What happens when you mix strong wind, temperatures between plus one Celsius and minus one Celsius, foggy air, and a fence in Northumberland’s Cheviot Hills?
You get “rime ice” like the incredible shelf-like design in these photos. Rime ice forms when the water in moist, foggy air freezes to the outer surface of an object. Interestingly enough, this means that the wind here was actually blowing from right to left.
“What was astonishing was the uniformity of the length of the icicle sheets along the entire length of the fence,” said Nick Mattlock, who initially sent these pictures to the BBC. “It literally looked like a couple of hundred metres of book shelving!”