Monday, 15 July 2013

Circumzenithal arc

Look carefully in the middle - the rainbow-like Circumzenithal arc
Apparently if the sun is higher than 32.2 degrees in the sky you won't see one of these rare and spectacular sights.  It is a rainbow-like effect in the sky and only ever seen as a arc and contains refracted ice.  It seems so strange seeing a "rainbow" on such a hot, dry day!

Generally the arc will look like a smile but you still have to look carefully: these are the only photographs I have of Circumzenithal arcs and believe me, they're not easy to photograph.

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