WEATHERVIDEOHD.TV / SCIENCE PHOTO LIBRARY WEATHERVIDEOHD.TV / SCIENCE PHOTO LIBRARY
Timelapse footage of a layer of air pollution trapped near the ground. The pollution is prevented from rising by a temperature inversion, a layer of warm air that stops convection from below. This warm air is from downslope winds off the mountains, which warms quickly as it descends from altitude. Filmed in Colorado, USA, in winter.
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