© 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
CL = 2, CM = 0, CH = 1
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.
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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.
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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.
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