Circumhorizon Arc Fragment, Nova Scotia

Cirrus fragments lit by a circumhorizon arc, Halifax, Nova Scotia.

Imaged by Daniel Dupuis on 3rd July 2001 with the sun 66° high.

The CHA is so large that it often fills cirrus clouds with its bright colours. This close up shows well the high spectral purity of the colours.

©2001 Daniel Dupuis, reproduced with permission.

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