© Jarmo Koistinen

Espoo, Finland

Latitude: 60° 0' 0'' N

Longitude: 25° 0' 0'' E

10 February 2010 1306 (Local Time)
Camera direction: towards NE

Image P/S code: P.9.17

Image I.D.: 4896

C_L = 2, C_M = 0, C_H = 1

• Images & related info Other Images Images of 1987 edition
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  Cumulus mediocris homogenitus

  The image presents Cumulus and Stratocumulus generated by the thermal plumes from a coal-using power plant, located 2 km from the photographer.

  Due to a calm wind, the plumes rise vertically. The base level of the condensed cloud is about 400 m (estimated using the chimney height of 150 m as a reference). Stratocumulus has spread out under a low-level inversion, while thermals immediately above the chimneys have penetrated the inversion to form Cumulus mediocris. The anthropogenic nature of the cloud means that the classification “homogenitus” also applies.

  Higher in the sky, there is also anthropogenic Cirrus formed from the spreading out of aircraft contrails (Cirrus homogenitus); this is Cirrus fibratus homogenitus.

  Links in the image description will highlight features on the image. Mouse over the features for more detail.

  © Jarmo Koistinen
  Espoo, Finland
  Latitude: 60° 0' 0'' N
  Longitude: 25° 0' 0'' E
  10 February 2010 1306 (Local Time)
  
  
  Camera direction: towards NE
  C_L = 2, C_M = 0, C_H = 1
  Image P/S code: P.9.17
  Image I.D.: 4896
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  Cold polar air mass and a high pressure ridge cover Southern Finland. Calm winds and an almost clear sky have generated very stable conditions in the lowest troposphere.
  © Deutscher Wetterdienst
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  The sounding measured 1 hour after the image, 100 km north-west of the site, shows a stable troposphere below the level of 1 500 m. The lowest inversion layer is below 600 m.
  © University of Wyoming
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  Cumulus homogenitus

  This Cumulus cloud was generated as a result of convection caused by rising thermals from two man-made fires in a field at Clinton Centre on the Yorke Peninsula in South Australia, Australia. Since the cloud was formed as a direct result of human activity, it is classified as Cumulus homogenitus. Plumes of smoke can be seen rising above the fires, becoming more dispersed under the cloud base.  

  Links in the image description will highlight features on the image. Mouse over the features for more detail.

  © Donald Hatch
  Clinton Centre, South Australia, Australia
  Latitude: 34° 14' 8'' S
  Longitude: 137° 55' 2'' E
  13 April 1999 1300 (Local Time)
  
  
  Camera direction: towards E
  Image P/S code: S.9.17
  Image I.D.: 4822
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  Cumulus mediocris homogenitus

  The main feature of this picture is the lines of Cumulus mediocris homogenitus, produced by two power plants located to the west of Köln, Germany. There is also some Cirrus and the visibility is reduced by haze. 

  Links in the image description will highlight features on the image. Mouse over the features for more detail.

  © Javier Martin-Vide
  Köln, Germany
  Latitude: 50° 56' 11'' N
  Longitude: 6° 56' 22'' E
  28 August 2012 1835 (Local Time)
  
  
  Camera direction: towards W
  C_L = 2, C_M = 0, C_H = 1
  Image P/S code: S.9.17
  Image I.D.: 4958