Cirrus duplicatus

Cirrus duplicatus
Abbreviation	Ci du
Symbol
Genus	Cirrus (curl of hair)
Variety	duplicatus (multiple layers)
Altitude	Above 5,000 m (Above 16,500 ft)
Classification	Family A (High-level)
Appearance	two or more overlapping layers^[1]
Precipitation cloud?	No

Cirrus duplicatus is a variety of cirrus cloud. The name cirrus duplicatus is derived from Latin, meaning "double".^[2] The duplicatus variety of cirrus clouds occurs when there are at least two layers of cirrus clouds. Most of the time, occurrences of cirrus fibratus and cirrus uncinus are in the duplicatus form.^[3] Like stratus clouds, cirrus clouds are often seen in the duplicatus form.^[4]

References

↑ Wolken Online. "Cirrus". Cloud Atlas. Retrieved 13 July 2011.
↑ Latin Lookup. "duplicatus". Retrieved 13 July 2011.
↑ Callanan, Martin. "Cirrus duplicatus". International Cloud Atlas. nephology.eu. Retrieved 13 July 2011.
↑ Dunlop, Storm (2003). The weather identification handbook (1st Lyons Press ed.). Guilford, Conn.: Lyons Press. p. 58. ISBN 1-58574-857-9. Retrieved 13 July 2011.

External links

International Cloud Atlas – Cirrus duplicatus

Cirrus cloud (Ci) types

Species	Cirrus castellanus (Ci cas) Cirrus fibratus (Ci fib) Cirrus floccus (Ci flo) Cirrus spissatus (Ci spa) Cirrus vertebratus (Ci ve) Cirrus uncinus (Ci unc)

Varieties	Cirrus duplicatus (Ci du) Cirrus intortus (Ci in) Cirrus radiatus (Ci ra) Cirrus undulatus (Ci un)

Variants	Cirrus aviaticus

Cloud genera and selected species, supplementary features, and other airborne hydrometeors - WMO Latin terminology except where indicated

Extreme-level	Polar mesospheric cirriform type Noctilucent

Very high-level	Polar stratospheric cirriform type Nacreous

High-level	Tropospheric cirriform, stratiform, and stratocumuliform genera Cirrus (Ci) Cirrostratus (Cs) Cirrocumulus (Cc) General type (non-WMO terminology) Aviaticus cloud (Contrail)

Medium-level	Tropospheric stratiform and stratocumuliform genera Altostratus (As) Altocumulus (Ac) Stratocumuliform species Altocumulus castellanus (Ac cas)

Low-level	Tropospheric stratiform, stratocumuliform and cumuliform genera Stratus (St) Stratocumulus (Sc) Cumulus (Cu) Stratiform and cumuliform species Fractus Cumulus humilis (Cu hum) Stratocumulus variants (non-WMO terminology) Actinoform cloud Undulatus asperatus

Moderate vertical	Tropospheric stratiform and cumuliform genera Nimbostratus (Ns) Cumulus (Cu) Cumuliform species Cumulus mediocris (Cu med) Cumuliform supplementary features Cumulus Pileus Cumulus Arcus (Roll)

Towering vertical	Tropospheric cumulonimbiform genus Cumulonimbus (Cb) Cumuliform species Cumulus congestus (ICAO term Towering cumulus [Tcu]) Cumuliform and cumulonimbiform supplementary features mamma Tuba (Funnel cloud) Pileus Arcus (Shelf) Cumuliform and cumulonimbiform variants (non-WMO terminology) Wall cloud Pyrocumulus Pyrocumulonimbus Cumulonimbus Overshooting top Hot tower

Surface based	General type Fog

Non-height specific	General types Accessory cloud Kelvin-Helmholtz cloud

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Cirrus duplicatus

See also

References

External links