© Alexandra Nikolaevna Petrova

Near Yakutsk, Sakha Republic, Russian Federation

Latitude: 61° 15' 45'' N

Longitude: 128° 45' 38'' E

04 July 2015 2000 (Local Time)
Camera direction: towards W

Image P/S code: S.7.4

Image I.D.: 4754

C_L = 5, C_M = 3, C_H = 1

• Images & related info Other Images Images of 1987 edition
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  Stratocumulus castellanus and floccus

  This image shows an example of high-base Stratocumulus species castellanus and species floccus. Castellanus is typically arranged in a line and rises from a common horizontal base. The upper part has a crenelated appearance that is very noticeable when seen from the side. Also visible in this photo are tufts with a ragged appearance (3 and 4), which constitute floccus. In this photograph the castellanus and floccus are both borderline with Altocumulus, but due to the size of the elements, they may be considered to belong to the lower cloud level. Also visible is a distant patch of Altocumulus stratiformis and, at the top of the image, Cirrus uncinus. As the latter appears to be converging towards a point on the horizon, is variety radiatus.

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  © Alexandra Nikolaevna Petrova
  Near Yakutsk, Sakha Republic, Russian Federation
  Latitude: 61° 15' 45'' N
  Longitude: 128° 45' 38'' E
  04 July 2015 2000 (Local Time)
  
  
  Camera direction: towards W
  C_L = 5, C_M = 3, C_H = 1
  Image P/S code: S.7.4
  Image I.D.: 4754
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  Stratocumulus castellanus beneath Stratocumulus stratiformis opacus

  This spectacular image of Hong Kong (China) has captured a sky with three species of Stratocumulus present: lenticularis, castellanus and stratiformis.

  The lowest cloud base (600 m) is shared by lenticularis and castellanus as instability is triggering the growth of cumuliform turrets in the lenticularis here and here. The essential features of castellanus – that is, “cumuliform masses arranged in lines, rising from a common horizontal base” – are clearly visible.

  A dark grey, thick layer of Stratocumulus stratiformis opacus, comprised of long merged rolls, is at the top of the image (base 1 400 m). This layer was thinning and dissipating on the north-eastern edge, as evidenced by the lighter grey colour and sunlight on the horizon.

  Patches of Cumulus fractus and a few Cumulus humilis cells can be seen at the same base as the lower Stratocumulus. The coding is C_L = 8 as there is Cumulus and Stratocumulus at different bases and the Stratocumulus has not formed from the spreading of Cumulus.

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  © Barry Chan
  The Peak, Hong Kong, China
  Latitude: 22° 16' 33'' N
  Longitude: 114° 8' 30'' E
  07 June 2014 0825 (Local Time)
  
  
  Camera direction: towards NNE
  C_L = 8, C_M = /, C_H = /
  Image P/S code: P.7.4
  Image I.D.: 5803