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27.1 MB (1.7 MB compressed)
3766 x 2515 pixels
32.0 x 21.3 cm ⏐ 12.6 x 8.4 in (300dpi)
PEKKA PARVIAINEN / SCIENCE PHOTO LIBRARY PEKKA PARVIAINEN / SCIENCE PHOTO LIBRARY
Cumulus cloud. Cumulus cloud with some vertical development, illuminated by the Sun. Cumulus clouds have rounded tops and those associated with rain are generally deep and dark in appearance from the ground, although not rising as high as cumulonimbus clouds. Cumulus may be formed at a frontal system boundary or as a result of thermal cell activity, with a low-altitude cloud base at between 300 and 1,000 metres (1,000 and 3,000 feet). The depth varies generally between 500 and 1,500 metres (1,500 feet and 5,000 feet).
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