Perlucidus is a cloud variety that generally appears in only two cloud types, with those cloud types being
altocumulus
Altocumulus (From Latin ''Altus'', "high", ''cumulus'', "heaped") is a middle-altitude cloud genus that belongs mainly to the ''stratocumuliform'' physical category characterized by globular masses or rolls in layers or patches, the individual ele ...
and
stratocumulus
A stratocumulus cloud, occasionally called a cumulostratus, belongs to a genus-type of clouds characterized by large dark, rounded masses, usually in groups, lines, or waves, the individual elements being larger than those in altocumulus, and th ...
, this cloud variety is easily recognizable, with its appearance being small gaps showing up in one of the cloud types that it shows up in, which let higher clouds be seen This cloud variety forms when shallow convection starts in a cloud layer that did not previously have perlucidus variety characteristics, the gaps that make the sky visible in these clouds indicate regions where air is sinking,
this cloud variety may appear either as a
translucent
In the field of optics, transparency (also called pellucidity or diaphaneity) is the physical property of allowing light to pass through the material without appreciable scattering of light. On a macroscopic scale (one in which the dimensions a ...
cloud or an
opaque
Opacity or opaque may refer to:
* Impediments to (especially, visible) light:
** Opacities, absorption coefficients
** Opacity (optics), property or degree of blocking the transmission of light
* Metaphors derived from literal optics:
** In lingu ...
cloud
See also
Opacus (cloud variety)
Translucidus (cloud variety) Translucidus is a cloud variety, it appears in altocumulus, altostratus, stratus, and stratocumulus clouds, this cloud variety is very recognizable, with its only feature being that it is translucent, and gives away the location of the Sun and Moon, ...
References
Cloud types
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