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UNIT CLOUDINESS [1 record]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 1999-12-24

English

Subject field(s)
  • Atmospheric, Climatic and Meteorological Phenomena
DEF

Portion of the skycover reported in tenths (North America, mostly) or in oktas.

CONT

Compared to satellite estimates, human observations overestimate cloudiness by about 0.2 -0.0013ø tenths of cloud (where ø is the latitude in degrees), e.g. 0.15 tenths at 40°. This is because cumuliform clouds are more common at lower latitudes. Note that apart from using 'okta' units of cloudiness (i.e. eighths of the sky covered by cloud), we may express the fraction in 'tenths'. In other words, 4 oktas equals 5 tenths.

French

Domaine(s)
  • Phénomènes météorologiques, climatiques et atmosphériques
OBS

La nébulosité s'évalue en dixièmes de surface du ciel ou en octas (huitièmes de surface).

Spanish

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