Global Bioweather

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High Clouds

Apart from the hot tropics, clouds with their base above 16500 feet consist entirely of ice crystals. They are, therefore, thin and transparent clouds. They are aptly prefixed with cirro, meaning a wisp of hair. Three main types make up the family of high clouds:

cirrostratus – a layered wisp of thin clouds

cirrocumulus – heaped or patches of wispy clouds

cirrus – detached clouds with the appearance of a tuft of hair.

Cirrocumulus

Cirrostratus often associated with a halo

Cirrostratus and sunrays

The typical tufts of cirrus

Cirrus at sunset