ANDY DAVIES / SCIENCE PHOTO LIBRARY ANDY DAVIES / SCIENCE PHOTO LIBRARY
Timelapse footage of fog in a valley contained by a temperature inversion. The inversion has a layer of warm air above a bottom layer of cooler air, meaning the air below cannot convect into the upper layers as it normally can. Filmed in the Tywi Valley near Dinefwr Castle, Carmarthenshire, Wales, UK.
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