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The others pictures of "Circumzenithal arc" |
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| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | |
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Circumzenithal arc in a cumulonimbus |
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| Instrument |
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38 mm focal length, composite of 8 pictures |
| Exposure & film |
1/700 s with digital camera DC3400 Zoom |
| Date & place |
January 14, 2004, Quimper |
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Here is a case in which a circumzenithal arc can occur. In the present case, a big cloud, a cumulonimbus, mask the Sun. The top o fthe cloud touch the troposphere and generate a kind of thin cloudy layer. In this cirrus-like cloud, the ice cristals diffract the sunlight.
So, a circumzenithal arc, visible in the upper part of the picture, appear. It remained visible a few minutes, till the thin clouds shift. |
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The others pictures of "Circumzenithal arc" |
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| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | |
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A Shower of
Stars in Brittany
Brittany by night
in panorama!
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