Ailsa Craig: viewing an optical effect over the Firth of Clyde

The pyramidal island of Ailsa Craig became distorted by a temperature inversion over the water, changing its shape. There was no shimmering or movement, and the illusion was visible for many minutes.

Above: The sky over the Firth of Clyde, with the Isle of Arran to the right and Ailsa Craig to the left (Photo: Aaron Watson)

 
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Above: Zoomed photos showing how the shape of Ailsa Craig was being distorted by atmospheric effects, making it appear to taper towards the surface of the water (Photos: Aaron Watson)