Australian Weather Calendar: January 2016
Liam Byrne spotted this fogbow while driving across Tasmania in winter 2010. He had packed his camera, as he was taking the ‘scenic route’ past Great Lake, but adds ‘Everywhere in Tassie is a nice drive’.
Fog forms when water vapour condenses into tiny droplets suspended in the air. For this to occur, there must be enough moisture in the air, light winds and clear skies. Just as sunlight refracted by raindrops forms rainbows, light passing through fog can form ‘fogbows’. As the droplets in fog are much smaller than raindrops, the colours produced are weaker, so the bow can appear almost white.Liam was using a Nikon D80 with a graduated neutral density filter.