge)

Cirrus clouds move across the sky.

Clouds from Above

(Image credit: NOAA Photo Library)

Towering cumulus clouds as seen from above.

On the Horizon

(Image credit: NOAA Photo Library)

Above the stratocumulus looking at multi-layers of clouds.

Swallows and Storm Clouds

Swallows fly beneath clouds.

(Image credit: Konstantinos Kourtidis, distributed by the EGU under a Creative Commons License)

Swallows swoop below storm clouds, feeding on insects sucked skyward by updrafts.

Polar Clouds

polar clouds in stratosphere

(Image credit: Markus Rex, Alfred Wegener Institute)

These polar clouds, which are composed of frozen nitric acid and sulfuric acid, form when temperatures in the stratosphere fall below minus 108 F (minus 78 C). This is currently the case in vast sections of the Arctic. Chemical processes on the surface of the cloud particles transform the initially harmless chemicals from chlorofluorocarbons (CFCs) into aggressive ozone-depleting substances.

Clouds above the Arctic

stratosphere clouds over Arctic

(Image credit: Ross J. Salawitch, University of Maryland)

Stratospheric clouds above the Arctic.

Mirroring the Sky

A lake reflects clouds in Slovenia.

(Image credit: Mary Gagen, distributed by the EGU under a Creative Commons License)

The sky appears upside-down in Lake Bohinj, Slovenia.

Live Science Staff
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