58.5 MB (5.5 MB compressed)
5539 x 3693 pixels
47.0 x 31.2 cm ⏐ 18.5 x 12.3 in (300dpi)
PEKKA PARVIAINEN / SCIENCE PHOTO LIBRARY PEKKA PARVIAINEN / SCIENCE PHOTO LIBRARY
Cirrocumulus clouds. Sky filled with small delicate cloudlets of the cirrocumulus type, to form a "Mackerel Sky". The illumination of the Sun behind the clouds can be seen. Cirrocumulus clouds form at high altitude (5,000-6,000 metres height and above) and are composed largely of ice crystals. They may form in lines, groups or ripples. The presence of cirrocumulus clouds indicates the approach of a frontal system and changing weather.
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